---
title: Protection of IO-Link With SurgeSwitch®
description: Semtech's SurgeSwitch TDS3311P is ideal for safeguarding IO-Link ports – enabling a smooth, glitch-free uninterrupted user experience.
image: https://blog.semtech.com/hubfs/Semtech_Blog_EDS_Protection_SS_IOLink%20(1).jpg
---
[Skip to main content](https://blog.semtech.com/protection-of-io-link-with-surgeswitch#content)
- [Cross Reference](https://www.semtech.com/design-support/cross-reference-search)
- [Parametric](https://www.semtech.com/design-support/parametric-search)
- [Shop](https://www.semtech.com/shop)
- [Investors](https://investors.semtech.com/)
- [mySemtech](https://semtech.my.site.com/DP/)
- EN
- [EN](https://www.semtech.com/)
- [CN (中文)](https://www.semtech.cn/)
- [JP (日本語)](https://www.semtech.jp/)
- [FR](https://www.semtech.fr/)
[](https://www.semtech.com)
- [LoRa®](https://www.semtech.com/lora)
- [LoRa® Overview](https://www.semtech.com/lora)
### LoRa Overview
LoRa is the de facto wireless platform of Internet of Things (IoT). Semtech's LoRa chipsets connect sensors to the Cloud and enable real-time communication of data and analytics that can be utilized to enhance efficiency and productivity.
[Read More](https://www.semtech.com/lora)
- [LoRa (PHY)](https://www.semtech.com/lora/what-is-lora)
- [Benefits of LoRa](https://www.semtech.com/lora/why-lora)
- [LoRaWAN® Standard](https://www.semtech.com/lora/lorawan-standard)
- [Products](https://www.semtech.com/products/wireless-rf)
- [Applications](https://www.semtech.com/lora/lora-applications)
### Applications Overview
With an ever-increasing number of IoT vertical applications, LoRa devices and the LoRaWAN standard is creating business efficiencies and improving lives around the world.
[Read More](https://www.semtech.com/lora/lora-applications)
- [Agriculture](https://www.semtech.com/lora/lora-applications/smart-agriculture)
- [Cities](https://www.semtech.com/lora/lora-applications/smart-cities)
- [Environment](https://www.semtech.com/lora/lora-applications/smart-environment)
- [Healthcare](https://www.semtech.com/lora/lora-applications/smart-healthcare)
- [Buildings](https://www.semtech.com/lora/lora-applications/smart-buildings)
- [Homes](https://www.semtech.com/lora/lora-applications/smart-homes)
- [Industrial Control](https://www.semtech.com/lora/lora-applications/smart-industrial-control)
- [Retail](https://www.semtech.com/lora/lora-applications/smart-retail)
- [Supply Chain and Logistics](https://www.semtech.com/lora/lora-applications/smart-supply-chain-logistics)
- [Electricity](https://www.semtech.com/lora/lora-applications/smart-electricity-metering)
- [Gas](https://www.semtech.com/lora/lora-applications/smart-gas-metering)
- [Water](https://www.semtech.com/lora/lora-applications/smart-water-metering)
- [Ecosystem](https://www.semtech.com/lora/ecosystem)
### Ecosystem Overview
LoRa is bolstered by a diverse global ecosystem of hardware manufacturers, software designers, network providers, and industry associations.
[Read More](https://www.semtech.com/lora/ecosystem)
- [LoRa Alliance®](https://www.semtech.com/lora/ecosystem/lora-alliance)
- [Featured Sensor Use Cases](https://www.semtech.com/lora/ecosystem/sensor-features)
- [Gateways](https://www.semtech.com/lora/ecosystem/gateways)
- [Software](https://www.semtech.com/lora/ecosystem/software)
- [Networks](https://www.semtech.com/lora/ecosystem/networks)
- [Industry Alliances](https://www.semtech.com/lora/ecosystem/industry-alliances)
- [Resources](https://www.semtech.com/lora/resources)
### Resources Overview
Explore our top resources to help you learn more about LoRa devices and the LoRaWAN standard or bring a LoRa-based solution to market.
[Read More](https://www.semtech.com/lora/resources)
- [LoRa Products Overview](https://www.semtech.com/lora/resources)
- [Videos](https://www.semtech.com/lora/resources/lora-videos)
- [White Papers & Use Cases](https://www.semtech.com/lora/resources/lora-white-papers)
- [LoRa Developers & Tech Support](https://www.semtech.com/lora/resources/lora-community)
- [LoRa Calculator](https://www.semtech.com/design-support/lora-calculator)
- [Amazon Sidewalk](https://info.semtech.com/sidewalk)
- [Academy for LoRaWAN](https://www.semtech.com/lora/resources/lorawan-academy)
- [Logo Use](https://www.semtech.com/company/brand-resources)
- [Press Releases](https://www.semtech.com/company/press/category/pr-lora-wireless-rf)
- [Press Coverage](https://www.semtech.com/company/news/category/pr-lora-wireless-rf)
- [Contact](https://www.semtech.com/company/contact/support)
- [Products](https://www.semtech.com/products)
- [Products Overview](https://www.semtech.com/products)
### Products Overview
Thousands of customers worldwide rely on our diverse product portfolio and world class technology roadmap for solutions in low power wireless communications, optical data transport, video broadcasting, power management, circuit protection, touch sensing, and more.
[Read More](https://www.semtech.com/products)
### Quick Links
- [Product Selector Guides](https://www.semtech.com/design-support/product-guides)
- [Shop](https://www.semtech.com/shop)
- [Parametric Search](https://www.semtech.com/design-support/parametric-search)
- [LoRa® Wireless RF](https://www.semtech.com/products/wireless-rf)
### Products Overview
LoRa®, a long range, low power platform, and the de facto wireless platform of Internet of Things, is highly integrated and cost-effective, boasting a notable battery life of up to 20 years, a 3-mile range in urban environments and a 30-mile range outdoors.
[Read More](https://www.semtech.com/products/wireless-rf)
- [ICs for Gateways](https://www.semtech.com/products/wireless-rf/lora-core)
- [ICs for Sensors](https://www.semtech.com/products/wireless-rf/lora-connect)
- [LoRa Cloud™](https://loracloud.com)
- [Software Library](https://www.semtech.com/products/wireless-rf/software-library-protocol-solution)
- [Circuit Protection](https://www.semtech.com/products/circuit-protection)
### Products Overview
Sophisticated devices that protect sensitive circuitry from Electrostatic Discharge (ESD), Electrical Fast Transients (EFT), Cable Discharge Events (CDE), and other electrical overstress.
[Read More](https://www.semtech.com/products/circuit-protection)
### Circuit Protection Products
- [ESD Protection Diodes](https://www.semtech.com/products/circuit-protection/esd-protection)
- [TVS Diodes](https://www.semtech.com/products/circuit-protection/tvs-diodes)
### Interfaces
- [Antenna](https://www.semtech.com/products/circuit-protection/antenna)
- [Automotive Ethernet](https://www.semtech.com/products/circuit-protection/automotive-ethernet)
- [Automotive High Speed](https://www.semtech.com/products/circuit-protection/automotive-high-speed)
- [Ethernet](https://www.semtech.com/products/circuit-protection/ethernet)
- [HDMI](https://www.semtech.com/products/circuit-protection/hdmi)
- [RS-485](https://www.semtech.com/products/circuit-protection/rs485)
- [USB](https://www.semtech.com/products/circuit-protection/usb)
- [VBUS](https://www.semtech.com/products/circuit-protection/vbus)
- [Signal Integrity](https://www.semtech.com/products/signal-integrity)
### Products Overview
A comprehensive portfolio of innovative optical, analog and mixed-signal semiconductor solutions that serve the rising global demand for high-speed data transmission products.
[Read More](https://www.semtech.com/products/signal-integrity)
- [Clock & Data Recovery](https://www.semtech.com/products/signal-integrity/clock-and-data-recovery)
- [Laser Drivers and Transceivers](https://www.semtech.com/products/signal-integrity/laser-drivers-transceivers)
- [Limiting Amplifiers](https://www.semtech.com/products/signal-integrity/limiting-amplifiers)
- [ROSAs](https://www.semtech.com/products/signal-integrity/rosas)
- [Signal Conditioners](https://www.semtech.com/products/signal-integrity/signal-conditioners)
- [Transimpedance Amplifiers](https://www.semtech.com/products/signal-integrity/transimpedance-amplifiers)
- [Professional AV](https://www.semtech.com/products/professional-av)
### Products Overview
Advanced off-the-shelf technology that enables end-to-end systems and integrates advanced inline signal processing capabilities such as light compression, broadcast quality scaling and audio down-mixing.
[Read More](https://www.semtech.com/products/professional-av)
- [BlueRiver®](https://www.semtech.com/products/professional-av/blueriver)
- [USB Extension](https://www.semtech.com/products/professional-av/usb-extension)
- [PerSe® Smart Sensing](https://www.semtech.com/products/perse-smart-sensing)
### Products Overview
Ultra-low power, feature-rich touch controllers that are optimized for numerous applications and provide best-in-class sensitivity with robust noise immunity to enhance touch and near range proximity detection.
[Read More](https://www.semtech.com/products/perse-smart-sensing)
- [PerSe® Connect](https://www.semtech.com/products/perse-smart-sensing/perse-connect)
- [PerSe® Contact](https://www.semtech.com/products/perse-smart-sensing/perse-contact-human-sensor)
- [PerSe® Control](https://www.semtech.com/products/perse-smart-sensing/perse-control-touch-proximity-sensor)
- [IO Expanders](https://www.semtech.com/products/perse-smart-sensing/io-expanders)
- [Broadcast Video](https://www.semtech.com/products/broadcast-video)
### Products Overview
Award-winning solutions designed specifically to push real-world broadcast boundaries in performance, reach, power, and signal integrity while reducing time to market and design risks.
[Read More](https://www.semtech.com/products/broadcast-video)
- [AV Interface & Protocol Conversion](https://www.semtech.com/products/broadcast-video/av-interface-protocol-conversion)
- [Configurable EQ/CD](https://www.semtech.com/products/broadcast-video/configurable-eq-cd)
- [Cable Drivers](https://www.semtech.com/products/broadcast-video/cable-drivers)
- [Cable Equalizers](https://www.semtech.com/products/broadcast-video/cable-equalizers)
- [Crosspoints](https://www.semtech.com/products/broadcast-video/crosspoints)
- [Receivers (Deserializers)](https://www.semtech.com/products/broadcast-video/receivers-deserializers)
- [Reclocking](https://www.semtech.com/products/broadcast-video/reclocking)
- [Transmitters (Serializers)](https://www.semtech.com/products/broadcast-video/transmitters-serializers)
- [Power Management](https://www.semtech.com/products/power-management)
### Products Overview
A pioneer in power management ICs across networking and industrial power, handheld power and automotive applications, Semtech leads the quest to enable a new class of greener, smarter and smaller end products.
[Read More](https://www.semtech.com/products/power-management)
- [EcoBrite LED Drivers](https://www.semtech.com/products/power-management/ecobrite-led-drivers)
- [EcoSpeed DC-DC Converters](https://www.semtech.com/products/power-management/ecospeed-dc-dc-converters)
- [FemtoBuck DC-DC Regulators and Controllers](https://www.semtech.com/products/power-management/femtobuck-dc-dc-regulators-controllers)
- [FemtoSwitch Load Switch ICs](https://www.semtech.com/products/power-management/femtoswitch-switches)
- [nanoSmart LDOs](https://www.semtech.com/products/power-management/nanosmart-ldos)
- [Neo-Iso Solid State Relays](https://www.semtech.com/products/power-management/neo-iso-solid-state-relays)
- [Special Functions](https://www.semtech.com/products/power-management/special-functions)
- [Cellular IoT Solutions](https://www.semtech.com/products/cellular-iot-solutions)
### Products Overview
Leading edge-to-Cloud solutions delivering the device, software and connectivity services needed to simplify and accelerate data-driven transformation with cellular IoT.
[Read More](https://www.semtech.com/products/cellular-iot-solutions)
- [Managed Connectivity](https://www.semtech.com/products/cellular-iot-solutions/managed-connectivity)
- [Modules](https://www.semtech.com/products/cellular-iot-solutions/modules)
- [Router Solutions](https://www.semtech.com/products/cellular-iot-solutions/router-solutions)
- [Technology](https://www.semtech.com/technology)
- [Technology Overview](https://www.semtech.com/technology)
### Technology Overview
Our highly differentiated, disruptive analog and mixed-signal semiconductors and advanced algorithms enable today's most innovative electronics within some of the fastest growing verticals and markets.
[Read More](https://www.semtech.com/technology)
### Quick Links
- [Related Applications](https://www.semtech.com/applications)
- [LoRa White Papers & Infographics](https://www.semtech.com/lora/resources/lora-white-papers)
- [Product Selector Guides](https://www.semtech.com/design-support/product-guides)
- [LoRa® Wireless RF For The IoT](https://www.semtech.com/lora)
### LoRa Wireless RF For The IoT Overview
LoRa is the de facto wireless platform of Internet of Things (IoT). Semtech's LoRa chipsets connect sensors to the Cloud and enable real-time communication of data and analytics that can be utilized to enhance efficiency and productivity.
[Read More](https://www.semtech.com/lora)
- [LoRa (PHY)](https://www.semtech.com/lora/what-is-lora)
- [Benefits of LoRa](https://www.semtech.com/lora/why-lora)
- [LoRaWAN® Standard](https://www.semtech.com/lora/lorawan-standard)
- [PerSe® Smart Sensing](https://www.semtech.com/technology/perse)
### PerSe® Smart Sensing Overview
Semtech's PerSe technology intelligently senses human presence for optimized connectivity and enhanced user experience.
[Read More](https://www.semtech.com/technology/perse)
### Quick Links
- [Infographic](https://info.semtech.com/perse-smart-sensing-infographic)
- [Brochure](https://www.semtech.com/uploads/common/PerSe_One_Pager.pdf)
- [Blogs](https://blog.semtech.com/topic/perse)
- [Products](https://www.semtech.com/products/perse-smart-sensing)
- [Tri-Edge™ PAM4 CDR](https://www.semtech.com/technology/tri-edge)
### Tri-Edge PAM4 CDR Overview
Tri-Edge is a CDR platform optimized for PAM4 optical interconnect in next-generation 200G and 400G data center module and AOC applications.
[Read More](https://www.semtech.com/technology/tri-edge)
### Quick Links
- [Tri-Edge White Paper](https://info.semtech.com/en/tri-edge-white-paper)
- [Product Selector Guide](https://www.semtech.com/uploads/design-support/Semtech_Optical_Product_Guide.pdf)
- [Open Eye MSA](https://www.openeye-msa.org/)
- [BlueRiver Platform For SDVoE™](https://www.semtech.com/technology/blueriver)
### BlueRiver Platform For SDVoE™
BlueRiver AV-over-IP chipsets are the world’s only chipsets to transport uncompressed, zero-latency Ultra HD/4K HDR over standard Ethernet and are the foundation for Software Defined Video Over Ethernet (SDVoE) technology.
[Read More](https://www.semtech.com/technology/blueriver)
- [BlueRiver OVERVIEW](https://www.semtech.com/technology/blueriver)
- [BlueRiver APPLICATIONS](https://www.semtech.com/technology/blueriver-applications)
- [BlueRiver VERTICAL MARKETS](https://www.semtech.com/technology/blueriver-vertical-markets)
- [SDVoE ALLIANCE®](https://www.semtech.com/technology/blueriver-sdvoe)
- [Circuit Protection](https://www.semtech.com/technology/esd-protection)
### Circuit Protection Overview
Semtech is leading the way in Transient Voltage Suppression (TVS) protection solutions that safeguard electronics systems against damage or latch-up caused by electrostatic discharge (ESD), lightning (surge), and other destructive voltage transients.
[Read More](https://www.semtech.com/technology/esd-protection)
- [Circuit Protection Overview](https://www.semtech.com/technology/esd-protection)
- [Z-Platform](https://www.semtech.com/technology/z-platform)
- [Design Resources](https://www.semtech.com/design-support/)
- [Design Resources Overview](https://www.semtech.com/design-support/)
### Design Resources Overview
Semtech places a high importance on delivering superior design support and provides a wealth of tools and resources with the goal of shortening your time to revenue for your new product introductions.
[Read More](https://www.semtech.com/design-support/)
- [Product Guides](https://www.semtech.com/design-support/product-guides)
- [Development Support Documentation](https://www.semtech.com/design-support/development-support-documents/)
- [Parametric Search](https://www.semtech.com/design-support/parametric-search)
- [Quality Assurance](https://www.semtech.com/quality/search-pb-lead-free-rohs-green)
- [LoRa GitHub](https://github.com/LoRa-Net)
- [LoRa PCB Design Review](https://info.semtech.com/pcb-design-review-service)
- [LoRa Calculator](https://www.semtech.com/design-support/lora-calculator)
- [LoRaWAN Academy and Training](https://learn.semtech.com/)
- [Product Cross Reference Search](https://www.semtech.com/design-support/cross-reference-search)
- [Frequently Asked Questions](https://www.semtech.com/design-support/faq)
- [mySemtech Document Portal](https://semtech.my.site.com/DP/)
- [IoT Applications](https://www.semtech.com/applications)
### Internet of Things
Award-winning LoRa Technology, ESD and surge protection, and smart control platforms for Internet of Things-enabled devices and low power, wide area network (LPWAN) infrastructure.
[Read More](https://www.semtech.com/applications)
- - [Smart Agriculture](https://www.semtech.com/applications/internet-of-things/smart-agriculture)
- [Smart Buildings](https://www.semtech.com/applications/internet-of-things/smart-building-automation)
- [Smart Cities](https://www.semtech.com/applications/internet-of-things/smart-cities)
- [Smart Emergency](https://www.semtech.com/applications/internet-of-things/smart-emergency-response)
- [Smart Environment](https://www.semtech.com/applications/internet-of-things/smart-environment)
- [Smart Healthcare](https://www.semtech.com/applications/internet-of-things/smart-healthcare)
- [Smart Home](https://www.semtech.com/applications/internet-of-things/smart-home-automation)
- [Smart Industrial](https://www.semtech.com/applications/internet-of-things/smart-industrial-iot)
- [Smart Logistics](https://www.semtech.com/applications/internet-of-things/logistics-supply-chain-management)
- [Smart Utilities](https://www.semtech.com/applications/internet-of-things/smart-utilities)
- [Smart Consumer](https://www.semtech.com/applications/internet-of-things/smart-consumer)
- [Professional AV Applications](https://www.semtech.com/applications/pro-av-applications)
### Professional AV
AptoVision BlueRiver™ Technology uses commercial-off-the-shelf Ethernet networks to deliver higher performance, flexibility, and scalability to the Pro AV industry.
[Read More](https://www.semtech.com/applications/pro-av-applications)
- - [AV Over IP](https://www.semtech.com/applications/pro-av-applications/av-over-ip)
- [BYOM Video Conferencing](https://www.semtech.com/applications/pro-av-applications/byom-video-conferencing)
- [HDMI Extender](https://www.semtech.com/applications/pro-av-applications/hdmi-extension)
- [HDMI Wall Plates](https://www.semtech.com/applications/pro-av-applications/hdmi-wallplates)
- [Hybrid AV Distribution](https://www.semtech.com/applications/pro-av-applications/hybrid-av-distribution)
- [KVM Switches](https://www.semtech.com/applications/pro-av-applications/kvm-switches)
- [Multiviewers](https://www.semtech.com/applications/pro-av-applications/multiviewers)
- [Point-to-Point Matrix Switching](https://www.semtech.com/applications/pro-av-applications/point-to-point-matrix-switching)
- [Presentation Switchers](https://www.semtech.com/applications/pro-av-applications/presentation-switchers)
- [SDI Equipment](https://www.semtech.com/applications/pro-av-applications/sdi-equipment)
- [SDVoE™ Integration](https://www.semtech.com/applications/pro-av-applications/sdvoe-integration)
- [Smart Display Modules (SDM)](https://www.semtech.com/applications/pro-av-applications/smart-display-modules-sdm)
- [USB-C](https://www.semtech.com/applications/pro-av-applications/usb-c)
- [Video Walls](https://www.semtech.com/applications/pro-av-applications/video-walls)
- [Other Applications](https://www.semtech.com/applications)
### Other Applications
Award-winning LoRa Technology, ESD and surge protection, and smart control platforms for Internet of Things-enabled devices and low power, wide area network (LPWAN) infrastructure.
[Read More](https://www.semtech.com/applications)
- [Automotive](https://www.semtech.com/applications/automotive-apps)
- [Advanced Driver Assistance Systems](https://www.semtech.com/applications/automotive-apps/adas-body-electronics)
- [Automotive Battery Management Systems](https://www.semtech.com/applications/automotive-apps/automotive-battery-management-systems)
- [Automotive USB Charger](https://www.semtech.com/applications/automotive-apps/dashboard-electronics-usb-charging)
- [Infotainment Unit](https://www.semtech.com/applications/automotive-apps/navigation-infotainment)
- [Remote Keyless Entry](https://www.semtech.com/applications/automotive-apps/remote-keyless-entry)
- [Telematics Unit](https://www.semtech.com/applications/automotive-apps/telematics-unit)
- [Broadcast Video](https://www.semtech.com/applications/broadcast-video-applications)
- [Broadcast Equipment](https://www.semtech.com/applications/broadcast-video-applications/broadcast-equipment)
- [Consumer Electronics](https://www.semtech.com/applications/consumer-electronics)
- [Mobile Devices](https://www.semtech.com/applications/consumer-electronics/mobile-devices)
- [Wearables](https://www.semtech.com/applications/consumer-electronics/wearables)
- [TVs, Set Top Boxes, Monitors](https://www.semtech.com/applications/consumer-electronics/tvs-set-top-boxes-monitors)
- [Laptops, Tablets, Computers](https://www.semtech.com/applications/consumer-electronics/laptops-tablets-computers)
- [Appliances & White Goods](https://www.semtech.com/applications/consumer-electronics/appliances-white-goods)
- [Computers, Printers, Scanners](https://www.semtech.com/applications/consumer-electronics/computers-printers-scanners)
- [Industrial](https://www.semtech.com/applications/industrial-applications)
- [Medical Equipment](https://www.semtech.com/applications/industrial-applications/medical-equipment)
- [Factory Automation](https://www.semtech.com/applications/industrial-applications/factory-automation)
- [Energy, Smart Grids, Smart Metering](https://www.semtech.com/applications/industrial-applications/energy-smart-grids-smart-metering)
- [Surveillance](https://www.semtech.com/applications/industrial-applications/surveillance)
- [Test & Measurement](https://www.semtech.com/applications/industrial-applications/test-measurement)
- [Power Tools](https://www.semtech.com/applications/industrial-applications/power-tools)
- [Infrastructure](https://www.semtech.com/applications/infrastructure)
- [Data Centers](https://www.semtech.com/applications/infrastructure/enterprise-datacenters)
- [Passive Optical Networks / Fiber to the Home](https://www.semtech.com/applications/infrastructure/enterprise-passive-optical-networks-fiber-to-the-home)
- [Broadband](https://www.semtech.com/applications/infrastructure/enterprise-broadband)
- [Networking & Optical Communications](https://www.semtech.com/applications/networking-communication)
- [Broadband](https://www.semtech.com/applications/networking-communication/broadband)
- [Passive Optical Networks / Fiber to the Home](https://www.semtech.com/applications/networking-communication/passive-optical-networks)
- [ISM Networks](https://www.semtech.com/applications/networking-communication/ism-networks)
- [Wireless Infrastructure, Base Stations](https://www.semtech.com/applications/networking-communication/wireless-infrastructure-base-stations)
- [Data Centers](https://www.semtech.com/applications/networking-communication/datacenters)
- [Quality](https://www.semtech.com/quality)
- ### Quality Overview
Ethical standards drive peak customer satisfaction.
[Read More](https://www.semtech.com/quality)
- [Quality Overview](https://www.semtech.com/quality)
- [Reliability](https://www.semtech.com/quality/reliability)
- [Product Testing](https://www.semtech.com/quality/testing)
- [Material & Packaging Declarations](https://www.semtech.com/quality/declarations)
- [Quality & Failure Analysis](https://www.semtech.com/quality/analysis)
- [Search Pb(Lead)-Free/RoHS-Green](https://www.semtech.com/quality/search-pb-lead-free-rohs-green)
- [Environmental Initiatives](https://www.semtech.com/quality/environment)
- [Quality Policy](https://www.semtech.com/quality/policy)
- [Quality Certifications](https://www.semtech.com/quality/certifications)
- [IR Reflow Profiles](https://www.semtech.com/quality/reflow-profiles)
- [About](https://www.semtech.com/company)
- ### Company Overview
Since our founding in 1960 as a manufacturer of high reliability products, Semtech has grown to become a multinational technology innovator, enabling solutions that help to make the world a better place.
[Read More](https://www.semtech.com/company)
- [Company Overview](https://www.semtech.com/company)
- [Leadership](https://www.semtech.com/company/executive-leadership)
- [Corporate Citizenship (ESG)](https://www.semtech.com/company/corporate-citizenship)
- [Core Values](https://www.semtech.com/company/core-values)
- [News & Media](https://www.semtech.com/company/news-and-media)
- [Videos](https://www.semtech.com/company/videos)
- [Blog](https://blog.semtech.com)
- [Events](https://www.semtech.com/company/events)
- [Careers](https://www.semtech.com/careers)
- [Locations](https://www.semtech.com/company/locations/north-america)
- [Security](https://www.semtech.com/company/security)
- [Contact](https://www.semtech.com/company/contact)
- [Contact Us](https://www.semtech.com/company/contact/support)
1. [Home](https://www.semtech.com/)
2. [Blog](https://blog.semtech.com/)
21 December, 2021 5 min read
# Protection of IO-Link With SurgeSwitch®
Anindita Bhattacharya
## cWhat Is IO-Link?
Nowadays, we hear a catchphrase more frequently, "Industry 4.0." Industry 4.0 refers to super-fast, fault-free manufacturing, implemented via automation, precise computer-controlled robots, intelligent machines, smart technologies, and most importantly, real-time access of information through Internet of Things (IoT) technologies and massive data processing (Big Data/Cloud). A vast transformation has occurred in industrial manufacturing in the past few decades with the rapid development of automation and related technologies. In intelligent factories where machines and sensors are connected to the networks, devices communicate with each other, and computers monitor the whole network of the system. The basic idea is to capture the real-time data from all the components of the manufacturing chain and remotely access data anywhere in the factory to minimize downtime caused by faults along with the comprehensive, real-time diagnostics.
The backbone of today's smart factory of Industry 4.0 is the [IO-Link](https://io-link.com/en/Technology/what_is_IO-Link.php?thisID=76). IO-Link is a standardized, point-to-point serial communication link for data exchange between two nodes. One endpoint of a link is typically a sensor including pressure, temperature, proximity, position, and force sensors, or an actuator such as hydraulic cylinders, linear actuators, and pneumatic control valves, among others. Such devices are normally referred to as an IO-Link device. The other endpoint of the link is a IO-Link master. The IO-Link master usually has 4 to 8 ports, and each port establishes a bidirectional communication with one IO-Link device. The IO-Link master receives all the data from the devices and transmits that information to a PLC or an industrial computer via a standard Fieldbus or industrial Ethernet. The complete IO-Link system architecture is shown in Figure 1.
Figure 1. IO-Link system architecture
## EOS/ESD Protection of the IO-Link Devices
IO-Link has made the whole industrial manufacturing process stress-free and fault-free. The integrated circuits used in IO-Link transceivers work in a harsh manufacturing environment. Not only that, the IO-Link devices can be plugged in and unplugged from the IO-Link masters when required. These working conditions can cause transient voltage spikes like electrostatic discharge (ESD) events that can reach thousands of volts, potentially damaging the transceivers. Traditionally, transient voltage suppression (TVS) diodes protect IO-Link ports and transceivers from ESD threats by arresting the system-level ESD peak, thereby diverting high currents away from the port. Before going into the protection details, let us first talk about the IO-link ports.
The IO-Link devices use standard 3-wire or 4-wire connecting ports (M12 ports) called Type-A or Type B ports. The cable between the IO-Link master and the IO-Link devices can be up to 20 meters long. The pin configuration of the ports is shown in Figure 2.
Figure 2. Type A and Type B IO-Link Ports
In both the ports, 24V DC is provided at pin 1 to power the IO-Link devices. Pin 4, denoted as C/Q, carries the communication or signal information. C is used for single-drop digital communication interface (SDCI) or IO-Link mode, where the communication is bidirectional with digital inputs (DI) or digital outputs (DO). In IO-Link mode, bidirectional communication with transmission rates of 4.8kBit/s (COM1), 38.4kBit/s (COM2), and 230.4kBit/s (COM3) are possible. Q is used for standard input-output (SIO) communication. Pin 2 is optional for Type A and sometimes set by the manufacturers to connect an additional digital input or digital output signal. Otherwise, it remains not connected (NC). Pin 5 remains not connected in the Type-A port as well. The Type B port is used for IO-Link devices, requiring additional power from an independent 24V power supply. The separate power supply is connected between Pin 2 and Pin 5. Some more extensive devices, such as valve banks and other actuators, utilize an additional power supply via Pin 2 and Pin 5.
During a transient event, these four pins of the IO-Link port should endure both positive and negative polarity surges. A careful surge protection testing is required between any of the two pins of the connector. Also, the standards like IEC 61000-4-2 for ESD, IEC 61000-4-4 for burst/EFT, and IEC 61000-4-5 for surge requirements should be met while protecting the circuit. Most importantly, a compact solution is beneficial to save real estate. Circuit protection devices can be selected considering 15% of input supply tolerance. On top of that, we can consider a little more coverage. So for a 24V application like the IO-Link, a 33V protection device is suitable.
Figure 3. Clamping voltage versus Peak Pulse Current comparison
Semtech offers a wide range of protection devices for IO-Link devices and masters transceivers. The new [TDS3311P](https://www.semtech.com/products/circuit-protection/sclamp-system-protection/tds3311p) SurgeSwitch™ from Semtech's SClamp® system protection portfolio is ideally suited to safeguard the IO-Link devices and masters. SurgeSwitch does not use a conventional PN junction TVS diode for protection. Instead, it uses a surge-rated field-effect transistor (FET) as the primary protection element, which is used as a voltage-controlled switch. This technology brings substantial advantages in protecting IO-links from ESD and EOS events. One advantage worth mentioning here is the nearly constant clamping voltage across the rated peak pulse current range, as shown in Figure 3. The clamping remains stable over the operating temperature range; it does not degrade over temperature like conventional TVS diodes. Consistent performance over temperature is a critical point in selecting a protection device for an IO-Link circuit working in a rugged industrial environment. Another significant advantage is that the clamping voltage of TDS3311P is at least 30% less than the conventional TVS ESD protection devices (Figure 4).
Figure 4. Lower clamping voltage of TDS3311P
Semtech's TDS3311P is specifically designed to protect the voltage bus or data line with an operating voltage of 33V. It is rated for a high energy peak pulse current capability up to 35A (tP=8/20µs per IEC 61000-4-5). TDS3311P can be used to meet the common industrial voltage surge standard of ±1kV (RS=42Ω, CS=0.5F). It protects one IO-Link line with a minimum breakdown voltage of 36V. The maximum clamping voltage is 42V at Ipp=35A. TDS3311P provides the transient protection as per the specification in IEC 61000-4-2 (ESD) at ±30kV (Air), ±30kV (Contact). It has a dynamic resistance of only 0.20Ω (Typical). TDS3311P is available in a 6-lead DFN package with a nominal dimension of 1.6 x 1.6 x 0.55 mm.
Now let us look into a few examples of protecting the IO-Link ports. The ESD protection of 3 pins IO-Link port can be done as shown in Figure 5. TDS3311P is used as an ESD protection device from D1 to D3. For reverse polarity protection on the VBUS line, a TVS diode [µClamp™3671P](https://www.semtech.com/products/circuit-protection/esd-protection/uclamp3671p) is recommended to use. Two TDS3311P facing each other can be used for bidirectional protection. Figure 6 shows the ESD protection options of the IO-Link 4 pin port.
Figure 5. ESD protection of IO-Link device three-pin port
Figure 6. ESD protection of IO-Link device four-pin port
Similar to IO-Link devices, IO-Link master transceivers also need ESD protection. Each IO-Link master consists of 4 to 8 ports, provides point-to-point communications between IO-Link devices, and serves as a gateway to the PLC and the Fieldbus. Usually, quad transceivers are used for the connection of 4 ports. The master ports initiate communication and exchange data to and from the devices. Master ports need protection devices to meet standards like IEC 61000-4-2 for ESD immunity, IEC 61000-4-4 for burst/EFT immunity, and IEC 61000-4-5 for surge immunity. Semtech's TDS3311P can protect the master ports during transient events, as shown in Figure 7.
Figure 7. ESD protection of IO-Link Master
Semtech also offers traditional TVS diodes for IO-Link ESD and surge protection. The table below shows some conventional Semtech parts used for multi-line protection and higher voltages applications.
| **Part Name** | **Description** | **VRWM** | **IEC ESD (Air/Contact)** | **Surge (8x20µs)** | **CL(Typ)** | **Package** |
| --- | --- | --- | --- | --- | --- | --- |
| µClamp3612S | 2-Line Uni, 1-Line Bi | 33V | ±30kV/±30kV | 16A | 53pF for line-line; 108pF for line-gnd | SOT23 |
| [SDC36C\*](https://www.semtech.com/products/circuit-protection/industrial/sdc36c) | 2-Line Uni, 1-Line Bi | 33V | ±15kV/±8kV | 4A | 100pF | SOT23 |
| [µClamp3673P](https://www.semtech.com/products/circuit-protection/esd-protection/uclamp3673p) | 3-Lines Uni | 36V | ±30kV/±30kV | 18A | 25pF | DFN 3.0x1.6x0.57mm |
| [µClamp3603T](https://www.semtech.com/products/circuit-protection/esd-protection/uclamp3603t)\* | 3-Lines Uni | 36V | ±20kV/±15kV | 3.5A | 25pF | DFN 1.7x1.0x.0.4mm |
| [µClamp3671P](https://www.semtech.com/products/circuit-protection/esd-protection/uclamp3671p) | | 36V | ±30kV/±30kV | 18A | 150pF | DFN 1.5x1.0x0.5mm |
\* The TVS of [SDC36C](https://www.semtech.com/products/circuit-protection/industrial/sdc36c) and [µClamp3603T](https://www.semtech.com/products/circuit-protection/esd-protection/uclamp3603t) for IO-Link protection can be found in the Maxim reference design of [MAX14820](https://datasheets.maximintegrated.com/en/ds/MAX14820.pdf) & [MAX14827A](https://datasheets.maximintegrated.com/en/ds/MAX14827A.pdf).
### Conclusion
IO-Link is an integral part of the fourth industrial revolution (Industry 4.0) and is immensely popular due to its simplicity of use. The usage model of IO-Link ports are exposed to substantial ESD spikes. The ports must be safeguarded from the dangers of ESD threats so that the industrial manufacturing chain remains fault-free. Semtech's wide range of trusted TVS products have long been the preferred method for shielding many of the world's IO-link devices. With the introduction of Semtech's SurgeSwitch devices, significantly elevated ESD protection is now possible to ensure even more dependable performance of IO-Link communication in harsh industrial environments. Semtech's SurgeSwitch TDS3311P is ideal for safeguarding IO-Link ports – enabling a smooth, glitch-free uninterrupted user experience.
[](https://cta-redirect.hubspot.com/cta/redirect/2507363/bb838bbb-5d1b-4de3-9fd3-a6f8c68ccb30)
*Semtech®, the Semtech logo, and SClamp® are registered trademarks or service marks, and SurgeSwitch™ and µClamp™ are trademarks or service marks of Semtech Corporation or its affiliates.*
---
[Circuit Protection](https://blog.semtech.com/topic/circuit-protection) [Industrial Control](https://blog.semtech.com/topic/industrial-control) [ESG](https://blog.semtech.com/topic/esg) [uClamp®](https://blog.semtech.com/topic/uclamp) [SClamp®](https://blog.semtech.com/topic/sclamp) [TVS Diodes](https://blog.semtech.com/topic/tvs-diodes) [SurgeSwitch®](https://blog.semtech.com/topic/surgeswitch)
### Sign Up for Blog Updates
Get innovation delivered to your inbox. Sign up for our blog and stay on top of the very latest from Semtech.
### Related Blogs:
[Next-Gen Transient Voltage Protection: Exploring Semtech’s TVS Diodes in SOD-323 for Harsh Environments](https://blog.semtech.com/next-gen-transient-voltage-protection-exploring-semtechs-tvs-diodes-in-sod-323-for-harsh-environments)
May 15, 2025
[Celebrating Innovation, Earth Day and Every Day](https://blog.semtech.com/celebrating-innovation-earth-day-and-every-day)
April 21, 2022
[Automotive CAN Bus Protection](https://blog.semtech.com/automotive-can-bus-protection)
September 22, 2021
[Semtech](https://blog.semtech.com/)
- [Sierra Wireless](https://www.sierrawireless.com/)
- [LoRa](https://www.semtech.com/lora)
- [Products](https://www.semtech.com/products)
- [Technology](https://www.semtech.com/technology)
- [Design Resources](https://www.semtech.com/design-support/product-guides)
- [About Semtech](https://www.semtech.com/company)
### Quick Links
- [Parametric Search](https://www.semtech.com/design-support/parametric-search)
- [mySemtech](https://semtech.my.site.com/DP/)
- [Blogs](https://blog.semtech.com/)
- [Careers](https://www.semtech.com/careers)
- [Contact Us](https://www.semtech.com/company/contact)
Semtech is a leading global supplier of high performance analog and mixed-signal semiconductors and advanced algorithms for infrastructure, high-end consumer and industrial equipment.
- [Facebook](https://www.facebook.com/semtechcorporation)
- [Twitter](https://twitter.com/SemtechCorp)
- [YouTube](https://www.youtube.com/user/SemtechMediacenter)
- [LinkedIn](https://www.linkedin.com/company/semtech/)
[Privacy Policy](https://www.semtech.com/legal) | [Terms & Conditions](https://www.semtech.com/terms) | [Supplier Responsibility](https://www.semtech.com/quality/policy) | [Statement Against Human Trafficking and Slavery](https://www.semtech.com/uploads/quality/semtech-statement-against-human-trafficking-and-slavery.pdf) | © 2025 All Rights Reserved
- [Home](https://www.semtech.com/)
- [LoRa](https://www.semtech.com/lora)
- [LoRa Overview](https://www.semtech.com/lora)
- [LoRa(PHY)](https://www.semtech.com/lora/what-is-lora)
- [Benefits of LoRa](https://www.semtech.com/lora/why-lora)
- [LoRaWAN® Standard](https://www.semtech.com/lora/lorawan-standard)
- [Applications](https://www.semtech.com/lora/lora-applications)
- [Ecosystem](https://www.semtech.com/lora/ecosystem)
- [Products](https://www.semtech.com/lora/lora-products)
- [Resources](https://www.semtech.com/lora/resources)
- [Products](https://www.semtech.com/products)
- [Products Overview](https://www.semtech.com/products)
- [Wireless RF](https://www.semtech.com/products/wireless-rf)
- [Circuit Protection](https://www.semtech.com/products/circuit-protection)
- [Signal Integrity](https://www.semtech.com/products/signal-integrity)
- [Professional AV](https://www.semtech.com/products/professional-av)
- [PerSe™ Smart Sensing](https://www.semtech.com/products/perse-smart-sensing)
- [Broadcast Video](https://www.semtech.com/products/broadcast-video)
- [Power Management](https://www.semtech.com/products/power-management)
- [High Reliability](https://www.semtech.com/products/high-reliability)
- [Technology](https://www.semtech.com/technology)
- [Technology Overview](https://www.semtech.com/technology)
- [LoRa Wireless RF for the IoT](https://blog.semtech.com/lora)
- [Tri-Edge™ PAM4 CDR](https://www.semtech.com/technology/tri-edge)
- [BlueRiver® PLATFORM FOR SDVoE™](https://www.semtech.com/technology/blueriver)
- [BlueRiver OVERVIEW](https://www.semtech.com/technology/blueriver)
- [BlueRiver APPLICATIONS](https://www.semtech.com/technology/blueriver-applications)
- [BlueRiver VERTICAL MARKETS](https://www.semtech.com/technology/blueriver-vertical-markets)
- [SDVoE ALLIANCE™](https://www.semtech.com/technology/blueriver-sdvoe)
- [Circuit Protection](https://www.semtech.com/technology/esd-protection)
- [Circuit Protection Overview](https://www.semtech.com/technology/esd-protection)
- [Z-Platform](https://www.semtech.com/technology/z-platform)
- [Design Resources](https://www.semtech.com/design-support)
- [Design Resources Overview](https://www.semtech.com/design-support)
- [Design Resources](https://www.semtech.com/design-support/product-guides)
- [Cross Reference Search](https://www.semtech.com/design-support/cross-reference-search)
- [Parametric Search](https://www.semtech.com/design-support/parametric-search)
- [mySemtech](https://semtech.force.com/DP)
- [Quality](https://www.semtech.com/quality)
- [Quality Overview](https://www.semtech.com/quality)
- [Reliability](https://www.semtech.com/quality/reliability)
- [Product Testing](https://www.semtech.com/quality/testing)
- [Material & Packaging Declarations](https://www.semtech.com/quality/declarations)
- [Quality & Failure Analysis](https://www.semtech.com/quality/analysis)
- [Search Pb(Lead)-Free/RoHS-Green](https://www.semtech.com/quality/search-pb-lead-free-rohs-green)
- [Environmental Initiatives](https://www.semtech.com/quality/environment)
- [Quality Policy](https://www.semtech.com/quality/policy)
- [Quality Certifications](https://www.semtech.com/quality/certifications)
- [IR Reflow Profiles](https://www.semtech.com/quality/reflow-profiles)
- [About](https://www.semtech.com/company)
- [Leadership](https://www.semtech.com/company/executive-leadership)
- [Corporate Citizenship (ESG)](https://www.semtech.com/company/corporate-citizenship)
- [Core Values](https://www.semtech.com/company/core-values)
- [News & Media](https://www.semtech.com/company/news-and-media)
- [Events](https://www.semtech.com/company/events)
- [Careers](https://www.semtech.com/careers)
- [Locations](https://www.semtech.com/company/locations/north-america)
- [Security](https://www.semtech.com/company/security)
- [Contact](https://www.semtech.com/company/contact)
- More
- [Parametric Search](https://www.semtech.com/design-support/parametric-search)
- [Shop](https://www.semtech.com/shop)
- [Investors](http://investors.semtech.com/)
- [Blog](https://www.semtech.com/blog)
- [mySemtech](https://semtech.force.com/DP)
- [Contact](https://www.semtech.com/company/contact)
```json
{
"@context" : "https://schema.org",
"@type" : "BlogPosting",
"author" : {
"@type" : "Person",
"name" : "Anindita Bhattacharya",
"url" : "https://blog.semtech.com/author/anindita-bhattacharya"
},
"dateModified" : "2025-03-07T21:00:15.159Z",
"datePublished" : "2021-12-21T17:51:56.000Z",
"headline" : "Protection of IO-Link With Semtech's SurgeSwitch",
"image" : [ "https://blog.semtech.com/hubfs/Semtech_Blog_EDS_Protection_SS_IOLink%20(1).jpg" ],
"mainEntityOfPage" : {
"@id" : "https://blog.semtech.com/protection-of-io-link-with-surgeswitch",
"@type" : "WebPage"
},
"publisher" : {
"@type" : "Organization",
"logo" : {
"@type" : "ImageObject",
"url" : "https://blog.semtech.com/hubfs/Imported%20sitepage%20images/semtech-logo.svg"
},
"name" : "Semtech"
}
}
```
```json
{
"@context" : "http://schema.org",
"@type" : "BlogPosting",
"author" : {
"@type" : "Person",
"name" : "Anindita Bhattacharya"
},
"dateModified" : "March 7, 2025, 9:00:15 PM",
"datePublished" : "2021-12-21 17:51:56",
"description" : "Semtech's SurgeSwitch TDS3311P is ideal for safeguarding IO-Link ports – enabling a smooth, glitch-free uninterrupted user experience. ",
"headline" : "Protection of IO-Link With SurgeSwitch®",
"image" : {
"@type" : "ImageObject",
"url" : "https://info.semtech.com/hubfs/Semtech_Blog_EDS_Protection_SS_IOLink%20%281%29.jpg"
},
"mainEntityOfPage" : {
"@id" : "https://blog.semtech.com/protection-of-io-link-with-surgeswitch",
"@type" : "WebPage"
},
"publisher" : {
"@type" : "Organization",
"logo" : {
"@type" : "ImageObject",
"url" : "https://info.semtech.com/hubfs/Imported%20sitepage%20images/semtech-logo.svg"
},
"name" : "Semtech Corporation"
}
}
```