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Semtech
  • LoRa®
    • LoRa® Overview

      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.

      • LoRa (PHY)
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    • 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.

      • Agriculture
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      • Industrial Control
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    • Ecosystem

      Ecosystem Overview

      LoRa is bolstered by a diverse global ecosystem of hardware manufacturers, software designers, network providers, and industry associations.

      • LoRa Alliance®
      • Featured Sensor Use Cases
      • Gateways
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    • 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.

      • LoRa Products Overview
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  • Products
    • Products Overview

      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.

      Quick Links

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    • LoRa® 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.

      • End-Nodes ICs
      • ICs for Gateways
      • LoRa Basics™ Modem & Unified Software Platform
      • Hardware Development Tools & Kits
    • 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.

      Circuit Protection Products

      • ESD Protection Diodes
      • TVS Diodes

      Interfaces

      • USB
      • HDMI
      • Antenna
      • Ethernet
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      • Automotive High Speed
      • VBUS
    • 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.

      • Data Center
      • Passive Optical Networks
      • Mobile Transport
    • 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.

      • BlueRiver®
      • USB Extension
      • Hardware Development Tools & Kits
    • 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.

      • PerSe® Connect
      • PerSe® Contact
      • PerSe® Control
      • IO Expanders
      • Hardware Development Tools & Kits
    • 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.

      • AV Interface & Protocol Conversion
      • Configurable EQ/CD
      • Cable Drivers
      • Cable Equalizers
      • Crosspoints
      • Receivers (Deserializers)
      • Reclocking
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      • Hardware Development Tools & Kits
    • 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.

      • EcoBrite LED Drivers
      • EcoSpeed DC-DC Converters
      • FemtoBuck DC-DC Regulators and Controllers
      • FemtoSwitch Load Switch ICs
      • nanoSmart LDOs
      • Neo-Iso Solid State Relays
      • Special Functions
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    • 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.

      • Managed Connectivity
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  • Technology
    • Technology Overview

      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.

      Quick Links

      • Related Applications
      • LoRa White Papers & Infographics
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    • LoRa® Wireless RF
      For The IoT

      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.

      • LoRa (PHY)
      • Benefits of LoRa
      • LoRaWAN® Standard
    • PerSe® Smart Sensing

      PerSe® Smart Sensing Overview

      Semtech's PerSe technology intelligently senses human presence for optimized connectivity and enhanced user experience.

      Quick Links

      • Infographic
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      • Products
    • Signal Integrity

      Signal Integrity Technologies

      Whether you need high-speed data center connectivity, low-latency wireless fronthaul, or efficient server connections, our FiberEdge®, DirectEdge™, Tri-Edge™, and CopperEdge™ solutions provide the signal integrity foundation for tomorrow's infrastructure challenges.

      Quick Links

      • FiberEdge® and DirectEdge™
      • CopperEdge™
      • Tri-Edge™ PAM4 CDR
    • BlueRiver
      Platform For SDVoE™

      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.

      • BlueRiver OVERVIEW
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    • Circuit 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.

      • Circuit Protection Overview
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    • Design Resources Overview

      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.

      • Product Guides
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    • IoT 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.

        • Smart Agriculture
        • Smart Buildings
        • Smart Cities
        • Smart Emergency
        • Smart Environment
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        • Smart Consumer
    • Professional 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.

        • AV Over IP
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        • Smart Display Modules (SDM)
        • USB-C
        • Video Walls
    • Other 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.

      • Automotive
        • Advanced Driver Assistance Systems
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        • Broadband
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  • Quality
    • Quality Overview

      Ethical standards drive peak customer satisfaction.

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  • About
    • Company Overview

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  1. Home
  2. Products
  3. Circuit Protection
  4. ESD Protection Diodes
Circuit Protection

ESD Protection Diodes

Semtech provides reliable system-level ESD and EMI circuit protection solutions that meet the industry requirements.

Select by CategoriesParametric Specifications

Resources

ESD protection of automotive ethernet using Semtech’s RClamp10022PWQ

VIDEO

ESD protection of automotive ethernet using…

CES 2025 - Semtech SurgeSwitch Demo protection

VIDEO

CES 2025 - Semtech SurgeSwitch Demo…

Semtech Wireless Expert to Present at TOP Conference 2025

PRESS RELEASE

Semtech Wireless Expert to Present at TOP…

Semtech Launches New Electrostatic Discharge (ESD) Protection for Automotive Ethernet

PRESS RELEASE

Semtech Launches New Electrostatic Discharge…

Series and Parallel combination of Semtech’s SurgeSwitches

VIDEO

Series and Parallel combination of Semtech's…

Integrating Effective Surge Protection to Safeguard your Products

VIDEO

Integrating Effective Surge Protection to…

Z-Platform

RELATED

Z-Platform

Circuit Protection Infographic

RELATED

Circuit Protection Infographic

HotSwitch® Infographic

RELATED

HotSwitch® Infographic

USB Type-C Solutions

RELATED

USB Type-C Solutions

SurgeSwitch™ Product Guide

RELATED

SurgeSwitch™ Product Guide

Circuit Protection Selector Guide

RELATED

Circuit Protection Selector Guide

Ethernet Protection Solutions

RELATED

Ethernet Protection Solutions

System Level Transient Voltage Protection FAQS

RELATED

System Level Transient Voltage Protection FAQS

ESD Solutions for I2C Bus Protection

RELATED

ESD Solutions for I2C Bus Protection

Gigabit Ethernet

RELATED

Gigabit Ethernet

ESD Solutions for Protecting SPI Ports

RELATED

ESD Solutions for Protecting SPI Ports

	How to Shield USB Type-C from EOS and ESD Events

RELATED

How to Shield USB Type-C from EOS and ESD Events

ESD protection of automotive ethernet using Semtech’s RClamp10022PWQ

VIDEO

ESD protection of automotive ethernet using…

CES 2025 - Semtech SurgeSwitch Demo protection

VIDEO

CES 2025 - Semtech SurgeSwitch Demo…

Series and Parallel combination of Semtech’s SurgeSwitches

VIDEO

Series and Parallel combination of Semtech's…

Integrating Effective Surge Protection to Safeguard your Products

VIDEO

Integrating Effective Surge Protection to…

Endurance Test for Semtech’s SurgeSwitch

VIDEO

Endurance Test for Semtech's SurgeSwitch

HS2950P: The Integrated Load Switch for Your Next Design

VIDEO

HS2950P: The Integrated Load Switch for Your…

Semtech Wireless Expert to Present at TOP Conference 2025

PRESS RELEASE

Semtech Wireless Expert to Present at TOP…

Semtech Launches New Electrostatic Discharge (ESD) Protection for Automotive Ethernet

PRESS RELEASE

Semtech Launches New Electrostatic Discharge…

Semtech Releases New Surge Protection Product to Safeguard Electronics

PRESS RELEASE

Semtech Releases New Surge Protection Product…

Semtech Introduces the HotSwitch® Platform for Superior System Protection of Electronic Systems Against Transient and Steady-State Fault Conditions for Industrial, Telecom and Consumer Applications

PRESS RELEASE

Semtech Introduces the HotSwitch® Platform…

Semtech Unveils SurgeSwitch™ System Transient Protection Product Line, Offering Compelling Performance Advantages Over Conventional TVS Devices

PRESS RELEASE

Semtech Unveils SurgeSwitch™ System…

Semtech Announces EClamp® Device To Solve Challenging EMC Immunity Requirements

PRESS RELEASE

Semtech Announces EClamp® Device To Solve…

SM712

APPLICATION NOTE

TVS Power Derating Versus Temperature

SDC36

APPLICATION NOTE

TVS Diode Selection

SD24C

APPLICATION NOTE

ESD threat to semiconductor devices

SMDA12

APPLICATION NOTE

Sources of Transients: Electrostatic Discharge

RCLAMP2451P

APPLICATION NOTE

Unidirectional and Bidirectional operation of a…

RCLAMP0521PA

APPLICATION NOTE

What Are TVS Diodes

TDS2211P

APPLICATION NOTE

Sources of Transients: Lightning

TDS3311P

APPLICATION NOTE

Sources of Transients: Lightning

TDS5801P

APPLICATION NOTE

Sources of Transients: Lightning

TDS4001P

APPLICATION NOTE

Sources of Transients: Lightning

SL24

APPLICATION NOTE

TVS Peak Pulse Power vs. Pulse Duration

LC03-3.3

APPLICATION NOTE

TVS Peak Pulse Power vs. Pulse Duration

SM712

APPLICATION NOTE

TVS Peak Pulse Power vs. Pulse Duration

SL12

APPLICATION NOTE

TVS Peak Pulse Power vs. Pulse Duration

LCDA12C-1

APPLICATION NOTE

TVS Peak Pulse Power vs. Pulse Duration

SL15

APPLICATION NOTE

TVS Peak Pulse Power vs. Pulse Duration

SL05

APPLICATION NOTE

TVS Peak Pulse Power vs. Pulse Duration

RCLAMP4021ZA

APPLICATION NOTE

ESD Protection of USB Type-C

RCLAMP3371ZC

APPLICATION NOTE

ESD Protection of USB Type-C

Security camera transmitting live video feed to smartphone showing dining room surveillance via Semtech LR2021 wireless technology

For many years, wireless communication technology has faced a trade-off between achieving long transmission ranges and supporting high data rates. Semtech’s LR2021, the first radio in the LoRa Plus™ line, incorporates 4th Generation LoRa® IP with an innovative Fast Long-Range Communication (FLRC) modulation, enabling data rates of up to 2.6 Mbps on both sub-GHz and 2.4 GHz frequency bands. This advanced modulation supports diverse applications, including reliable image transfer over extensive distances with strong penetration through materials, all while maintaining the low power requirements necessary for battery-powered devices. 

BLOG

Fast Long-Range Communication: Semtech® LR2021…
Digital network connections overlaying illuminated city skyline representing Semtech's 2000s expansion into telecommunications and urban commercial markets

As Semtech entered the new millennium it built upon the successful transformation achieved during the 1990s. The 2000s represented a period of technology refinement, market expansion and strategic positioning that further cemented Semtech's status as a leading analog and mixed-signal semiconductor provider.

BLOG

Semtech in the 2000s: Consolidating Growth and…
LoRa smart city connectivity visualization showing illuminated urban skyline with network connection lines and IoT nodes overlaying the cityscape, demonstrating LoRa's role in intelligent Internet of Things infrastructure

IOTE Shenzhen 2025 was a major success, drawing 70,000 participants to this year's show. Semtech's presence became a focal point for next-generation LoRa® technology, featuring live demonstrations, executive presentations and strategic partnership announcements. The three-day event reinforced the leading position of LoRa technology in intelligent Internet of Things(IoT) connectivity throughout China and internationally. 

BLOG

IOTE Shenzhen 2025: Semtech Showcases the Future…
Central processing unit and semiconductor components on circuit board illustrating Semtech's 1990s diversification into commercial electronics and computing markets

The 1990s marked a transformative decade for Semtech as the company executed a strategic pivot from its historical dependence on military and aerospace markets toward broader commercial opportunities. This period of reinvention established Semtech as a significant player in the protection technology and analog semiconductor landscape, creating the foundation for its future as a diversified technology leader. 

BLOG

Semtech Corporation in the 1990s: Strategic…
Aerial view of a large solar panel farm with wind turbines in the background, overlaid with glowing blue digital network connections and data nodes representing LoRa/LoRaWAN IoT connectivity and smart monitoring technology for renewable energy infrastructure.

Over the past decade, solar photovoltaic technology has evolved from a niche market to becoming the world's leading clean energy source. As installations scale, operators face rising costs, technician shortages and complex monitoring demands. With the O&M market projected to reach $9.48B by 2025, the employers report workforce gaps and over half seek cost reductions. Yet, fewer than 1% of systems have real-time monitoring in place. To meet these challenges, the industry must embrace predictive maintenance and smarter infrastructure enabled by easy to install and maintain, long-range communication technologies like LoRa®. 

BLOG

LoRa® Technology Powers the Future of Renewable…
Detailed view of telecommunications cables with copper wiring and protective shielding for semiconductor applications

The 1980s represented a pivotal decade for Semtech, marked by challenges, dramatic leadership changes and a remarkable turnaround that set the company on a path toward future success. This period transformed Semtech into a resilient enterprise poised for diversification and growth.

BLOG

Semtech in the 1980s: Crisis, Resilience and…

Frequently Asked Questions

An ESD diode is a fast-acting protection device designed to clamp electrostatic discharges, preventing damage to sensitive electronics. It features low clamping voltage, low capacitance for high-speed signal integrity, minimal leakage current, and comes in compact packages for space-constrained designs.
  • VRWM (Reverse Stand-Off Voltage)
  • Clamping voltage (Vc)
  • Peak pulse current ratings (e.g., 8/20 µs)
  • Capacitance (critical for high-speed lines)
Match the diode's VRWM slightly above your normal line voltage, ensure clamp and capacitance specs align with your system, and consider packaging (e.g. low-profile, array options).
In general, choose unidirectional for DC power lines.
In general, choose bidirectional for data/communication lines or AC interfaces.

Additional FAQs →

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