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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 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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    • Ecosystem

      Ecosystem Overview

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

      • LoRa Alliance®
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      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.

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    • 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.

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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
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      • LoRa Basics™ Modem & LoRa USP™
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    • 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

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    • 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
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    • 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.

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    • Smart Sensing

      Products Overview

      Intelligent sensing solutions that transform human-machine interaction. Semtech's Smart Sensing portfolio delivers ultra-low power proximity detection, precision force measurement, and interface control for mobile, automotive, wearables, and industrial applications.

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    • 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
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      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
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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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    • 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™
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    • 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
      • Z-Platform
  • Design Resources
    • 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.

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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.

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    • 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.

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    • 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
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  • Quality
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  • About
    • Company Overview

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  1. Home
  2. Products
  3. Circuit Protection
  4. RS-485
Circuit Protection

RS-485

Semtech makes highly differentiated TVS protection to safeguard RS-485 ports from the most harsh electrical conditions.
Circuit Protection - ESD TVS

Total parts: Package Package Size (mm) Configuration Feature Number of Lines VRWM(V) Cj (pF) IPP (A) VClamp (V) VBR(V) VESD Contact (kv) VESD Air (kv) Working
Voltage
Interface
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  • 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

    One-Channel Hub: A Compact LoRaWAN® Access Point for Cost-Effective Internet of Things (IoT)

    Semtech’s One-Channel Hub reference design enables affordable LoRaWAN® sensor networks, meeting the needs of smart homes and small setups with only a few connected devices. This solution suits homeowners, Internet Service Providers expanding connectivity, insurance companies managing risks, property managers seeking better control, and security system operators developing cost-effective home options. 

    BLOG

    One-Channel Hub: A Compact LoRaWAN® Access Point…
    Industrial automation system diagram showing 24V DC power distribution to sensors, controllers, and actuators with 3-phase AC equipment generating electrical disturbances

    Protecting the 24-Volt Direct Current (DC) System – The Backbone of Industry 4.0

    Industrial automation is rapidly evolving from rigid, standalone systems into interconnected, intelligent networks that define Industry 4.0. Modern industries are not just automated - they’re hyperconnected with thousands of sensors, controllers and many sophisticated devices.  The fusion of digital technologies — particularly the Industrial Internet of Things (IIoT), with its sensor-generated real-time data streams — powers this transformation by facilitating predictive maintenance and dramatically cutting unexpected equipment failures. In the world of modern manufacturing, where precision sensors, complex logic controllers and interconnected devices drive production, there is one constant across multiple architectures – the power source which is a 24-volt direct current (DC) system.

    BLOG

    Advanced Surge Protection for Industrial 24V DC…
    lluminated city skyline at night with glowing blue LoRaWAN network connection lines and wireless signal indicators visualizing IoT connectivity across urban landscape.

    The Internet of Things (IoT) landscape is witnessing a significant milestone. LoRaWAN®, the low-power wide-area network (LPWAN) standard protocol that has quietly powered smart city initiatives, industrial IoT applications and environmental monitoring projects worldwide, has crossed a threshold that signals its arrival as a mainstream connectivity solution.

    BLOG

    LoRaWAN® Reaches Critical Mass: 125 Million…
    Digital water wave with LoRaWAN® network connectivity visualization showing IoT mesh network for smart water management.

    A Growing Crisis Demands Smart Solutions 

    Spain loses 25% of its water to leaks1. Portugal loses 33%2. Meanwhile, Catalonia's reservoirs have reached historic lows and Portugal's Algarve region has imposed severe restrictions with dams at just 20% capacity.The Iberian Peninsula faces a growing water crisis.  

    Spain has emerged as a significant adopter of Advanced Metering Infrastructure with LoRaWAN® as the leading choice of IoT connectivity, with over 647,000 LoRaWAN-enabled water meters already deployed—and the European Union (EU) is backing expansion through its Strategic Projects for Economic Recovery and Transformation (PERTE) funding program. 

    BLOG

    The Smart Water Revolution: How LoRaWAN® is…
    wM-Bus and LoRaWAN® Demo with LR1121 and LR2021

    The evolution of smart metering has transformed how utilities collect and manage metering and consumption data. At the heart of this digital transformation of utilities lies the wireless M-Bus (wM-Bus) protocol, a wireless communication protocol for automated meter reading that has been adopted for over 20 years through the standard defined by the European Normalization Committee (CEN) under the standard series EN13757, encompassing Europe and beyond. In this blog post, we'll explore our recent demo featuring the Semtech LR1121 and LR2021, and discuss how enabling the dual connectivity for wM-Bus and LoRaWAN® is today’s demand of utilities for Smart Metering. 

    BLOG

    wM-Bus and LoRaWAN® Demo with LR1121 and LR2021
    Two engineers collaborating in modern data center with server racks, representing Semtech's 2010s innovations in low-power networking, surge protection, and optical communication technologies

    The 2010s marked a defining decade for Semtech as the company accelerated its transformation into a connectivity and sensing powerhouse. Building on the foundation established in previous decades, Semtech made strategic moves that positioned it at the forefront of several high-growth technology markets, including the Internet of Things (IoT), advanced surge protection and high-speed optical networking. 

    BLOG

    Semtech in the 2010s: Low-Power Networking, Surge…

    Frequently Asked Questions

    Transient Voltage Suppression diodes or TVS diodes serve as circuit protection elements that provide protection for ICs against multiple disturbances such as electrostatic discharge (ESD), electrical fast transients (EFT), arc effects, inductive switching, and lightning-induced surges.
    A TVS diode and a Zener diode are both semiconductor devices designed to protect circuits by regulating voltages. However, TVS diodes and Zener diodes are not the same. They serve different purposes and have different characteristics.
    Zener diodes are designed for steady voltage regulation and provide precise voltage references with lower power handling and slower response times. TVS diodes are built for surge protection with larger junctions that absorb high-energy transients and respond in picoseconds to protect circuits from ESD, lightning, and voltage spikes.
    The peak pulse current (Ipp) is the maximum current that a TVS diode can safely handle during a transient event without being damaged. It represents the diode's current-handling capacity when it's actively conducting and clamping a voltage spike.
    For a VBus protection, surge rating and clamping voltages are important to consider

    Additional FAQs →

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