---
title: "Next-Gen Transient Voltage Protection: Exploring Semtech’s TVS Diodes in SOD-323 for Harsh Environments"
description: Explore how Semtech's advanced TVS diodes in SOD-323 packages offer superior protection for industrial and telecom applications, ensuring signal integrity and high surge capability.
image: https://blog.semtech.com/hubfs/AMW%26SIP-TVS-BLOG-RClampxx01_21H%20Parts%20in%20SOD-323%20Package-1400x600%20(1).jpg
---
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- [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)
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15 May, 2025 5 min read
# Next-Gen Transient Voltage Protection: Exploring Semtech’s TVS Diodes in SOD-323 for Harsh Environments
Anindita Bhattacharya
In modern telecommunications and industrial automation systems, equipment is frequently deployed in challenging environments, exposing it to voltage transients that can originate from sources such as motor switching, power line fluctuations, indirect lightning strikes, electrostatic buildup, and human-induced Electrostatic Discharge (ESD)) events. These transients pose significant risks, ranging from data corruption to catastrophic system failures, leading to costly downtime and repairs. As industrial and telecom systems become increasingly interconnected, safeguarding sensitive electronics from ESD and other transient voltage events is crucial. Transient Voltage Suppression (TVS) diodes provide a robust first line of defense by rapidly diverting excess energy to ground, as illustrated in Figure 1, with sub-nanosecond response times to clamp voltage spikes and protect critical components.
### 
### Basic requirements of protection in modern industrial and telecom applications
**Low capacitance**
For high-speed applications in telecommunications and industrial control, one of the important parameters in a TVS diode is low capacitance. Low capacitance TVS diodes are crucial to maintain signal integrity while offering protection against electrical overstress (EOS) events, including ESD, EFT, and voltage surges. These low capacitance TVS diodes offer transient voltage protection without distorting incoming and outgoing signals, thus without significantly affecting signal performance.
**High surge capability**
The second important parameter required in these applications is high surge current capability. Deployed at vulnerable interface points such as I/O ports, bus connections, and power entry modules, these devices are expected to withstand high surge currents while clamping transient voltages well below component damage thresholds. Their compliance with rigorous surge standards like IEC 61000-4-5 and ESD standards like IEC 61000-4-2 makes them indispensable in harsh industrial settings where electrical noise, lightning-induced surges, and equipment-generated ESD pose constant threats to sensitive microcontrollers, ASICs, and communication interfaces that form the backbone of modern industrial control systems and telecommunications networks.
**Selection of package**
The performance and reliability of TVS diodes heavily depend on the choice of semiconductor packages, which must balance power handling, thermal dissipation, and form factor. Semiconductor packaging is the critical interface between integrated circuit “dies” and their electronic environments, providing essential protection from mechanical, environmental, and electrostatic threats while serving as the testing interface. These packages must excel across physical, electrical, thermal, and mechanical domains while meeting strict reliability standards and cost targets. For TVS diodes used in ESD protection, package selection significantly impacts performance, with options including Dual Flat No-lead (DFN), Small Outline Diode (SOD), Small Outline Integrated Circuit (SOIC), Small Outline Transistor (SOT), and Surface Mount A/B/C (SMA/B/C) packages—each optimized for specific application requirements, power handling capabilities, and space constraints, making package selection a crucial consideration for system reliability and performance.
Semtech's specialized portfolio of low-capacitance, high-surge TVS diodes in the SOD-323 package format addresses these requirements specifically for industrial and telecommunications applications, offering superior protection solutions within compact design parameters.
### Semtech Introduces Advanced Low-Capacitance high surge TVS diodes in SOD-323 packages
Semtech Corporation has expanded its [TVS diodes portfolio](https://www.semtech.com/products/circuit-protection) shown in Figure 2, with the launch of the RClampxx01H and RClampxx21H series. Both the series offer multiple working voltage options from 3.3V to 36V providing comprehensive protection for interfaces ranging from GPIO to USB 2.0, audio ports, VBus lines and Ethernet connections. With capacitance values ranging from as low as 1.7pF to 3.6pF typically, these devices maintain signal integrity on high-speed communication lines. Each part protects one high-speed data or power line.
*Figure 2. Semtech offerings of TVS diodes in SOD-323 package*
Engineered in a 2.5mm × 1.3mm SOD-323 package with a large cross-sectional area, these RClamp TVS diodes offer peak pulse currents from 14A to 36A (8/20μs waveform), providing ample protection against surge events (Figure 2). Available in both unidirectional and bidirectional configurations, the series fully complies with IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT) standards. These parts offer desirable characteristics for board-level protection, including low operating voltage, no device degradation, and fast response time. The peak pulse current vs clamping voltage waveforms is shown in Figure 3.
 *Figure 3. Peak pulse current vs clamping voltage waveforms *
Table 1 lists the specifications of [Semtech’s low capacitance](https://www.semtech.com/products/circuit-protection/low-capacitance), high surge TVS diodes in SOD-323 packages. Each voltage option in Table 1 has a unidirectional and a bi-directional solution. The low capacitance values shown in Table 1 make these components particularly valuable for high-frequency applications where engineers can implement robust transient protection without compromising signal quality or high-speed data transmission performance. At the same time, these parts can protect electronic circuits from dangerous ESD, EFT and surges as well. Figure 4 lists several applications where these RClampxx01H and RClampxx21H series parts can be used to protect them from transient voltage conditions.
| Part number | Configuration | VRWM | Surge Rating (8x20µs) | VBR (Min) | VCLAMP (Max) (8x20µs) | Capacitance (Typical) | ESD Rating Contact/Air | Package |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| [RClamp03301H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp03301h) | Unidirectional | 3.3V | 36A | 6.5V | 15.7V | 3.6pF | ±30kV/±30kV | SOD-323 |
| [RClamp03321H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp03321h) | Bidirectional | 3.3V | 27A | 7.0V | 22.5V | 1.9pF | ±30kV/±30kV | SOD-323 |
| [RClamp0501H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp0501h) | Unidirectional | 5.0V | 32A | 6.5V | 15.5V | 3.6pF | ±30kV/±30kV | SOD-323 |
| [RClamp0521H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp0501h) | Bidirectional | 5.0V | 24A | 7.0V | 21.5V | 1.9pF | ±30kV/±30kV | SOD-323 |
| [RClamp0801H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp0801h) | Unidirectional | 8.0V | 30A | 9.5V | 17.5V | 3.3pF | ±30kV/±30kV | SOD-323 |
| [RClamp0821H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp0801h) | Bidirectional | 8.0V | 30A | 10.5V | 23.5V | 1.9pF | ±30kV/±30kV | SOD-323 |
| [RClamp1201H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp1201h) | Unidirectional | 12.0V | 35A | 14.5V | 25.7V | 3.3pF | ±30kV/±30kV | SOD-323 |
| [RClamp1221H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp1201h) | Bidirectional | 12.0V | 35A | 14.5V | 34.0V | 1.7pF | ±30kV/±30kV | SOD-323 |
| [RClamp1501H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp1501h) | Unidirectional | 15.0V | 34A | 16.0V | 28.0V | 3.1pF | ±30kV/±30kV | SOD-323 |
| [RClamp1521H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp1521h) | Bidirectional | 15.0V | 34A | 17.0V | 35.0V | 1.8pF | ±30kV/±30kV | SOD-323 |
| [RClamp2401H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp2401h) | Unidirectional | 24.0V | 24A | 26.0V | 46.0V | 3.2pF | ±30kV/±30kV | SOD-323 |
| [RClamp2421H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp2421h) | Bidirectional | 24.0V | 24A | 27.0V | 50.5V | 1.8pF | ±30kV/±30kV | SOD-323 |
| [RClamp3601H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp3601h) | Unidirectional | 36.0V | 14A | 37.0V | 59.0V | 3.3pF | ±30kV/±30kV | SOD-323 |
| [RClamp3621H](https://www.semtech.com/products/circuit-protection/low-capacitance/rclamp3621h) | Bidirectional | 36.0V | 15A | 38.0V | 65.0V | 1.8pF | ±30kV/±30kV | SOD-323 |
*Table 1. Specification of RClampxx01H/21H TVS diodes in SOD-323 package *
The low capacitance values shown in Table 1 make these components particularly valuable for high-frequency applications where engineers can implement robust transient protection without compromising signal quality or high-speed data transmission performance. At the same time, these parts can protect electronic circuits from dangerous ESD, EFT and surges as well.
### Applications of RClampxx01H & RClampxx21H TVS diodes
The RClampxx01H and RClampxx21H series TVS diodes from Semtech, housed in the SOD-323 package, provide versatile solutions for transient voltage protection across a wide range of applications, as depicted in Figure 4. These TVS diodes are ideal for safeguarding high-speed data interfaces such as USB 2.0, RS-232 and Ethernet connections in telecommunications equipment, ensuring signal integrity with their low capacitance (1.7–3.6 pF) while protecting against surges up to 36A (8/20 µs). In industrial automation, they can protect proximity sensors, I2C bus extenders, and keyboards in control systems, shielding sensitive microcontrollers from EFT and voltage spikes. In each case, the TVS diodes are strategically placed at the interface between external connectors and internal circuitry to clamp voltage spikes and divert surge energy away from critical components. This ensures the continued reliability of devices operating in industrial and telecommunication environments where exposure to ESD, EFT, and surges is common. Additionally, they are well-suited for VBus lines in power delivery systems, offering robust protection against overvoltage events in both consumer and industrial devices. Figure 4 showcases implementation examples for Semtech's RClampxx01H and RClampxx21H TVS diode series, though their protective capabilities extend far beyond these illustrated scenarios. These versatile components provide robust transient voltage protection across numerous additional applications in both industrial and telecommunications environments.
*Figure 4. Application diagrams of RClampxx01H and RClampxx21H parts *
### Conclusion
As electronic systems in industrial and telecommunications environments face increasingly complex transient voltage threats, Semtech's RClampxx01H and RClampxx21H series in SOD-323 packages represent a significant advancement in circuit protection technology. These TVS diodes strike an optimal balance between the competing requirements of modern electronics: compact size, low capacitance for signal integrity, and robust surge handling capability. As industrial systems become more interconnected and telecommunications infrastructure continues to evolve, these compact yet powerful protection devices will play an increasingly vital role in safeguarding sensitive electronics from the transient voltage threats that could otherwise lead to costly downtime and repairs. By implementing Semtech's SOD-323 packaged TVS diodes at vulnerable interface points, engineers can deliver more reliable, resilient systems without compromising on form factor or signal performance—a critical advantage in today's electronic designs.
To know more about these products, visit [www.semtech.com](http://semtech.com)
*Semtech®, and the Semtech logo, are registered trademarks or service marks of Semtech Corporation or its affiliates. Other product or service names mentioned herein may be the trademarks of their respective owners. *
---
[Circuit Protection](https://blog.semtech.com/topic/circuit-protection) [TVS Diodes](https://blog.semtech.com/topic/tvs-diodes)
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