Hot Stock: SL1021B250R

The SL1021B250R from Littelfuse is a high-performance gas discharge tube (GDT) designed to deliver exceptional surge protection in broadband, telecom, and networking equipment. 

Rated for 250V breakdown and tested to handle surge currents up to 20kA (8/20μs pulse), this device is purpose-built to guard against electrical transients caused by lightning strikes, switching operations, and electrostatic discharge. Let us dive into the key features and applications of this GDT. 

Key Features 

High Surge Capability 

The SL1021B250R can safely divert high-energy surges—tested at 20,000 amps (8/20µs pulse)—without damage. This makes this GDT an ideal choice for protecting sensitive electronics in outdoor or surge-prone environments. 

Ultra-Low Capacitance 

Its extremely low capacitance (<1.5pF) ensures minimal signal interference, making it perfectly suited for broadband, xDSL, and high-frequency data lines. 

Fast Response to Transients 

Optimised for transients in the 100V/µs to 1kV/µs range, the SL1021B250R responds rapidly to voltage spikes, reducing the risk of downstream damage in network and telecom applications. 

Low Insertion Loss and High Reliability 

With its robust ceramic body and optimised internal geometry, this GDT ensures minimal insertion loss and long-term reliability, even under repeated surge exposure. 

Compliant and Safe 

The SL1021B250R is RoHS compliant and available with an optional thermal fail-safe for added protection. The device also complies with IEC 61000-4-5 surge standards and ITU-T Rec. K.12, making it a trusted choice for global telecom designs. 

Applications 

The SL1021B250R is widely used to protect sensitive communication equipment from destructive transient voltages. Common applications include: 

• Broadband and xDSL equipment 

• Telecom network interfaces 

• Satellite and CATV systems 

• ADSL and modems 

• General surge protection 

Why Choose Component Sense? 

The SL1021B250R GDT from Littelfuse is designed for telecom surge protection, featuring ultra-low capacitance. At Component Sense, we specialise in the fast, reliable, and sustainable supply of high-demand components like the SL1021B250R. Here is why procurement professionals choose us as their trusted sourcing partner: 

• We maintain real-time stock of over 150,000 fully traceable electronic components, including Littelfuse’s SL1021B250R. Our up-to-date inventory ensures quick sourcing for your bill of materials (BOM) and helps eliminate sourcing delays. Explore our full inventory here.  

• We protect your supply chain from counterfeit components. Every part we supply is brand-new, unused, and fully traceable back to the original manufacturer. Not to mention, we only sell stock from tier-one OEM and EMS partners with a high level of security built into their supply chain.  

• Our industry-leading inspection process, developed in collaboration with leading Scottish universities, ensures each component is 100% counterfeit-free. All components are backed by a 12-month warranty for peace of mind. 

• We specialise in untouched excess and obsolete (E&O) stock, extending the lifecycle of high-quality components and reducing electronic waste. To further our sustainability goals, we plant two trees for every order, contributing to carbon offsetting for both our buyer and seller and global reforestation. 

• With over 23 years of experience in the electronics distribution industry, we offer expert support, rapid response, and dependable service. Most quote requests are answered within 20 minutes, and we offer same-day international shipping on most in-stock parts.  Our 95% on-time delivery rate helps you keep your supply chain moving and projects on schedule. 

  
   

When sourcing electronic parts like the SL1021B250R GDT, trust Component Sense for authenticity, sustainable procurement, and industry-leading service. Click below to order the SL1021B250R and experience our friendly customer service.