SZ1SMA58AT3G - SZ1SMA Series

Series: SZ1SMA
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The SMA series is designed to protect voltage sensitive components from high voltage, high energy transients. They have excellent clamping capability, high surge capability, low zener impedance and fast response time. The SMA series is supplied in Littelfuse's exclusive, cost-effective, highly reliable package and is ideally suited for use in communication systems, automotive, numerical controls, process controls, medical equipment, business machines, power supplies and many other industrial/consumer applications.


  • Reverse Stand-Off Voltage Range: 5.0-70 V
  • Peak Power -- 400 Watts @ 1.0 ms
  • ESD Rating of Class 3 (>16 kV) per Human Body Model
  • Response Time is Typically < 1 ns
  • Flat Handling Surface for Accurate Placement
  • Package Design for Top Side or Bottom Circuit Board Mounting
  • Available in Tape and Reel
  • Low Profile Package
  • CASE: Void-free, transfer-molded plastic
  • FINISH: All external surfaces are corrosion resistant with readily solderable leads
  • POLARITY: Cathode indicated by molded polarity notch
  • Pb-Free Packages are Available
  • SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements
  • AEC-Q101 Qualified and PPAP Capable

pdf icon ESD Protection Solutions

pdf icon xEV power train

pdf icon Application Hints for Transient Voltage Suppression Diode Circuits

pdf icon Unidirectional versus Bidirectional Protection

pdf icon Automotive Electronics Applications Guide

This guide provides a summary of key circuit protection consideration factors, descriptions of the technologies Littelfuse offers, and product selection tables. It is designed to help you quickly find a protection solution appropriate to your application.

Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
SZ1SMA58AT3G Zener Transient Voltage Suppressor 58 V 400 Watt RoHS No 10/29/2017 PbFree No 10/29/2017 CoC_RoHS9_SZ1SMA58AT3G_02-28-2018 REACH191_Declaration_with_Pb_SZ1SMA58AT3G_09-18-2018 Yes
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