Series: SZ1SMA
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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The SZ1SMA 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 SZ1SMA series is supplied in the Littelfuse 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 and consumer applications.

Features & Benefits:

  • Zener Transient Overvoltage Suppressors
  • Working Peak Reverse Voltage Range −5V to 170V for uni-directional and 10 V to 78 V for bidirectional
  • Standard Zener Breakdown Voltage Range −11.1 V to 95.83 V for bidirectional, 6.4 V to 209 V for uni-directional
  • Peak Power − 400 W @ 1 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 Slide or Bottom Circuit Board Mounting
  • Low Profile Package
  • Pb-free means 2nd level interconnect is Pb-free and the terminal finish material is tin(Sn) (IPC/JEDEC J-STD-609A.01)
  • SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q101 Qualified and PPAP Capable
  • Recognized to UL 497B as an Isolated Loop Circuit Protector
  • RoHS-compliant and halogin-free


pdf icon ESD Protection Solutions

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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.

pdficon Unidirectional versus Bidirectional Protection

pdficon Application Hints for Transient Voltage Suppression Diode Circuits

pdficon TVS Diode SZ1SMA Datasheet

Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
SZ1SMA58CAT3G Zen TVS 400W 58V BI DO-214AC TR13 RoHS No 04/03/2018 PbFree No 04/03/2018 CoC_RoHS9_SZ1SMA58CAT3G Yes
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