1SMA40CAT3G - 1SMAxxCA Series

Series: 1SMAxxCA
Obsolete: 2018 -06-30 Replaced By: SMAJ40CA Availability: Obsolete


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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.

This series will be End of Life (EOL) on December 31, 2017 and is not recommended for new designs. Replacement will be the SMAJ series.

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.


  • Working Peak Reverse Voltage Range - 10 V to 78 V
  • Standard Zener Breakdown Voltage Range - 11.7 V to 91.3 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
  • Low Profile Package
  • CASE: Void-free, transfer-molded plastic
  • FINISH: All external surfaces are corrosion resistant with readily solderable leads
  • POLARITY: None
  • Pb-Free Packages are Available
  • AEC-Q101 Qualified and PPAP Capable
  • SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements
Property (Mouseover for details) Value
Partner ECAD Models 1SMA40CAT3G
Replaced By Part Number SMAJ40CA
Polarity Bipolar
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
1SMA40CAT3G ZEN SMA TVS CLP 400W 40V RoHS No 04/20/2018 PbFree No 04/20/2018 CoC_RoHS9_1SMA40CAT3G REACH181_Declaration_1SMA40CAT3G Yes
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