Series: SZSMF4L
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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 SZSMF4L series is designed to protect sensitive systems or components from high voltage, high energy transients. It offers a fast response time, low zener impedance, high surge and excellent clamping capabilities. Because of its small size, it is ideal for use in automotive electronics applications.


  • Zener transient overvoltage suppressors
  • Working peak reverse voltage range 5 V to 78 V for unidirectional and 10 V to 78 V for bi-directional
  • Peak power: 400 watts @ 1 ms
  • Planar chip design with low leakage current performance
  • Response time is typically < 1 ns
  • ESD rating of class 3 (> 16 kV) per human body model
  • IEC-61000-4-2 ESD 30 kV(Air), 30 kV (Contact)
  • Lead orientation in tape: cathode lead to sprocket holes
  • These components are Pb-free and are RoHS compliant
  • SZ prefix for automotive and other applications requiring control change requirements; AEC−Q101 qualified and PPAP capable


TVS components are ideal for the protection of I/O Interfaces, VCC bus and other vulnerable circuits used in Automotive applications.

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