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Zinc Oxide Varistor for Overvoltage Protection

This is mainly used for voltage clamping when the circuit is subjected to overvoltage and absorbs excess current to protect sensitive devices.

  • Item No :

    Overvoltage-protection style varistor
  • Size / Dimension :

    7.5-56 mm
  • Varistor voltage :

    16-1200 V
  • Varistor voltage tolerance :

    K:±10%, L:±15%
  • Insulation resistance :

    ≥500 MΩ
  • Temperature Range :

    -40~85℃
  • Lead Style :

    straight,spire
  • Response time :

    <25 ns
  • Rated Power :

    0.01-1.4 W

Zinc Oxide Varistor for Overvoltage Protection

Product Description

Varistor is a resistive device with nonlinear volt-ampere characteristics. It is mainly used for voltage clamping when the circuit is subjected to overvoltage and absorbs excess current to protect sensitive devices.

 

Product Features

  1.  Application scope: Overvoltage protection and surge absorption for various electronic equipment.
  2.  Features:

    ● Small size, large flow capacity and energy tolerance.

    ●Epoxy resin insulation encapsulation.

    ●Varistor voltage temperature coefficient: -0.5%/℃.

    ●Chip diameter: 5, 7, 10, 14, 20, 25, 32, 40, 50mm.

 

Product Specifications

       

 

No(mm) Dmax Tmax Lmin F±1 d±0.1
0.5D 7.5 6 20 5

0.6

07D 9 6 20 5 0.6
10D 14 8 25 7.5 0.8
14D 17 12 25 7.5 0.8
20D 25 12 25 10 1.0
25D 30 12 25 12.5 1.0

 

 

No(mm) Dmax Tmax Lmin F±1 W±0.5  t±0.1  M±0.5  X±0.3
32D 39 14.5 25 25 7.0 0.5 3.8 3.4
40D 46 15 25 25 7.0 0.5 3.8 3.4
50D 56 16 16.5 25 8.0 0.5 3.8 3.4

 

 

Why Choose us?

20+ Years Industry Experience

Founded in 2002. Four self-built factories.

Shiheng Electronics delivers high-precision NTC thermistors engineered for surge suppression, fast temperature sensing, and long-term reliability. Our products are built for demanding environments — from EV battery packs and HVAC systems to industrial power supplies and consumer electronics.

With in-house manufacturing and custom design capabilities, we provide tailored thermal solutions that help you prevent failures, extend product life, and improve system efficiency. Partner with Shiheng for components that perform when it matters most.

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Shiheng has been focusing on the R&D and production of thermistors for 23 years, focusing on customizing them for you.
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