20D180K MOV Varistor 18V

20D180K MOV varistor (18V), also known as VDR-20D180K, is designed for low voltage surge protection in sensitive electronic circuits where fast response and reliable clamping are essential.

It is commonly used in DC power lines, signal interfaces and electronic control systems to protect against transient overvoltage caused by electrostatic discharge (ESD), switching spikes and unstable power conditions.

Compared with higher voltage MOV varistors, 20D180K provides lower clamping voltage and faster response, making it suitable for protecting low voltage components and precision circuits.

The 20mm disc design ensures stable electrical performance and enhanced durability under repetitive surge conditions.

Key Electrical Characteristics:

Varistor Voltage (1mA): 18V ±10%  

Maximum Continuous Voltage: 14VAC / 18VDC  

Maximum Clamping Voltage: approx. 36V  

Peak Surge Current (8/20μs): 2kA  

Maximum Energy (2ms): 20J  

Capacitance (1kHz): approx. 8000pF  

Application Focus:

Low voltage DC protection  

Signal line protection  

Communication equipment  

Consumer electronics  

Control circuits  

Design Tips:

- Select MOV voltage slightly above the normal operating voltage  

- Ensure compatibility with sensitive components in low voltage circuits  

- Consider TVS diodes where ultra-fast response is required  

Related MOV Varistor Models:

20D361K MOV Varistor

20D391K MOV Varistor

20D431K MOV Varistor

20D Series 20mm MOV Varistors

Replacement and Cross Reference

S20K11 (TDK EPCOS)  

B72220S0110K101 (TDK EPCOS)  

20D180K offers comparable electrical characteristics and can be used as an alternative to the above models in low voltage protection applications.

All trademarks, brand names and part numbers mentioned are the property of their respective owners. They are used for reference and comparison purposes only and do not imply any affiliation or endorsement.

For datasheet, quotation or sample request:

Email: sales@huaandz.com  

WhatsApp: +86-134-2790-5674