20D220K MOV Varistor 22V

20D220K MOV varistor (22V), also known as VDR-20D220K, is designed for low voltage surge protection in electronic circuits where stable clamping performance and fast response are required.

It is typically used in DC power lines, signal interfaces and communication circuits to protect against transient overvoltage caused by electrostatic discharge (ESD), switching spikes and power fluctuations.

Compared with ultra-low voltage MOVs, 20D220K provides a higher voltage margin, making it suitable for applications requiring improved tolerance while still maintaining fast response characteristics.

The 20mm disc structure ensures consistent electrical performance and enhanced durability under repetitive surge conditions.

Key Electrical Characteristics:

Varistor Voltage (1mA): 22V ±10%  

Maximum Continuous Voltage: 14VAC / 18VDC  

Maximum Clamping Voltage: approx. 43V  

Peak Surge Current (8/20μs): 2kA  

Maximum Energy (2ms): 25J  

Capacitance (1kHz): approx. 7000pF  

Application Focus:

Low voltage DC power protection  

Signal line and interface protection  

Communication equipment  

Consumer electronics  

Control circuits  

Design Tips:

- Select MOV voltage slightly above the circuit operating voltage  

- Ensure compatibility with sensitive components in low voltage applications  

- Consider TVS diodes for ultra-fast response requirements  

Related MOV Varistor Models:

20D361K MOV Varistor

20D471K MOV Varistor

20D511K MOV Varistor

20D Series 20mm MOV Varistors

Replacement and Cross Reference

S20K14 (TDK EPCOS)  

B72220S0140K101 (TDK EPCOS)  

20D220K offers comparable electrical characteristics and can be used as an alternative to the above models in low voltage protection applications.

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