20D270K MOV Varistor 27V

20D270K MOV varistor (27V), also known as VDR-20D270K, is designed for low voltage surge protection in electronic circuits, power supplies and communication systems where stable clamping performance and fast response are required.

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

Compared with lower voltage MOV varistors, 20D270K provides a higher operating voltage margin, making it suitable for applications requiring improved tolerance while maintaining reliable protection performance.

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

Key Electrical Characteristics:

Varistor Voltage (1mA): 27V ±10%  

Maximum Continuous Voltage: 17VAC / 22VDC  

Maximum Clamping Voltage: approx. 53V  

Peak Surge Current (8/20μs): 2kA  

Maximum Energy (2ms): 30J  

Capacitance (1kHz): approx. 6000pF  

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:

20D220K MOV Varistor

20D361K MOV Varistor

20D391K MOV Varistor

20D Series 20mm MOV Varistors

Replacement and Cross Reference

S20K17 (TDK EPCOS)  

B72220S0170K101 (TDK EPCOS)  

20D270K offers comparable electrical characteristics and can be used as an alternative to the above models in low voltage protection applications.

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