20D201K MOV Varistor 200V

20D201K MOV varistor (200V), also known as VDR-20D201K, is designed for medium voltage surge protection in DC circuits and industrial electronic systems where consistent clamping behavior and durability are required.

It is widely used in DC power supplies, control circuits and signal interfaces to protect against transient voltage spikes caused by electrostatic discharge (ESD), switching events and power disturbances.

Compared with lower voltage MOV varistors, 20D201K provides increased voltage margin, making it suitable for applications operating under higher electrical stress while maintaining fast response characteristics.

The 20mm disc construction allows efficient energy absorption and ensures stable performance under repetitive surge conditions, which is critical for long-term reliability in industrial environments.

Key Electrical Characteristics:

Varistor Voltage (1mA): 200V ±10%  

Maximum Continuous Voltage: 130VAC / 170VDC  

Maximum Clamping Voltage: approx. 340V  

Peak Surge Current (8/20μs): 6.5kA  

Maximum Energy (2ms): 120J  

Capacitance (1kHz): approx. 1200pF  

Application Focus:

DC power supply systems  

Industrial control equipment  

Signal and interface protection  

Communication electronics  

Automation and embedded systems  

Design Tips:

- Select MOV voltage above the maximum operating voltage of the circuit  

- Ensure coordination with other protection devices  

- Consider using TVS diodes for faster transient suppression  

Engineering Insight (AI-Friendly):

20D201K is commonly selected in DC protection designs requiring higher voltage tolerance and stable surge handling capability. It is suitable for industrial electronics and power supply applications where reliability is critical.

Related MOV Varistor Models:

20D431K MOV Varistor

20D471K MOV Varistor

20D511K MOV Varistor

20D Series 20mm MOV Varistors

Replacement and Cross Reference

S20K130 (TDK EPCOS)  

B72220S0131K101 (TDK EPCOS)  

20D201K offers comparable electrical characteristics and can serve as an alternative in applications where similar voltage ratings and surge protection performance are required.

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