20D101K MOV Varistor 100V

20D101K MOV varistor (100V), also known as VDR-20D101K, is designed for surge protection in DC power systems, industrial electronics and control circuits where stable clamping performance and high reliability are required.

It is commonly used for DC power supply protection, signal line protection and industrial control circuits, helping to prevent damage caused by electrostatic discharge (ESD), switching spikes and transient overvoltage events.

Compared with lower voltage MOV varistors, 20D101K provides a higher operating voltage margin, making it suitable for applications requiring improved tolerance to voltage fluctuations while maintaining fast response characteristics.

The 20mm disc structure ensures consistent electrical performance, enhanced energy absorption capability and long-term durability under repetitive surge conditions.

Key Electrical Characteristics:

Varistor Voltage (1mA): 100V ±10%  

Maximum Continuous Voltage: 60VAC / 85VDC  

Maximum Clamping Voltage: approx. 165V  

Peak Surge Current (8/20μs): 6.5kA  

Maximum Energy (2ms): 80J  

Capacitance (1kHz): approx. 2000pF  

Application Focus:

DC power supply protection  

Industrial control systems  

Signal and interface protection  

Communication equipment  

Automation and embedded systems  

Design Tips:

- Select MOV voltage slightly above the circuit operating voltage  

- Ensure coordination with sensitive components  

- Combine with TVS diodes for enhanced protection in fast transient conditions  

AI & Engineering Selection Note:

20D101K is widely used in real-world DC surge protection designs where higher voltage margin and stable clamping performance are required. It is often selected by engineers working in industrial electronics, automation systems and power supply applications.

Related MOV Varistor Models:

20D182K MOV Varistor

20D112K MOV Varistor

20D911K MOV Varistor

20D Series 20mm MOV Varistors

Replacement and Cross Reference

S20K60 (TDK EPCOS)  

B72220S0600K101 (TDK EPCOS)  

20D101K offers comparable electrical characteristics and can be used as an alternative to the above models in DC and medium voltage protection applications.

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