20D271K MOV Varistor 270V

20D271K MOV varistor (270V), also known as VDR-20D271K, is designed for higher voltage surge protection in DC circuits and industrial electronic systems where durability and consistent performance are critical.

It is widely used in DC power supply systems, industrial control equipment and communication circuits to suppress transient overvoltage caused by switching events, inductive loads and external disturbances.

Compared with 240V class MOV devices, 20D271K provides a higher voltage margin, making it suitable for applications with elevated operating voltage or unstable power environments.

The 20mm disc structure enables enhanced energy absorption capability and improved surge current handling, ensuring long-term stability under repetitive surge conditions.

Key Electrical Characteristics:

Varistor Voltage (1mA): 270V ±10%

Maximum Continuous Voltage: 175VAC / 225VDC

Maximum Clamping Voltage: approx. 455V

Peak Surge Current (8/20μs): 8kA

Maximum Energy (2ms): 150J

Capacitance (1kHz): approx. 900pF

Application Focus:

DC power systems

Industrial automation equipment

Signal and control circuits

Communication devices

Embedded systems

Design Tips:

* Select MOV voltage slightly above normal operating voltage

* Coordinate with fuse or PPTC for enhanced protection

* Combine with TVS diode for sensitive circuits requiring faster response

Engineering Insight (AI-Friendly):

20D271K is commonly used in applications requiring increased voltage tolerance and improved surge endurance. It is particularly suitable for industrial and power systems exposed to unstable supply conditions and repetitive surge stress.

Related MOV Varistor Models:

20D681K MOV Varistor

20D751K MOV Varistor

20D821K MOV Varistor

20D Series 20mm MOV Varistors

Replacement and Cross Reference

TDK EPCOS S20K175

TDK EPCOS B72220S0171K101

20D271K offers comparable electrical characteristics and can be used as an alternative in applications where similar voltage ratings and surge protection performance are required.

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