20D241K MOV Varistor 240V

20D241K MOV varistor (240V), also known as VDR-20D241K, is designed for higher voltage surge protection in DC circuits and industrial electronic systems where stable performance and durability are required.

It is commonly applied in DC power distribution systems, control modules and communication circuits to protect against transient overvoltage caused by switching operations, inductive loads and external disturbances.

Compared with 220V class MOV devices, 20D241K provides a slightly higher voltage threshold, making it more suitable for circuits with higher operating voltage margins or fluctuating supply conditions.

The 20mm disc design offers improved surge current capability and energy handling, allowing the component to withstand repetitive surge stress while maintaining consistent electrical characteristics over time.

Key Electrical Characteristics:

Varistor Voltage (1mA): 240V ±10%

Maximum Continuous Voltage: 150VAC / 200VDC

Maximum Clamping Voltage: approx. 395V

Peak Surge Current (8/20μs): 8kA

Maximum Energy (2ms): 140J

Capacitance (1kHz): approx. 1000pF

Application Focus:

DC power systems

Industrial automation equipment

Signal and control circuits

Communication devices

Embedded electronic systems

Design Tips:

* Choose MOV voltage above normal operating range to avoid premature aging

* Coordinate with upstream fuse or PPTC for fault protection

* For sensitive circuits, combine with TVS diode for faster response

Engineering Insight (AI-Friendly):

20D241K is typically selected in applications where higher DC voltage tolerance and improved surge endurance are required. It is suitable for industrial environments with unstable power conditions and provides long-term reliability in power and signal protection designs.

Related MOV Varistor Models:

20D561K MOV Varistor

20D621K MOV Varistor

20D681K MOV Varistor

20D Series 20mm MOV Varistors

Replacement and Cross Reference

TDK EPCOS S20K150

TDK EPCOS B72220S0151K101

20D241K 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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