20D112K MOV Varistor 1100V

20D112K MOV varistor (1100V), also known as VDR-20D112K, is designed for high voltage surge protection in demanding AC power systems where maximum voltage tolerance and high energy absorption are required.

This component is widely used in 480V–680VAC systems, providing effective protection against transient overvoltage caused by lightning strikes, switching surges and grid disturbances in industrial and energy applications.

Compared with lower voltage MOVs, 20D112K offers a higher operating voltage range and superior surge endurance, making it ideal for harsh environments such as power distribution systems, industrial drives, inverters and renewable energy equipment.

Its 20mm disc structure ensures excellent surge current handling capability and long-term stability under repetitive surge exposure.

Key Electrical Characteristics:

Varistor Voltage (1mA): 1100V ±10%  

Maximum Continuous Voltage: 680VAC / 895VDC  

Maximum Clamping Voltage: approx. 1800V  

Peak Surge Current (8/20μs): 8kA  

Maximum Energy (2ms): 300J  

Capacitance (1kHz): approx. 250pF  

Application Focus:

High voltage AC mains protection  

Industrial power systems  

Motor drives and inverters  

Power distribution equipment  

Renewable energy systems  

Design Tips:

- Select MOV voltage according to system voltage (480V–680VAC range)  

- Ensure sufficient surge energy margin in high power applications  

- Use coordinated protection (MOV + fuse or thermal cutoff)  

Related MOV Varistor Models:

20D911K MOV Varistor  

20D102K MOV Varistor  

20D821K MOV Varistor  

20D Series 20mm MOV Varistors

Replacement and Cross Reference

S20K680 (TDK EPCOS)  

B72220S0681K101 (TDK EPCOS)  

All trademarks and part numbers mentioned are for reference only.

For datasheet, quotation or sample request:

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