20D511K MOV Varistor

20D511K MOV varistor (510V), also known as VDR-20D511K, is used to protect AC power circuits and industrial electronics against transient overvoltage. It reacts quickly to surge events and helps limit excessive voltage before sensitive components are damaged. Also known as: 20D511

Compared with smaller disc sizes, the 20mm body provides stronger surge current capability and better energy absorption, making this model suitable for circuits facing heavier surge stress.

Key Electrical Characteristics:

Varistor Voltage (1mA): 510V ±10%

Maximum Continuous Voltage: 320VAC / 420VDC

Maximum Clamping Voltage: 840V

Peak Surge Current (8/20μs): 8.0kA

Maximum Energy (2ms): 184J

Typical Use Scenarios:

AC input stage protection

Industrial power supplies

Control panels and automation equipment

Power distribution and motor related circuits

Why Buyers Look for This Type:

- Need a stable second source for repeat orders

- Want lower cost than major international brands

- Need faster delivery for urgent projects

- Need samples for testing before volume approval

What We Can Support:

- Stable quality with consistent batch supply

- Flexible MOQ for sample and trial orders

- Fast response for quotation and delivery

- Technical support for model confirmation

- Sample service for evaluation

Related MOV Varistor Models:

20D151K MOV Varistor

20D361K MOV Varistor

20D391K MOV Varistor

20D Series 20mm MOV Varistors

Replacement and Cross Reference

S20K320 (TDK EPCOS)

B72220S0321K101 (TDK EPCOS)

All trademarks and part numbers mentioned are the property of their respective owners and are used only for cross reference and comparison purposes.

For datasheet, quotation or sample request:

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