Is there a pin-compatible replacement for 10D431K?

Currently, no pin-compatible, drop-in replacement with the same 10mm disc size has been identified. Alternatives like the 14D431K are electrically similar but physically larger.

What risks should I check before replacing 10D431K?

The main risks are physical fit and electrical protection levels. Ensure the replacement's package size (e.g., disc diameter) fits your PCB layout. Also, verify the varistor voltage is not too high, as this could reduce protection for your circuit.

10D431K Alternatives, Datasheet & Cross Reference | COV

The COV 10D431K is a 10mm radial disc varistor rated for 430V, designed for overvoltage protection. When seeking alternatives, key considerations are matching the varistor voltage and ensuring physical compatibility.

AI replacement insight

Package riskhigh

Most alternatives are 14mm, requiring a board spin.

Electrical riskmedium

Some candidates have higher varistor voltage, which may compromise protection.

Sourcing risklow

Varistors with similar ratings are widely available from multiple vendors.

Can it be replaced directly?

No direct, drop-in replacement for the 10D431K has been confirmed. All viable candidates require reviewing physical dimensions or electrical parameters.

Best replacement path

Use a functional alternative like RUILON's 14D431K, which matches electrical ratings but requires a PCB layout update for its larger 14mm package.

Main risk

The primary risk is physical incompatibility, as most electrically similar parts have a larger 14mm disc diameter instead of the target's 10mm.

Recommended alternatives

A functional alternative with matching voltage ratings and higher surge current, but a larger 14mm package.

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Alternative comparison matrix

Feature / factor	10D431K	14D431K	STE14D471K1EN0FSB0R0	Compatibility / risk
Package	10mm	14mm	14mm	14mm — Candidate has a larger disc diameter, requires layout change.; STE14D471K1EN0FSB0R0: Candidate has a larger disc diameter.
Voltage	275V AC / 350V DC	275V AC / 350V DC	300V AC / 385V DC	275V AC / 350V DC / 300V AC / 385V DC — Max continuous voltage matches target.; STE14D471K1EN0FSB0R0: Higher max continuous voltage.
Current	2.5kA	4.5kA	4.5kA	4.5kA — Higher peak surge current provides more robust protection.; STE14D471K1EN0FSB0R0: Higher peak surge current is an upgrade.

Application & sourcing insights

Questions & answers

The RUILON 14D431K is a strong functional alternative with identical voltage ratings and higher surge current capacity. However, it has a larger 14mm diameter and requires board layout changes.