Is there a pin-compatible replacement for 431KD14?

Yes, parts like 561KD14 and 681KD14 are pin-compatible (2-pin, Disc 14mm package). However, they are not electrically identical, as their varistor voltages are higher, which affects their protection level.

What risks should I check before replacing 431KD14?

The main risk is electrical. A replacement with a higher varistor voltage will clamp transients at a higher level, potentially exposing your circuit to damaging voltages the original part would have suppressed. Always verify the maximum voltage tolerance of your protected circuit.

431KD14 Alternatives, Datasheet & Cross Reference | Yageo

Finding a substitute for the Yageo 431KD14 MOV involves balancing physical fit with electrical protection. While several parts share its 14mm disc package, matching the 430V varistor voltage is the primary challenge for ensuring equivalent protection.

AI replacement insight

Electrical riskmedium

Higher clamping voltage may not adequately protect downstream components from transients.

Package risklow

Candidates share the same 'Disc 14mm' package, ensuring physical compatibility.

Can it be replaced directly?

No direct, drop-in replacement for the 431KD14 was found. All alternatives require engineering review due to different varistor voltages.

Best replacement path

The closest alternative is Yageo's 561KD14. It shares the same package and surge rating but has a higher varistor voltage (560V vs 430V).

Main risk

The primary risk is insufficient overvoltage protection, as all viable alternatives have a higher clamping voltage than the original part.

Recommended alternatives

A parametric alternative with the same package and surge rating, but a higher varistor voltage requires review.

View details

Alternative comparison matrix

Feature / factor	431KD14	561KD14	681KD14	Compatibility / risk
Package	Disc 14mm	Disc 14mm	14mm Disc	Disc 14mm / 14mm Disc — Package matches, ensuring form-fit compatibility.; 681KD14: Package name differs slightly but likely identical. Verify dimensions.
Voltage	430V	560V	680V	560V / 680V — Higher varistor voltage provides less protection.; 681KD14: Significantly higher varistor voltage provides less protection.
Current	4500A	4500A	4500A	4500A — Surge current capability is identical.; 681KD14: Surge current capability is identical.
Pinout	Through Hole	Through Hole	-	Through Hole — Both are 2-pin through-hole devices.

Application & sourcing insights

Questions & answers

The best available alternative is Yageo's 561KD14. While it matches the package and surge current, its varistor voltage is higher (560V vs 430V), which requires careful engineering evaluation for your application.