Is there a pin-compatible replacement for HEL-10D471K?

Several radial disc varistors like ERZV10D431 share the same 2-pin through-hole package, but electrical differences require careful review. No drop-in replacement is confirmed without circuit analysis.

What risks should I check before replacing HEL-10D471K?

Verify the substitute's varistor voltage, maximum AC voltage, and clamping voltage are suitable for your circuit's operating and transient conditions. Also, check the disc diameter and lead spacing for physical compatibility.

HEL-10D471K Alternatives, Datasheet & Cross Reference | Guangdong Hongzhi Electronics Technology Co., Ltd.

Find and compare replacements for the HEL-10D471K, a 10mm 470V metal oxide varistor. Key parameters for substitutes include varistor voltage, surge current, and physical disc size.

AI replacement insight

Electrical riskmedium

Substitutes have slightly lower voltage ratings, requiring circuit validation.

Package risklow

Some candidates have larger diameters, but pin-compatible packages are available.

Can it be replaced directly?

No confirmed direct drop-in replacement exists. The closest options, like Panasonic's ERZV10D431, have minor parametric differences and require engineering validation.

Best replacement path

Panasonic's ERZV10D431 offers the closest form and fit, but requires review of its slightly lower voltage ratings.

Main risk

Using a substitute with a lower varistor voltage may lead to premature wear or failure if the circuit's normal operating voltage is too close to the new, lower threshold.

Recommended alternatives

A functional alternative with the same 10mm disc diameter and surge rating, but slightly lower voltage ratings.

View details

Alternative comparison matrix

Feature / factor	HEL-10D471K	ERZV10D431	B72214S0271K551V87	Compatibility / risk
Package	Radial Disc	Radial Disc	Radial, Disc	Radial Disc / Radial, Disc — Package style matches.; B72214S0271K551V87: Package style matches.
Disc Diameter	10 mm	10 mm	14 mm	10 mm / 14 mm — Physical diameter matches.; B72214S0271K551V87: Larger diameter may not fit.
Varistor Voltage	470 V	430 V	430 V	430 V — Slightly lower, requires review.; B72214S0271K551V87: Slightly lower, requires review.
Max Ac Voltage	300 V	275 V	275 V	275 V — Slightly lower, requires review.; B72214S0271K551V87: Slightly lower, requires review.
Clamping Voltage	775 V	710 V	-	710 V — Lower clamping voltage provides better protection.
Surge Current	2500 A	2500 A	4500 A	2500 A / 4500 A — Surge current capability matches.; B72214S0271K551V87: Higher surge current capability.
Energy Rating	42.3 J	-	71 J	71 J — Higher energy rating.

Application & sourcing insights

Questions & answers

Panasonic's ERZV10D431 is a strong candidate, matching the 10mm disc size and surge rating, but has a slightly lower varistor voltage (430V vs 470V) that requires review.