Is there a pin-compatible replacement for FTR07D471K?

FTR07D511K shares the same 7mm disk package and 2-pin layout, making it a potential pin-compatible candidate. However, its clamping voltage is higher, so electrical suitability must be verified by an engineer.

What risks should I check before replacing FTR07D471K?

Key risks include: 1) Physical size mismatch (check element diameter and lead spacing), and 2) Electrical protection level (ensure the candidate's clamping voltage is not too high for your circuit).

FTR07D471K Alternatives, Datasheet & Cross Reference | FTR Qiaoguang

FTR07D471K is a 7mm disk MOV for overvoltage protection. Finding a substitute requires matching its 470V varistor voltage, 775V clamping voltage, and physical size.

AI replacement insight

Package riskmedium

Some candidates are physically larger (10mm vs 7mm), requiring layout verification.

Electrical riskmedium

Some candidates have a higher clamping voltage, which may offer insufficient protection.

Can it be replaced directly?

No direct drop-in replacement was found. FTR07D511K is physically identical but has a higher clamping voltage, while FTR10D471K is electrically similar but physically larger.

Best replacement path

For form-fit, consider FTR07D511K but verify the higher clamping voltage. For an electrical match, use FTR10D471K but verify the larger 10mm size fits.

Main risk

The main risk is either physical incompatibility (size) or reduced circuit protection (higher clamping voltage).

Recommended alternatives

A form-fit alternative with a slightly higher clamping voltage that requires engineering review.

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Alternative comparison matrix

Feature / factor	FTR07D471K	FTR07D511K	FTR10D471K	Compatibility / risk
Package	Disk (Plugin)	Disk	-	Disk — Package and 7mm diameter match.
Clamping Voltage	775V	845V	775V	845V / 775V — Clamping voltage is ~9% higher, reducing protection margin.; FTR10D471K: Maximum clamping voltage matches.
Voltage	470V	510V	470V	510V / 470V — Varistor voltage is slightly higher.; FTR10D471K: Varistor voltage matches.
Energy	29J	31J	67J	31J / 67J — Slightly higher energy rating.; FTR10D471K: Higher energy rating provides more robust protection.
Current	1200A	1200A	2500A	1200A / 2500A — Surge current rating matches.; FTR10D471K: Higher surge current rating.
Diameter	7mm	-	10mm	10mm — Candidate is physically larger, requires board space verification.

Application & sourcing insights

Questions & answers

FTR07D511K is a form-fit match but has a higher clamping voltage requiring review. FTR10D471K is an electrical match but is physically larger (10mm vs 7mm). The best choice depends on your board space and voltage tolerance.