Is there a pin-compatible replacement for 05D471K?

No pin-compatible replacement has been verified. Candidates like FTR07D471K are electrically superior but have a larger physical size (7mm vs 5mm) that must be checked before use.

What risks should I check before replacing 05D471K?

The main risk is physical incompatibility. Alternatives may be larger (e.g., 7mm or 10mm disk diameter vs the original 5mm). Always verify the substitute will fit on your PCB.

05D471K Alternatives, Datasheet & Cross Reference | RUILON

Finding a substitute for the RUILON 05D471K varistor involves matching its 470V varistor voltage and 5mm disk package. While several electrical upgrades exist, they often come in larger packages requiring board layout verification.

AI replacement insight

Package riskhigh

Candidates are 7mm or 10mm, larger than the 5mm original.

Electrical risklow

Recommended alternatives are electrical upgrades if they fit.

Can it be replaced directly?

No direct drop-in replacement has been confirmed. The best candidates are electrical upgrades in larger packages that require physical fit verification.

Best replacement path

FTR07D471K offers superior electrical protection but requires checking for physical clearance due to its larger 7mm package.

Main risk

Physical package mismatch is the primary risk; substitutes are larger than the original 5mm part, which may not fit on the PCB.

Recommended alternatives

A strong electrical upgrade with higher surge capability, but in a slightly larger 7mm package that needs fit verification.

View details

Alternative comparison matrix

Feature / factor	05D471K	FTR07D471K	FTR10D471K	Compatibility / risk
Package	Disk (5mm)	Disk (7mm)	Disk (10mm)	Disk (7mm) / Disk (10mm) — Candidate is larger and requires layout verification.; FTR10D471K: Candidate is significantly larger and requires layout verification.
Voltage	810V	775V	775V	775V — Lower clamping voltage offers better protection.; FTR10D471K: Lower clamping voltage offers better protection.
Current	400A	1200A	2500A	1200A / 2500A — Higher surge current rating provides more robust protection.; FTR10D471K: Higher surge current rating provides more robust protection.
Power	15J	29J	67J	29J / 67J — Higher energy rating provides more robust protection.; FTR10D471K: Higher energy rating provides more robust protection.

Application & sourcing insights

Questions & answers

FTR07D471K is a strong electrical upgrade with better protection ratings, but its 7mm package is larger than the original 5mm and requires physical fit verification on your board.