Is there a pin-compatible replacement for JK60-040?

Yes, parts like RXEF050-2 and RL60-050 share the same radial leaded package and pinout. However, their electrical characteristics, especially hold and trip currents, differ and require careful engineering review before substitution.

What risks should I check before replacing JK60-040?

The main risk is inadequate overcurrent protection. Candidates have higher hold/trip currents (e.g., 0.5A/1.0A vs 0.4A/0.8A), which may not protect the downstream circuit. Always verify these new current levels are safe for your design.

JK60-040 Alternatives, Datasheet & Cross Reference | Jinrui Electronic Materials Co.

The JK60-040 is a 60V, 400mA PTC resettable fuse in a radial leaded package. When seeking alternatives, it's critical to match the hold and trip currents to ensure proper circuit protection.

AI replacement insight

Electrical riskhigh

Higher current ratings pose a significant risk to downstream components.

Package risklow

Radial leaded package is common and alternatives match the form factor.

Sourcing riskmedium

Alternatives from major brands may improve availability over the original part.

Can it be replaced directly?

No, a direct drop-in replacement with identical key parameters was not found. All potential substitutes require engineering validation due to different current ratings.

Best replacement path

Review functional alternatives like the Littelfuse RXEF050-2, but only after confirming the higher 0.5A hold current is acceptable for the application.

Main risk

Inadequate overcurrent protection due to higher hold and trip current ratings in available alternatives.

Recommended alternatives

A functional alternative with a higher voltage rating but increased current thresholds that require careful review.

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Alternative comparison matrix

Feature / factor	JK60-040	RXEF050-2	RL60-050	Compatibility / risk
Package	Radial Leaded	Radial Leaded	Radial Leaded	Radial Leaded — Package form factor matches.; RL60-050: Package form factor matches.
Voltage	60V	72V	60V	72V / 60V — Higher voltage rating provides more safety margin.; RL60-050: Voltage rating matches.
Current	0.8A	1.0A	1.0A	1.0A — Trip current is higher, delaying circuit protection.; RL60-050: Trip current is higher, delaying circuit protection.
Resistance	0.45Ω - 0.88Ω	0.50Ω - 0.77Ω	-	0.50Ω - 0.77Ω — Initial resistance range is comparable.

Application & sourcing insights

Questions & answers

There are no direct drop-in replacements found. Alternatives like Littelfuse RXEF050-2 have higher current ratings (0.5A hold) which reduce protection and must be validated by an engineer for your specific application.