Is there a pin-compatible replacement for JK-SMD0603-001?

Yes, BSMD0603-001-60V is a pin-compatible replacement in the same 0603 package. While it fits the board, its electrical characteristics, specifically the max fault current (20A vs 40A) and trip current (50mA vs 30mA), differ and require engineering review.

What risks should I check before replacing JK-SMD0603-001?

Before replacing, check three key parameters: 1) Hold Current (Ihold) must match to ensure correct protection level. 2) Max Voltage (Vmax) must be equal or greater. 3) Max Fault Current (Imax) must be high enough to handle the worst-case short circuit in your system.

JK-SMD0603-001 Alternatives, Datasheet & Cross Reference | Jinrui Electronic Materials Co.

Finding a substitute for the JK-SMD0603-001 PTC fuse involves matching the 0603 package, 30V voltage, and 10mA hold current. While several options exist, careful attention must be paid to secondary parameters like trip and max fault current to ensure system safety and reliabil...

AI replacement insight

Electrical riskmedium

Candidate BSMD0603-001-60V has a lower max fault current (20A vs 40A) that must be verified.

Package risklow

All viable candidates share the same 0603 package, ensuring form and fit compatibility.

Can it be replaced directly?

No, a direct 1-to-1 replacement without any review is not available. The best option, BSMD0603-001-60V, has a different maximum fault current rating that must be checked.

Best replacement path

BSMD0603-001-60V from BHFUSE is the best available alternative. It matches the hold current and package, with an improved voltage rating.

Main risk

The primary risk is the maximum fault current (Imax). The best candidate, BSMD0603-001-60V, has an Imax of 20A, while the original part is rated for 40A. This could lead to fuse failure in high-energy fault events.

Recommended alternatives

Strong alternative with matching package and hold current, plus a higher voltage rating. Review of fault current required.

View details

Alternative comparison matrix

Feature / factor	JK-SMD0603-001	BSMD0603-001-60V	JK-SMD0603-002	Compatibility / risk
Package	0603	0603	-	0603 — Package size matches.
Voltage	30V	60V	-	30V — Maximum voltage rating matches.
Current	10mA	10mA	-	20mA — Hold current is 2x higher, reducing circuit protection.
Max Fault Current	40A	20A	-	20A — Max fault current is lower and must be verified against application requirements.
Trip Current	30mA	50mA	-	60mA — Trip current is 2x higher.

Application & sourcing insights

Questions & answers

The best alternative is BSMD0603-001-60V by BHFUSE. It matches the 10mA hold current and 0603 package, and offers a higher 60V rating. However, you must verify that its lower 20A max fault current is sufficient for your application.