Is there a pin-compatible replacement for JK-SMD0603-050-6?

Yes, parts like SMD0603P050TF and SMD0603-050C-12V use the same 0603 package and 2-pin layout, making them form-fit compatible. Electrical parameters should be verified for your application.

What risks should I check before replacing JK-SMD0603-050-6?

Verify the hold current (Ih), trip current (It), and max voltage (Vmax). Also, check dynamic characteristics like time-to-trip and resistance-temperature curves from the datasheets to ensure proper circuit protection.

JK-SMD0603-050-6 Alternatives, Datasheet & Cross Reference | Jinrui Electronic Materials Co.

The JK-SMD0603-050-6 is a 6V, 500mA hold current PTC resettable fuse in a 0603 package. Several functional alternatives and potential upgrades are available, offering similar overcurrent protection characteristics.

AI replacement insight

Electrical risklow

Key static parameters match well across top candidates.

Package risklow

All top candidates use the same 0603 package.

Can it be replaced directly?

SMD0603P050TF is a strong candidate for direct replacement, matching key electrical parameters and package.

Best replacement path

SMD0603-050C-12V offers an upgrade path with a higher voltage rating.

Main risk

The primary risk is a mismatch in dynamic response (time-to-trip), which requires datasheet review.

Recommended alternatives

An upgrade path with a higher 12V rating and matching hold/trip current in the same 0603 package.

View details

Alternative comparison matrix

Feature / factor	JK-SMD0603-050-6	SMD0603-050C-12V	SMD0603P050TF	Compatibility / risk
Package	0603	0603	0603	0603 — Same package and pin count.; SMD0603P050TF: Same package and pin count.
Voltage	6V	12V	6V	12V / 6V — Higher voltage rating provides more design margin.; SMD0603P050TF: Maximum operating voltage matches.
Current	40A	40A	35A	40A / 35A — Max fault current (Imax) matches.; SMD0603P050TF: Max fault current may be slightly lower, requires datasheet check.

Application & sourcing insights

Questions & answers

SMD0603-050C-12V by BNstar is an excellent alternative, offering the same hold/trip currents and a higher 12V voltage rating for increased design margin.