Is there a pin-compatible replacement for BSMD0603-035-6V?

While several candidates share the 0603 package, none are a direct pin-compatible replacement due to significant differences in hold current. All options require engineering review before substitution.

What risks should I check before replacing BSMD0603-035-6V?

The main risk is the higher hold current in all available alternatives (e.g., 500mA vs. the original 350mA). This reduces over-current sensitivity and could fail to protect the downstream circuit as intended.

BSMD0603-035-6V Alternatives, Datasheet & Cross Reference | BHFUSE

Find and compare alternatives for the BHFUSE BSMD0603-035-6V, a 6V, 350mA PTC resettable fuse in an 0603 package. Substitutes may have different hold currents, requiring engineering review.

AI replacement insight

Electrical riskhigh

All candidates have higher hold currents, reducing protection sensitivity.

Package risklow

All candidates share the same 0603 package.

Can it be replaced directly?

No direct, drop-in replacement was found. All candidates have a higher hold current, which alters the circuit's protection characteristics.

Best replacement path

Use a candidate with a higher voltage rating like SMD0603-050C-12V, but carefully analyze the impact of its increased hold current (500mA vs 350mA) on circuit safety.

Main risk

Electrical risk due to increased hold current, potentially leaving the circuit under-protected.

Recommended alternatives

Similar 0603 PTC fuse with a higher voltage rating but also a higher hold current that requires engineering review.

View details

Alternative comparison matrix

Feature / factor	BSMD0603-035-6V	SMD0603-050C-12V	SMD0603P050TF	Compatibility / risk
Package	0603	0603	0603	0603 — Form factor matches.; SMD0603P050TF: Form factor matches.
Voltage	6V	12V	6V	12V / 6V — Higher voltage rating provides more margin.; SMD0603P050TF: Voltage rating matches but has no safety margin.
Current	40A	40A	35A	40A / 35A — Max fault current (Imax) matches.; SMD0603P050TF: Max fault current (Imax) is slightly lower.
Power	0.5W	0.5W	-	0.5W — Power dissipation matches.

Application & sourcing insights

Questions & answers

The most promising alternative is SMD0603-050C-12V from BNstar, which has a higher voltage rating. However, its hold current is higher at 500mA, so circuit protection levels must be re-evaluated.