Is there a pin-compatible replacement for BSMD0805L-300?

Several parts like TECHFUSE SL0805300 share the same 0805 package and 2-pin layout. However, parametric differences in power rating and resistance require careful review before considering them drop-in replacements.

What risks should I check before replacing BSMD0805L-300?

Key risks include differences in power dissipation, which affects thermal performance, and variations in initial and post-trip resistance, which can impact circuit behavior during normal operation and after a fault event.

BSMD0805L-300 Alternatives, Datasheet & Cross Reference | BHFUSE

BSMD0805L-300 is a 6V, 3A hold current PTC resettable fuse in an 0805 package. This page provides analysis of potential alternatives, focusing on key electrical parameters and package compatibility.

AI replacement insight

Electrical riskmedium

Lower power ratings and different resistance values require validation.

Package risklow

All viable candidates share the same 0805 package.

Sourcing risklow

Multiple vendors produce similar parts.

Can it be replaced directly?

No direct drop-in replacement has been verified. All candidates require engineering review due to parametric differences, primarily in power dissipation and resistance.

Best replacement path

TECHFUSE SL0805300 is the closest match but requires review of its lower power rating.

Main risk

Thermal performance due to lower power dissipation in candidates.

Recommended alternatives

Functionally similar PTC fuse in the same package, but with lower power dissipation requiring engineering review.

View details

Alternative comparison matrix

Feature / factor	BSMD0805L-300	SL0805300	JK-SMD0805-300L	Compatibility / risk
Package	0805	0805	0805	0805 — Form factor matches.; JK-SMD0805-300L: Form factor matches.
Voltage	6.0V	6.0V	6.0V	6.0V — Max voltage matches, no safety margin.; JK-SMD0805-300L: Max voltage matches.
Current	3.0A	3.0A	3.0A	3.0A — Hold current matches.; JK-SMD0805-300L: Hold current matches.
Power	1.2W	1.0W	0.8W	1.0W / 0.8W — Candidate has lower power dissipation.; JK-SMD0805-300L: Significantly lower power dissipation.
Resistance	0.020Ω	0.045Ω	-	0.045Ω — Higher post-trip resistance may affect reset behavior.
Tcr	5s	-	2s	2s — Faster time-to-trip may be acceptable or desired.

Application & sourcing insights

Questions & answers

TECHFUSE SL0805300 is a strong functional alternative, but has lower power dissipation (1.0W vs 1.2W). Engineering review is required to ensure thermal compatibility.