Is there a pin-compatible replacement for BSMD0402L-035?

Yes, several pin-compatible 0402 PTC fuses exist, such as BSMD0402L-050. However, their electrical parameters like hold current differ, so they are not drop-in replacements without engineering review.

What risks should I check before replacing BSMD0402L-035?

The main risk is mismatched overcurrent protection. A substitute with a higher hold current (e.g., 500mA vs. 350mA) will allow more current before tripping, potentially damaging the circuit it is designed to protect.

BSMD0402L-035 Alternatives, Datasheet & Cross Reference | BHFUSE

BSMD0402L-035 is a 6V, 350mA hold current PTC resettable fuse in a 0402 package. Finding a substitute requires careful matching of hold/trip currents and time-to-trip characteristics to ensure proper circuit protection.

AI replacement insight

Electrical riskmedium

Higher hold current (500mA vs 350mA) changes the protection characteristics.

Package risklow

Candidates share the same 0402 package, ensuring physical compatibility.

Can it be replaced directly?

No direct, drop-in replacement has been verified. Several alternatives exist with higher current ratings that require engineering review to ensure circuit protection.

Best replacement path

Search for 0402 PTC fuses with a 350mA hold current and ≥6V rating. Alternatives with higher current ratings (500mA) are available but require analysis.

Main risk

Using a substitute with a higher hold/trip current may fail to protect the downstream circuit under fault conditions.

Recommended alternatives

A cross-vendor 0402 PTC fuse with a higher 500mA hold current. Requires engineering review before use.

View details

Alternative comparison matrix

Feature / factor	BSMD0402L-035	0402L050SLKR	BSMD0402L-050	0402L050SL6SR	Compatibility / risk
Package	0402	0402	0402	0402	0402 — Form and fit match.; BSMD0402L-050: Form and fit match.; 0402L050SL6SR: Form and fit match.
Current	40A	50A	1.0A	1.0A	50A / 1.0A — Max fault current is higher.; BSMD0402L-050: Higher trip current, consistent with hold current change.; 0402L050SL6SR: Higher trip current, consistent with hold current change.
Voltage	6.0V	6.0V	6.0V	6.0V	6.0V — Voltage rating is identical; no extra margin.; BSMD0402L-050: Voltage rating is identical; no extra margin.; 0402L050SL6SR: Voltage rating is identical; no extra margin.
Power	0.5W	-	0.5W	-	0.5W — Typical power dissipation matches.

Application & sourcing insights

Questions & answers

The best alternatives are other 0402 PTC fuses. While no exact match was found, parts like BSMD0402L-050 or Littelfuse's 0402L050SLKR are options if a higher 500mA hold current is acceptable for your application.