Is there a pin-compatible replacement for FSMD075-33R?

Parts like BSMD1812-075-33V share the same 1812 package and 2-pin layout, making them form-fit compatible. True pin-to-pin electrical compatibility should be confirmed by an engineer by reviewing the full datasheets.

What risks should I check before replacing FSMD075-33R?

Key risks include mismatched hold/trip currents affecting protection levels, different resistance values changing circuit behavior, and lower power ratings causing premature failure. Always review the candidate's datasheet.

FSMD075-33R Alternatives, Datasheet & Cross Reference | FUZETEC

Finding a replacement for the FSMD075-33R PTC fuse involves matching its 1812 package, 33V rating, and 0.75A hold current. Several cross-vendor options exist with similar electrical characteristics.

AI replacement insight

Electrical riskhigh

Using a part with incorrect hold/trip current compromises circuit protection.

Package risklow

The 1812 package is standardized, making physical replacement straightforward.

Can it be replaced directly?

Yes, parts like BHFUSE BSMD1812-075-33V are strong candidates for direct replacement after an engineering review of the full datasheet.

Best replacement path

Cross to another manufacturer offering a PTC fuse with identical hold current (0.75A), voltage (33V), and 1812 package.

Main risk

The main risk is selecting a part with a higher hold current, which would fail to protect the circuit under the intended fault conditions.

Recommended alternatives

Strong alternative with matching hold current, voltage, power, and 1812 package.

View details

Alternative comparison matrix

Feature / factor	FSMD075-33R	BSMD1812-075-33V	SMD1812-075C-33V	Compatibility / risk
Package	1812	1812	1812	1812 — Same package ensures layout compatibility.; SMD1812-075C-33V: Same package ensures layout compatibility.
Current	0.75A	0.75A	0.75A	0.75A — Hold current (Ih) matches, ensuring same protection level.; SMD1812-075C-33V: Hold current (Ih) matches.
Voltage	33.0V	33.0V	33.0V	33.0V — Maximum voltage rating matches.; SMD1812-075C-33V: Maximum voltage rating matches.
Power	1.0W	1.0W	0.8W	1.0W / 0.8W — Typical power dissipation matches.; SMD1812-075C-33V: Lower power dissipation may affect performance in some circuits.
Resistance	Rmin:0.11, R1max:0.40	Rmin:0.09, R1max:0.45	Rmin:0.09, R1max:0.45	Rmin:0.09, R1max:0.45 — Resistance values are very similar.; SMD1812-075C-33V: Resistance values are very similar.

Application & sourcing insights

Questions & answers

BSMD1812-075-33V by BHFUSE is a strong candidate, matching key specs like hold current (0.75A), voltage (33V), and 1812 package. Always verify the full datasheet for your specific application.