Is there a pin-compatible replacement for BSMD1812-200-12V?

Yes, parts like mSMD200-16V and SMD1812-200C-16V use the same 1812 package and are electrically very similar, making them strong candidates for pin-compatible replacement after design review.

What risks should I check before replacing BSMD1812-200-12V?

Before replacing, verify the candidate's time-to-trip curve, resistance profile (both initial and post-trip), and temperature derating to ensure it provides the expected protection in your specific circuit.

BSMD1812-200-12V Alternatives, Datasheet & Cross Reference | BHFUSE

BSMD1812-200-12V is a 2A, 12V PTC resettable fuse in a standard 1812 package. Several alternatives with matching form and key electrical ratings are available, often with higher voltage margins for improved reliability.

AI replacement insight

Electrical risklow

Key parameters match well; voltage is improved.

Package risklow

Standard 1812 package is a direct fit.

Can it be replaced directly?

Yes, several direct replacements exist in the same 1812 package with a 2A hold current and 12V or higher voltage rating.

Best replacement path

Use a cross-vendor part like TECHFUSE mSMD200-16V, which matches key ratings and offers a higher voltage margin.

Main risk

Minor differences in trip time and resistance characteristics may require validation in the end application.

Recommended alternatives

An excellent alternative in the same 1812 package, matching all key electrical ratings with a higher voltage margin.

View details

Alternative comparison matrix

Feature / factor	BSMD1812-200-12V	mSMD200-16V	SMD1812-200C-16V	Compatibility / risk
Package	1812	1812	1812	1812 — Same package and pin count.; SMD1812-200C-16V: Same package and pin count.
Voltage	12.0V	16V	16.0V	16V / 16.0V — Higher voltage rating provides more margin.; SMD1812-200C-16V: Higher voltage rating provides more margin.
Current	2.0A	2A	2.0A	2A / 2.0A — Hold current matches.; SMD1812-200C-16V: Hold current matches.
Trip Current	4A	4A	4.0A	4A / 4.0A — Trip current matches.; SMD1812-200C-16V: Trip current matches.
Max Fault Current	100A	100A	100A	100A — Max fault current matches.; SMD1812-200C-16V: Max fault current matches.
Resistance	0.100Ω	0.100Ω	0.120Ω	0.100Ω / 0.120Ω — Initial and post-trip resistance match.; SMD1812-200C-16V: Post-trip resistance is slightly higher.

Application & sourcing insights

Questions & answers

The strongest alternative is mSMD200-16V from TECHFUSE. It matches the 2A hold current, 4A trip current, and 1812 package, while offering a higher 16V rating.