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Best Alternatives to BSMD1812-200-8V

Package: 1812BHFUSECircuit ProtectionHold Current: 2ATrip Current: 4AMax Voltage (Vmax): 8VMax Fault Current (Imax): 100APower Dissipation (Pd typ): 1W

BSMD1812-200-8V is a popular 1812-size PTC resettable fuse with a 2A hold current and 8V rating. Several pin-compatible alternatives with higher voltage ratings are available, offering increased design margin.

AI replacement insight

Electrical riskmedium

Hold current must be matched to maintain protection level. Voltage must be >= 8V.

Package risklow

1812 is a standard SMD package with consistent dimensions.

Sourcing risklow

Multiple manufacturers produce compatible PTC fuses.

Can it be replaced directly?

Direct replacement for BSMD1812-200-8V should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Prioritize candidates with an identical 2A hold current and an equal or higher voltage rating, such as mSMD200-16V.

Main risk

The main risk is selecting a part with a higher hold current, which would not protect the circuit at the intended 2A level.

Recommended alternatives

4
mSMD200-16V package
mSMD200-16V

TECHFUSE

Needs validationlow risk

A strong alternative with identical hold/trip currents, lower initial resistance, and a higher voltage rating (16V).

View details

Alternative comparison matrix

Feature / factorBSMD1812-200-8VmSMD200-16VSMD1812-200C-16VSMD1812-260C-24VCompatibility / risk
Package18121812181218121812 — Form factor matches.; SMD1812-200C-16V: Form factor matches.; SMD1812-260C-24V: Form factor matches.; SMD1812P300TF: Form factor matches.
Current2.0A2.0A2.0A2.6A2.0A / 2.6A / 3.0A — Hold current matches target.; SMD1812-200C-16V: Hold current matches target.; SMD1812-260C-24V: Higher hold current reduces protection sensitivity.; SMD1812P300TF: Higher hold current reduces protection sensitivity.
Voltage8.0V16.0V16.0V24.0V16.0V / 24.0V / 8.0V — Higher voltage rating provides more safety margin.; SMD1812-200C-16V: Higher voltage rating provides more safety margin.; SMD1812-260C-24V: Higher voltage rating provides significant safety margin.; SMD1812P300TF: Voltage rating matches, no extra margin.
Trip Current4.0A4.0A4.0A5.2A4.0A / 5.2A / 5.0A — Trip current matches target.; SMD1812-200C-16V: Trip current matches target.; SMD1812-260C-24V: Higher trip current, consistent with higher hold current.; SMD1812P300TF: Higher trip current, consistent with higher hold current.
Resistance0.020Ω0.015Ω0.120Ω-0.015Ω / 0.120Ω — Initial resistance is slightly lower (better).; SMD1812-200C-16V: Post-trip resistance is slightly higher.

Application & sourcing insights

Questions & answers

Verified drop-in options for BSMD1812-200-8V are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.