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Best Alternatives to SMD1812P350TF

Package: 1812RUILONCircuit ProtectionHold Current: 3.5ATrip Current: 6AOperating Voltage (Max): 6VCurrent Rating (Max): 35AProduct Type: Overvoltage and Overcurrent Protection Devices PTC Resettable Fuses

SMD1812P350TF is a 3.5A, 6V PTC resettable fuse in an 1812 package. Alternatives should match these key parameters, especially the hold current, to ensure proper circuit protection.

AI replacement insight

Electrical riskhigh

Mismatch in hold/trip current can lead to circuit damage or nuisance tripping.

Package risklow

All candidates share the same 1812 package, ensuring physical compatibility.

Can it be replaced directly?

BSMD1812-400-6V is a close parametric match, while BSMD1812-400-12V offers an upgrade in voltage rating. Both are strong candidates.

Best replacement path

Upgrade to BSMD1812-400-12V for a higher voltage margin with a minimal change in hold current.

Main risk

Using a part with a significantly higher hold current (e.g., 5.0A or more) will compromise overcurrent protection.

Recommended alternatives

2
BSMD1812-400-12V package
BSMD1812-400-12V

BHFUSE

Needs validationlow risk

A form-fit compatible PTC fuse with a higher voltage rating (12V) and slightly increased hold current (4.0A).

View details

Alternative comparison matrix

Feature / factorSMD1812P350TFBSMD1812-400-12VBSMD1812-400-6VAlt 3Compatibility / risk
Package1812181218121812 — Form factor matches.; BSMD1812-400-6V: Form factor matches.
Voltage6V12V6V12V / 6V — Higher voltage rating provides more margin.; BSMD1812-400-6V: Voltage rating is identical.
Current6.0A8.0A8.0A8.0A — Higher trip current.; BSMD1812-400-6V: Higher trip current.
Power2.0W2.0W-2.0W — Power dissipation is matched.

Application & sourcing insights

Questions & answers

BSMD1812-400-12V is a strong candidate, offering a higher voltage rating (12V) with a very similar hold current (4.0A) in the same 1812 package.