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Best Alternatives to SMD1812P030TF

Package: 1812RUILONCircuit ProtectionOperating Voltage (Max): 30VHold Current: 300mATrip Current: 600mAMax Fault Current (Imax): 30AResistance (Rimin): 0.25 Ω

Find and compare suitable replacements for the RUILON SMD1812P030TF, a 30V, 0.3A PTC resettable fuse in an 1812 package. This guide analyzes key parametric differences to help you select a reliable alternative.

AI replacement insight

Electrical risklow

The best candidate (mSMD030-60V) has matching critical parameters and superior ratings.

Package risklow

All reviewed candidates use the same 1812 package as the target.

Can it be replaced directly?

Direct replacement for SMD1812P030TF should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The most promising replacement is mSMD030-60V due to its matching hold current and superior voltage rating.

Main risk

The primary risk is using a part with an incorrect hold current, which would compromise circuit protection. Several candidates were rejected for this reason.

Recommended alternatives

2
mSMD030-60V package
mSMD030-60V

TECHFUSE

Needs validationlow risk

Strong alternative with matching hold current, package, and a superior 60V voltage rating.

View details

Alternative comparison matrix

Feature / factorSMD1812P030TFmSMD030-60VmSMD050-33VAlt 3Compatibility / risk
Package1812181218121812 — Matches form factor.; mSMD050-33V: Matches form factor.
Voltage30V60V33V60V / 33V — Higher voltage rating provides more design margin.; mSMD050-33V: Slightly higher voltage rating.
Current30A100A0.5A100A / 0.5A — Higher max fault current rating.; mSMD050-33V: Hold current is 67% higher, reducing protection.
Resistance0.25Ω0.4Ω-0.4Ω — Slightly higher initial resistance may increase voltage drop.

Application & sourcing insights

Questions & answers

Verified drop-in options for SMD1812P030TF 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.