ProjectsPricingInsights

Best Alternatives to MMBT5401

Package: TO-236-3, SC-59, SOT-23-3onsemiTransistors - Bipolar (BJT) - SinglePackage: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Current - Collector (Ic) (Max): 600 mAVoltage - Collector Emitter Breakdown (Max): 150 VCurrent - Collector Cutoff (Max): 50nA (ICBO)DC Current Gain (hFE) (Min) @ Ic, Vce: 60 @ 10mA, 5V

MMBT5401 is an obsolete high-voltage PNP SOT-23 transistor. The reviewed list has no safe direct replacement evidence.

AI replacement insight

Electrical riskhigh

No candidate meets target V/I ratings.

Package riskmedium

SOT-23 matches do not prove pinout.

Firmware risklow

Discrete BJT has no firmware.

Sourcing riskhigh

Target is obsolete.

Can it be replaced directly?

No pin-compatible replacement is verified from these candidates.

Best replacement path

Search for an active PNP SOT-23 BJT with at least 150 V VCEO, 0.6 A IC, 300 mW PC, and confirmed pinout.

Main risk

Most candidates are wrong polarity or under-rated.

Recommended alternatives

1
2SA1037-R package
2SA1037-R

Yangjie Technology

Needs validationhigh risk

2SA1037-R is only a low-rating PNP fallback for MMBT5401.

View details

Alternative comparison matrix

Feature / factorMMBT54012SA1037-RAlt 2Alt 3Compatibility / risk
PackageSOT-23SOT-23SOT-23 — same outline
Pinout3-pin BJT3-pin BJT3-pin BJT — pin functions not shown
Voltage-150 V VCEO-50 V VCEO-50 V VCEO — far lower rating
Current-0.6 A-0.15 A-0.15 A — large derating
Power300 mW200 mW200 mW — lower dissipation

Application & sourcing insights

Questions & answers

None of the reviewed candidates is a safe direct alternative. Look for an active PNP SOT-23 with equal or higher ratings.