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Best Alternatives to MMBTA42

Package: TO-236-3, SC-59, SOT-23-3Good-Ark SemiconductorBipolar (BJT)Series: -Package: Tape & Reel (TR) Cut Tape (CT) Digi-Reel®Current - Collector (Ic) (Max): 300 mAVoltage - Collector Emitter Breakdown (Max): 300 VCurrent - Collector Cutoff (Max): 250nA (ICBO)

MMBTA42 is a 300V, 500mA NPN BJT in SOT-23. Only cautious parametric alternatives are supported by the provided data.

AI replacement insight

Electrical riskmedium

MMBTA44 has lower IC.

Package riskmedium

Pinout not evidenced.

Firmware risklow

Discrete transistor.

Sourcing risklow

Kept part is active.

Can it be replaced directly?

No verified pin-compatible replacement is shown.

Best replacement path

Review MMBTA44 only for loads under 200mA and verified pinout.

Main risk

Most candidates lack the 300V rating or the 500mA current rating.

Recommended alternatives

1
MMBTA44 package
MMBTA44

Yangzhou Yangjie Electronic Technology Co.,Ltd

Needs validationmedium risk

MMBTA44 may fit low-current HV NPN uses after review.

View details

Alternative comparison matrix

Feature / factorMMBTA42MMBTA44Alt 2Alt 3Compatibility / risk
PackageSOT-23SOT-23SOT-23 — same package name
Pinout3 pins3 pins3 pins — pin functions not shown
Voltage300V400V400V — higher VCEO
Current500mA200mA200mA — needs derating
Power350mW350mW350mW — same listed PC

Application & sourcing insights

Questions & answers

From the provided candidates, MMBTA44 is the closest for low-current HV NPN use, but it needs FAE review.