ProjectsPricingInsights

Best Alternatives to BCP56

Package: TO-261-4, TO-261AAonsemiTransistors - Bipolar (BJT) - SinglePackage: BulkCurrent - Collector (Ic) (Max): 1.2 AVoltage - Collector Emitter Breakdown (Max): 80 VCurrent - Collector Cutoff (Max): 100nA (ICBO)DC Current Gain (hFE) (Min) @ Ic, Vce: 40 @ 150mA, 2V

BCP56 is an 80V, 1A NPN BJT in SOT-223. Alternatives need pinout, SOA, and voltage-margin review.

AI replacement insight

Electrical riskmedium

check SOA, gain, and Vce(sat)

Package riskmedium

SOT-223 matches but pin functions missing

Firmware risklow

discrete BJT, no firmware

Sourcing riskmedium

lifecycle data is mixed

Can it be replaced directly?

No verified pin-compatible replacement is proven from the provided fields.

Best replacement path

Review FZT853 first for stronger ratings, then confirm pinout and thermal fit.

Main risk

Pinout is not evidenced, and lower-voltage options may fail stress margin.

Recommended alternatives

1
FZT853 package
FZT853

Diodes Incorporated

Needs validationmedium risk

FZT853 is a stronger NPN SOT-223 candidate for BCP56, pending pinout review.

View details

Alternative comparison matrix

Feature / factorBCP56FZT853BCP55-16Alt 3Compatibility / risk
PackageSOT-223SOT-223SOT-223SOT-223 — same package name; BCP55-16: same package name
Pinout4 pins4 pins4 pins4 pins — functions missing; BCP55-16: functions missing
Voltage80V100V60V100V / 60V — meets stress rule; BCP55-16: not for 80V rails
Current1A6A1A6A / 1A — higher Ic; BCP55-16: same Ic
Power1.5W3W1.5W3W / 1.5W — higher Pd; BCP55-16: same Pd
Temperature-55..150C-55..150C--55..150C — range matches

Application & sourcing insights

Questions & answers

FZT853 is the strongest kept candidate by ratings, but pinout and thermal fit still need FAE review.