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BCP51-MS

Public Made by Adom

by adom

MSKSEMI Bipolar Transistors - BJT, SOT-223. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BCP51-MS

MSKSEMI · Bipolar Transistors - BJT · SOT-223

BCP51-MS from MSKSEMI, in a SOT-223. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 BASE input Base terminal of the PNP transistor, where the base-emitter voltage VBE is specified as -1 V max at VCE=-2V and IC=-500mA.
2 COLLECTOR passive Collector terminal of the PNP transistor, rated for a continuous collector current of -1 A with a collector-emitter voltage of -45 V to -80 V depending on variant.
3 EMITTER passive Emitter terminal of the PNP transistor, rated for an emitter-base voltage of -5 V.

Key specifications

Parameter Value
Manufacturer MSKSEMI
Package SOT-223
Category Triode/MOS Tube/Transistor
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Collector-base breakdown voltage V(BR)CBO -45 V IC=- 0.1mA,IE=0 2
Collector-emitter breakdown voltage V(BR)CEO -45 V IC= -10mA,IB=0 2
Base-emitter breakdown voltage V(BR)EBO -5 V IE= -10μA,IC=0 2
Collector cut-off current ICBO -100 nA VCB= -30 V, IE=0 2
DC current gain hFE(1) hFE(1) 25 VCE=-2V, IC=-5mA 2
DC current gain hFE(2) hFE(2) 63 250 VCE= -2V, IC=-150m A 2
DC current gain hFE(3) hFE(3) 25 VCE= -2V, IC=-500m A 2
Collector-emitter saturation voltage VCE(sat) -0.5 V IC=-500mA,IB=-50mA 2
Base-emitter voltage VBE -1 V VCE=-2V, IC=-500m A 2
Transition frequency fT 100 MHz VCE=-10V,IC=-50mA,f=100MHz 2
Collector-base voltage VCBO -45 V 2
Collector-emitter voltage VCEO -45 V 2
Emitter-base voltage VEBO -5 V 2
Collector current continuous IC -1 A 2
Collector power dissipation PC 1.5 W 2
Storage temperature range Tstg -65 150 ℃ 2
Thermal resistance junction to ambient RθJA 94 ℃/W 2

CAD (KiCad official)

  • Symbol: BCP51-MS
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)
  • 3D model files: bcp51-ms-etched.step / bcp51-ms-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bcp51-ms.step / bcp51-ms.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: MSKSEMI datasheet (5 pp, sha256 5df8b8e03f08ddb8, retrieved 2026-10-27, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus off (skipped (clean text read)), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF