component

S8550W

Public Made by Adom

by adom

CBI Bipolar (BJT), SOT323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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S8550W

CBI · Bipolar (BJT) · SOT323

S8550W from CBI, in a SOT323. 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, with emitter-base voltage limited to VEBO -5 V and VBE(sat) of -1.2 V at IC=-500 mA, IB=-50 mA.
2 EMITTER passive Emitter terminal of the PNP transistor, with emitter-base breakdown V(BR)EBO of -5 V minimum at IE=-100 µA and emitter cut-off current IEBO of -0.1 µA maximum at VEB=-3 V.
3 COLLECTOR passive Collector terminal, rated for continuous collector current IC of -0.5 A, VCEO of -25 V, VCBO of -40 V, and collector power dissipation PC of 0.3 W.

Key specifications

Parameter Value
Manufacturer CBI
Package SOT323
Category Transistors/Thyristors
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-emitter saturation voltage VCE(sat) -0.6 V IC=-500mA, IB= -50mA 1
Base-emitter saturation voltage VBE(sat) -1.2 V IC=-500mA, IB= -50mA 1
Collector cut-off current ICBO -0.1 µA VCB= -40V, IE=0 1
Emitter cut-off current IEBO -0.1 µA VEB= -3V, IC=0 1
DC current gain hFE(1) 120 400 VCE= -1V, IC= -50mA 1
DC current gain hFE(2) 50 VCE= -1V, IC= -500mA 1
Collector-base breakdown voltage V(BR)CBO -40 V IC = -100µA, IE=0 1
Collector-emitter breakdown voltage V(BR)CEO -25 V IC =-1mA, IB=0 1
Emitter-base breakdown voltage V(BR)EBO -5 V IE= -100µA, IC=0 1
Transition frequency fT 150 MHz VCE= -6V, IC= -20mA, f=30MHz 1
Collector-base voltage VCBO -40 V 1
Collector-emitter voltage VCEO -25 V 1
Emitter-base voltage VEBO -5 V 1
Collector current, continuous IC -0.5 A 1
Collector power dissipation PC 0.3 W 1
Junction temperature Tj 150 ℃ 1
Storage temperature Tstg -55 150 ℃ 1

CAD (KiCad official)

  • Symbol: S8550W
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT323 (KiCad packages3D, STEP)
  • 3D model files: s8550w-etched.step / s8550w-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); s8550w.step / s8550w.glb are the bare package body.

Provenance

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

  • Datasheet: CBI datasheet (3 pp, sha256 c663af5ea3460fcd, retrieved 2026-10-19, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), 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