component

SS8550W

Public Made by Adom

by adom

TWGMC Bipolar (BJT), SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 22d ago
viewers ss8550w: viewers · Ray 22d ago
package.json Publish 0.1.0 · Ray 22d ago
page.json ss8550w: specified limits as data (metadata.characteristics, 20 rows from the datasheet) · Ray 16d ago
README.md ss8550w: specified limits as data (metadata.characteristics, 20 rows from the datasheet) · Ray 16d ago
ss8550w-etched.glb ss8550w: factory component page (tier=lcsc) · Ray 22d ago
ss8550w-etched.step ss8550w: factory component page (tier=lcsc) · Ray 22d ago
ss8550w-hero.glb ss8550w: hero GLB from the etched model (keeps the MPN mark) · Ray 22d ago
ss8550w-hero.overlay.json Publish 0.1.0 · Ray 22d ago
ss8550w.glb Publish 0.1.0 · Ray 22d ago
ss8550w.kicad_mod Publish 0.1.0 · Ray 22d ago
ss8550w.kicad_sym Publish 0.1.0 · Ray 22d ago
ss8550w.lbr Publish 0.1.0 · Ray 22d ago
ss8550w.step Publish 0.1.0 · Ray 22d ago

SS8550W

TWGMC · Bipolar (BJT) · SOT-323

SS8550W from TWGMC, in a SOT-323. 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; the emitter-base breakdown voltage is limited to -5 V (VEBO maximum rating -5 V) and the base-emitter saturation voltage is -1.2 V at IC=-800mA, IB=-80mA.
2 EMITTER passive Emitter terminal of the PNP transistor; the emitter-base breakdown voltage V(BR)EBO is -5 V minimum at IE=-100µA, and VEBO is rated at -5 V.
3 COLLECTOR passive Collector terminal of the PNP transistor; rated for -1.5 A continuous collector current, VCEO -25 V, VCBO -40 V, and 0.2 W collector power dissipation.

Key specifications

Parameter Value
Manufacturer TWGMC
Package SOT-323
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-base breakdown voltage V(BR)CBO -40 V IC=-100µA, IE=0 1
Collector-emitter breakdown voltage V(BR)CEO -25 V IC=-0.1mA, IB=0 1
Emitter-base breakdown voltage V(BR)EBO -5 V IE=-100µA, IC=0 1
Collector cut-off current ICBO -0.1 µA VCB=-40V, IE=0 1
Emitter cut-off current IEBO -0.1 µA VEB=-5V, IC=0 1
DC current gain hFE(1) 120 400 VCE=-1V, IC=-100mA 1
DC current gain hFE(2) 40 VCE=-1V, IC=-800mA 1
Collector-emitter saturation voltage VCE(sat) -0.5 V IC=-800mA, IB=-80mA 1
Base-emitter saturation voltage VBE(sat) -1.2 V IC=-800mA, IB=-80mA 1
Base-emitter on voltage VBE(on) -1 V IC=-1V, VCE=-10mA 1
Base-emitter positive favor voltage VBEF -1.55 V IB=-1A 1
Transition frequency fT 100 MHz VCE= -10V, IC= -50mA, f=30MHz 1
Output capacitance Cob 20 pF VCB=-10V, IE=0, f=1MHz 1
Collector-emitter voltage VCEO -25 V 1
Collector-base voltage VCBO -40 V 1
Emitter-base voltage VEBO -5 V 1
Collector current, continuous IC -1.5 A 1
Collector power dissipation PC 0.2 W 1
Junction temperature Tj 150 ℃ 1
Storage temperature Tstg -55 150 ℃ 1

CAD (KiCad official)

  • Symbol: SS8550W
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323 (KiCad packages3D, STEP)
  • 3D model files: ss8550w-etched.step / ss8550w-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ss8550w.step / ss8550w.glb are the bare package body.

Provenance

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

  • Datasheet: TWGMC datasheet (3 pp, sha256 fd00ca2500b299d0, retrieved 2026-10-09, 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