component

8550S-TA

Public Made by Adom

by adom

Changjing Bipolar (BJT), TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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8550S-TA

Changjing · Bipolar (BJT) · TO-92

8550S-TA from Changjing, in a TO-92. 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 EMITTER passive Emitter of the 8550S PNP transistor, with emitter-base voltage limited to VEBO = -5 V.
2 COLLECTOR passive Collector of the 8550S PNP transistor, rated for -500 mA continuous collector current and VCBO = -40 V.
3 BASE passive Base of the 8550S PNP transistor, with emitter-base breakdown voltage V(BR)EBO of -5 V minimum.

Key specifications

Parameter Value
Manufacturer Changjing
Package TO-92
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 voltage VCBO -40 V 1
Collector-emitter voltage VCEO -25 V 1
Emitter-base voltage VEBO -5 V 1
Collector current, continuous IC -500 mA 1
Collector dissipation PC 625 mW 1
Operation junction and storage temperature range TJ,Tstg -55 150 ℃ 1
Collector-base breakdown voltage V(BR)CBO -40 V IC= -100uA, IE=0 2
Collector-emitter breakdown voltage V(BR)CEO -25 V IC= -1mA, IB=0 2
Emitter-base breakdown voltage V(BR)EBO -5 V IE= -100uA, IC=0 2
Collector cut-off current ICBO -0.1 uA VCB= -40V, IE=0 2
Emitter cut-off current IEBO -0.1 uA VEB= - 3V, IC=0 2
DC current gain hFE(1) 85 400 VCE= -1V, IC= -50mA 2
DC current gain hFE(2) 50 VCE= -1V, IC= -500mA 2
Collector-emitter saturation voltage VCE(sat) -0.6 V IC=-500mA, IB=-50mA 2
Base-emitter saturation voltage VBE(sat) -1.2 V IC=-500mA, IB=-50mA 2
Transition frequency fT 150 MHz VCE=- 6V, IC=-20mA, f =30MHz 2

CAD (KiCad official)

  • Symbol: 8550S-TA
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: 8550s-ta-etched.step / 8550s-ta-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 8550s-ta.step / 8550s-ta.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (5 pp, sha256 3005d333cca1948f, retrieved 2026-10-18, 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