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SS8550 Y2

Public Made by Adom

by adom

Changjing Bipolar (BJT), SOT-23. 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 ss8550-y2: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers ss8550-y2: viewers · Ray 1mo ago
package.json ss8550-y2: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json ss8550-y2: specified limits as data (metadata.characteristics, 20 rows from the datasheet) · Ray 23d ago
README.md ss8550-y2: specified limits as data (metadata.characteristics, 20 rows from the datasheet) · Ray 23d ago
ss8550-y2-etched.fit.json ss8550-y2: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
ss8550-y2-etched.glb ss8550-y2: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
ss8550-y2-etched.step ss8550-y2: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
ss8550-y2.glb Publish 0.1.0 · Ray 1mo ago
ss8550-y2.kicad_mod Publish 0.1.0 · Ray 1mo ago
ss8550-y2.kicad_sym Publish 0.1.0 · Ray 1mo ago
ss8550-y2.lbr Publish 0.1.0 · Ray 1mo ago
ss8550-y2.step Publish 0.1.0 · Ray 1mo ago

SS8550 Y2

Changjing · Bipolar (BJT) · SOT-23

SS8550 Y2 from Changjing, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 BASE input Base control terminal for transistor conduction.
2 EMITTER power_in Emitter terminal connected to positive supply voltage, maximum VEBO -5 V.
3 COLLECTOR output Collector terminal with maximum collector current -1.5 A at 25 °C.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-23
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 -100 nA VCB=-40V, IE=0 1
Emitter cut-off current IEBO -100 nA VEB=-5V, IC=0 1
DC current gain hFE(1) hFE(1) 120 400 VCE=-1V, IC=-100mA 1
DC current gain hFE(2) 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 voltage VBE -1 V VCE=-1V, IC=-10mA 1
Transition frequency fT 100 MHz VCE=-10V, IC=-50mA, f=30MHz 1
Collector output capacitance Cob 20 pF VCB=-10V, IE=0, f=1MHz 1
Collector-base voltage VCBO -40 V 1
Collector-emitter voltage VCEO -25 V 1
Emitter-base voltage VEBO -5 V 1
Collector current IC -1.5 A 1
Collector power dissipation PC 300 mW 1
Junction temperature Tj 150 ℃ 1
Storage temperature Tstg -55 150 ℃ 1
Thermal Resistance From Junction To Ambient RΘJA 417 ℃/W 1

CAD (KiCad official)

  • Symbol: SS8550 Y2
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ss8550-y2-etched.step / ss8550-y2-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ss8550-y2.step / ss8550-y2.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (2 pp, sha256 27fbb2c399ee13c4, retrieved 2026-09-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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