component

BC817

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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BC817

Changjing · Bipolar (BJT) · SOT-23

BC817 from Changjing, in a SOT-23. 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 of the NPN transistor; emitter-base voltage is limited to 5 V (VEBO) and VBE(sat) is max 1.2 V at IC=500 mA, IB=50 mA.
2 EMITTER passive Emitter of the NPN transistor; carries the full collector current up to 0.5 A continuous with 5 V maximum emitter-base voltage.
3 COLLECTOR passive Collector of the NPN transistor; rated 45 V collector-emitter (VCEO), 50 V collector-base (VCBO), 0.5 A continuous current and 0.3 W dissipation.

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 Voltage VCBO 50 V 1
Collector-Emitter Voltage VCEO 45 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
Collector-emitter breakdown voltage VCEO 45 V IC= 10mA, IB=0 1
Collector-base breakdown voltage VCBO 50 V IC= 10μA, IE=0 1
Emitter-base breakdown voltage VEBO 5 V IE= 1μA, IC=0 1
Collector cutoff current ICBO 0.1 μA VCB= 45 V, IE=0 1
Emitter cutoff current IEBO 0.1 μA VEB= 4V, IC=0 1
DC current gain hFE(1) hFE(1) 100 600 VCE= 1V, IC= 100mA 1
DC current gain hFE(2) hFE(2) 40 VCE= 1V, IC= 500mA 1
Collector-emitter saturation voltage VCE(sat) 0.7 V IC= 500mA, IB= 50mA 1
Base-emitter saturation voltage VBE(sat) 1.2 V IC= 500mA, IB= 50mA 1
Base-emitter voltage VBE 1.2 V VCE= 1 V, IC= 500mA 1
Collector capacitance Cob 10 pF VCB=10V, f=1MHz 1
Transition frequency fT 100 MHz VCE= 5 V, IC= 10mA, f=100MHz 1

CAD (KiCad official)

  • Symbol: BC817
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: bc817-etched.step / bc817-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bc817.step / bc817.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (2 pp, sha256 39de72837d9ca295, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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