component

BC546

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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BC546

Changjing · Bipolar (BJT) · TO-92

BC546 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 COLLECTOR passive Collector terminal of the TO-92 package; the datasheet rates continuous collector current at 0.1 A and collector-emitter voltage at 65 V for BC546 (45 V BC547, 30 V BC548).
2 BASE passive Base terminal of the TO-92 package; the datasheet specifies emitter-base voltage of 6 V for BC546 and BC547 and 5 V for BC548.
3 EMITTER passive Emitter terminal of the TO-92 package; the datasheet specifies emitter-base voltage of 6 V for BC546 and BC547 and 5 V for BC548, with a maximum junction temperature of 150 ℃.

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-emitter voltage (maximum rating, BC546) VCEO 65 V 1
Collector-base voltage (maximum rating, BC546) VCBO 80 V 1
Emitter-base voltage (maximum rating, BC546) VEBO 6 V 1
Collector current-continuous IC 0.1 A 1
Collector power dissipation PC 625 mW 1
Thermal resistance from junction to ambient RθJA 200 ℃/W 1
Junction temperature Tj 150 ℃ 1
Storage temperature Tstg -55 150 ℃ 1
Collector-base breakdown voltage (BC546) V(BR)CBO 80 V IC=0.1mA,IE=0 2
Collector-emitter breakdown voltage (BC546) V(BR)CEO 65 V IC=1mA,IB=0 2
Emitter-base breakdown voltage (BC546) V(BR)EBO 6 V IE=10μA,IC=0 2
Collector cut-off current (BC546) ICBO 0.1 μA VCB=70V,IE=0 2
Emitter cut-off current IEBO 0.1 μA VEB=5V,IC=0 2
DC current gain hFE 110 800 VCE=5V, IC=2mA 2
Collector-emitter saturation voltage VCE(sat) 0.3 V IC=100mA,IB=5mA 2
Base-emitter saturation voltage VBE(sat) 1.1 V IC=100mA,IB=5mA 2
Base-emitter voltage VBE 0.58 0.7 V VCE=5V, IC=2mA 2
Base-emitter voltage VBE 0.75 V VCE=5V, IC=10mA 2
Collector output capacitance Cob 4.5 pF VCB=10V,IE=0, f=1MHz 2
Transition frequency fT 150 MH VCE=5V,IC=10mA, f=100MHz 2

CAD (KiCad official)

  • Symbol: BC546
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: bc546-etched.step / bc546-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bc546.step / bc546.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (4 pp, sha256 696f5cda7b5daf11, retrieved 2026-10-17, 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