component

BC556B

Public Made by Adom

by adom

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

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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BC556B

LGE · Bipolar (BJT) · TO-92

BC556B from LGE, 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 terminal of the PNP device; the emitter-base voltage rating is VEBO = -5 V and the continuous collector current rating is -100 mA.
2 BASE passive Base terminal; base-emitter saturation voltage VBE(sat) is -1 V max at IC = -100 mA, IB = -5 mA.
3 COLLECTOR passive Collector terminal; rated up to VCBO = -80 V (BC556), VCEO = -65 V (BC556), IC = -100 mA continuous, and PC = 625 mW.

Key specifications

Parameter Value
Manufacturer LGE
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 breakdown voltage (BC556) VCBO -80 V IC= -100μA, IE=0 1
Collector-emitter breakdown voltage (BC556) VCEO -65 V IC= -2mA, IB=0 1
Emitter-base breakdown voltage VEBO -5 V IE= -100μA, IC=0 1
Collector cut-off current (BC556) ICBO -0.1 μA VCB=-70 V, IE=0 1
Emitter cut-off current (BC556) IEBO -0.1 μA VEB= -5 V, IC=0 1
DC current gain (BC556B/BC557B/BC558B) hFE 180 460 VCE=-5V, IC= -2mA 1
Collector-emitter saturation voltage VCE(sat) -0.65 V IC=-100mA, IB= -5mA 1
Base-emitter saturation voltage VBE(sat) -1 V IC= -100mA, IB=-5mA 1
Transition frequency fT 150 MHz VCE= -5V, IC= -10mA, f = 100MHz 1
Collector-base voltage (BC556) VCBO -80 V 1
Collector-emitter voltage (BC556) VCEO -65 V 1
Emitter-base voltage VEBO -5 V 1
Collector current, continuous IC -100 mA 1
Collector power dissipation PC 625 mW 1
Junction temperature TJ 150 ℃ 1
Storage temperature Tstg -55 150 ℃ 1

CAD (KiCad official)

  • Symbol: BC556B
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: bc556b-etched.step / bc556b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bc556b.step / bc556b.glb are the bare package body.

Provenance

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

  • Datasheet: LGE datasheet (4 pp, sha256 3f07b60d7056ca34, 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