component

BC556BBK

Public Made by Adom

by adom

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

componenttransistors-thyristorsbc556bbkfactory-2.0.0extractor-text
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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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BC556BBK

DIOTEC · Bipolar (BJT) · TO-92

BC556BBK from DIOTEC, 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 C passive Collector of the PNP transistor; maximum collector current is -100 mA DC (-200 mA peak) and VCEO is -65 V for the BC556.
2 B passive Base of the PNP transistor; peak base current is limited to 200 mA and VEBO to 5 V.
3 E passive Emitter of the PNP transistor; peak emitter current is limited to 200 mA.

Key specifications

Parameter Value
Manufacturer DIOTEC
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
DC current gain, Group B, IC = -2 mA hFE 200 450 VCE = -5 V, IC = -2 mA, Group B 2
Collector-Emitter cutoff current, Tj = 25°C, BC556 ICES 0.2 15 nA VCE = -80 V, B-E short, BC556 2
Collector-Emitter cutoff current, Tj = 125°C, BC556 ICES 4 µA Tj = 125°C, VCE = -80 V, B-E short, BC556 2
Collector-Emitter saturation voltage, 10 mA / 0.5 mA VCEsat 80 300 mV IC = -10 mA, IB = -0.5 mA 2
Collector-Emitter saturation voltage, 100 mA / 5 mA VCEsat 250 650 mV IC = -100 mA, IB = -5 mA 2
Base-Emitter voltage, 2 mA VBE 600 660 750 mV VCE = -5 V, IC = -2 mA 2
Base-Emitter voltage, 10 mA VBE 820 mV VCE = -5 V, IC = -10 mA 2
Collector-Base capacitance CCBO 3.5 6 pF VCB = -10 V, IE = ie = 0, f = 1 MHz 2
Noise figure, BC556 to BC558 F 2 10 dB VCE = -5 V, IC = -200 µA, RG = 2 kΩ, f = 1 kHz, Δf = 200 Hz 2
Collector-Emitter voltage, E-B short (BC556) VCES 80 V E-B short 1
Collector-Emitter voltage, B open (BC556) VCEO 65 V B open 1
Collector-Base voltage, E open (BC556) VCBO 80 V E open 1
Emitter-Base voltage VEBO 5 V C open 1
Power dissipation Ptot 500 mW Valid if leads kept at TA at 2 mm distance from case 1
Collector current DC IC 100 mA DC 1
Peak collector current ICM 200 mA 1
Peak base current IBM 200 mA 1
Peak emitter current IEM 200 mA 1
Junction temperature Tj -55 150 °C 1
Storage temperature TS -55 150 °C 1
Typical thermal resistance junction to ambient RthA 200 K/W Valid if leads kept at ambient temperature at 2 mm distance from case 2

CAD (KiCad official)

  • Symbol: BC556BBK
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: bc556bbk-etched.step / bc556bbk-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bc556bbk.step / bc556bbk.glb are the bare package body.

Provenance

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

  • Datasheet: DIOTEC datasheet (4 pp, sha256 f2051b60b559de98, retrieved 2026-10-10, 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