component

BC548A

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-thyristorsbc548afactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
bc548a / README.md
History Download
Ray Publish 0.1.0 7fad738 16d ago

BC548A

DIOTEC · Bipolar (BJT) · TO-92

BC548A 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; VCEO max 30 V and DC collector current IC max 100 mA (200 mA peak) for BC548.
2 B input Base; emitter-base voltage VEBO max 5 V and peak base current IBM max 200 mA.
3 E passive Emitter; peak emitter current IEM max 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
Collector-Emitter voltage (E-B short) VCES 30 V E-B short 1
Collector-Emitter voltage (B open) VCEO 30 V B open 1
Collector-Base voltage VCBO 30 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 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
Thermal resistance junction to ambient RthA 200 K/W Valid if leads kept at ambient temperature at a distance of 2 mm from case 2
DC current gain Group A hFE 110 220 VCE = 5 V, IC = 2 mA, Group A 2
Collector-Emitter saturation voltage VCEsat 80 250 mV IC = 10 mA, IB = 0.5 mA 2
Collector-Emitter saturation voltage VCEsat 200 600 mV IC = 100 mA, IB = 5 mA 2
Base-Emitter-voltage VBE 580 660 700 mV VCE = 5 V, IC = 2 mA 2
Base-Emitter-voltage VBE 770 mV VCE = 5 V, IC = 10 mA 2
Collector-Emitter cutoff current ICES 0.2 15 nA VCE = 30 V, B-E short, BC548/BC549, Tj = 25°C 2
Collector-Emitter cutoff current ICES 4 µA VCE = 30 V, B-E short, BC548/BC549, Tj = 125°C 2
DC current gain Group A hFE 90 VCE = 5 V, IC = 10 µA, Group A 2
DC current gain Group A hFE 120 IC = 100 mA, Group A 2
Base-Emitter saturation voltage VBEsat 700 mV IC = 10 mA, IB = 0.5 mA 2
Base-Emitter saturation voltage VBEsat 900 mV IC = 100 mA, IB = 5 mA 2
Gain-Bandwidth Product fT 300 MHz VCE = 5 V, IC = 10 mA, f = 100 MHz 2
Collector-Base Capacitance CCBO 3.5 6 pF VCB = 10 V, IE = ie = 0, f = 1 MHz 2
Emitter-Base Capacitance CEBO 9 pF VEB = 0.5 V, IC = ic = 0, f = 1 MHz 2
Noise figure F 2 10 dB VCE = 5 V, IC = 200 µA, RG = 2 kΩ, f = 1 kHz, Δf = 200 Hz 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts silver affect human life or health, user shall contact in advance Diotec Semiconductor AG's Managing Board (Heitersheim, Germany) to 4

CAD (KiCad official)

  • Symbol: BC548A
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: bc548a-etched.step / bc548a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bc548a.step / bc548a.glb are the bare package body.

Provenance

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

  • Datasheet: DIOTEC datasheet (4 pp, sha256 10a6b5162050d1ce, retrieved 2026-10-19, 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