component

BD142

Public Made by Adom

by adom

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

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BD142

SPTECH · Bipolar (BJT) · TO-3

BD142 from SPTECH, in a TO-3. 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 B input Base; maximum base current 7 A and emitter-base voltage 7 V.
2 E passive Emitter; collector current up to 15 A continuous.
3 C passive Collector, connected to the metal case; VCBO 50 V, VCEO 45 V, IC 15 A continuous, 117 W dissipation at TC=25℃.

Key specifications

Parameter Value
Manufacturer SPTECH
Package TO-3
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 Breakdown Voltage V(BR)CEO 45 V IC=10mA; IB=0 2
Collector-Base Breakdown Voltage V(BR)CBO 50 V IC= 0.1mA; IE= 0 2
Collector-Emitter Saturation Voltage VCE(sat) 1.1 V IC= 4A; IB= 0.4A 2
Base-Emitter On Voltage VBE(on) 1.5 V IC= 4A; VCE= 4V 2
Collector Cutoff Current ICBO 100 uA VCB= 50V; IE= 0 2
Emitter Cutoff Current IEBO 1 mA VEB= 7V; IC= 0 2
DC Current Gain hFE-1 12.5 160 IC= 4A; VCE= 4V 2
DC Current Gain hFE-2 20 IC= 0.5A; VCE= 4V 2
Second Breakdown Collector Current with Base Forward Biased Is/b 3 A VCE= 39V,t= 1.0s,Nonrepetitive 2
Collector-Base Voltage VCBO 50 V Ta=25℃ 1
Collector-Emitter Voltage VCEO 45 V Ta=25℃ 1
Emitter-Base Voltage VEBO 7 V Ta=25℃ 1
Collector Current-Continuous IC 15 A Ta=25℃ 1
Base Current IB 7 A Ta=25℃ 1
Collector Power Dissipation PC 117 W TC=25℃ 1
Junction Temperature TJ 200 ℃ Ta=25℃ 1
Storage Temperature Tstg -65 200 ℃ Ta=25℃ 1
Thermal Resistance, Junction to Case Rth j-c 1.5 ℃/W 1

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
housing PC IB Base Current 7 A PC Collector Power Dissipation@TC=25℃ 117 W 1

CAD (KiCad official)

  • Symbol: BD142
  • Footprint: Package_TO_SOT_THT:TO-3
  • 3D model: TO-3 (KiCad packages3D, STEP)
  • 3D model files: bd142-etched.step / bd142-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bd142.step / bd142.glb are the bare package body.

Provenance

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

  • Datasheet: SPTECH datasheet (2 pp, sha256 a9db8707e503276d, 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