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BD140 PNP Power Transistor

Public Made by Adom

by adom

PNP medium-power transistor, 80 V / 1.5 A, the complement of the BD139 in TO-126.

transistorbjtpnpmedium-powerto-126st
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3D Model

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Symbol & Footprint

Schematic Symbol

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Datasheet

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Contents

README

markdown

BD140

STMicroelectronics · Bipolar Transistor (BJT) · TO-126

The BD140 is a PNP medium-power transistor rated for 80 V and 1.5 A continuous collector current in a TO-126 package. It is the complement of the NPN BD139, and the two are paired in class-AB audio output stages, complementary drivers, and general medium-power switching.

Pinout

Pin Name Type Function
1 E passive Emitter of the PNP BJT. Typical VCE(sat) = -0.5 V at IC = -0.5 A, IB = -0.05 A; VBE approximately -1 V at IC = -0.5 A, VCE = -2 V.
2 C passive Collector of the PNP BJT. Also electrically bonded to the metal mounting tab of the SOT-32/TO-126 package. Absolute maximum VCEO = -80 V, VCBO = -80 V, IC = -1.5 A continuous, ICM = -3 A peak.
3 B input Base of the PNP BJT. Drives collector current via hFE (typ. 40..250 at IC = -150 mA, VCE = -2 V). Absolute maximum VEBO = -5 V, IB = -0.5 A.

Key specifications

Parameter Value
Type PNP medium-power transistor
Collector-emitter voltage (VCEO) -80 V
Collector current (IC) -1.5 A continuous (-3 A peak)
DC current gain (hFE) 40 to 250
Transition frequency (fT) 75 MHz
Power dissipation 12.5 W
Operating temperature -55 C to 150 C

Ordering variants

  • BD140
  • BD140-10
  • BD140-16

CAD (KiCad official)

  • Symbol: bd140.kicad_sym
  • Footprint: bd140.kicad_mod
  • 3D model: TO-126 body from KiCad Package_TO_SOT_THT/TO-126-3_Vertical.
  • 3D model files: bd140-etched.step / bd140-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bd140.step / bd140.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (9 pp, sha256 9a72cdfa334700b8, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF