Skip to the content
PCBKitNew board
BD139 on a board, in 3D

BD139

STMicroelectronics

-65℃~+150℃ 1 NPN 1.5A 10uA 12.5W 500mV 5V 63 80V NPN TO-126 Bipolar (BJT) ROHS

Extended
DatasheetJLCPCBLCSCst/BD139
Category
Bipolar (BJT)
Package
TO-126
Pins
3

Overview

The BD139 is a bipolar made by STMicroelectronics in a TO-126 package with 3 pins. -65℃~+150℃ 1 NPN 1.5A 10uA 12.5W 500mV 5V 63 80V NPN TO-126 Bipolar (BJT) ROHS.

PCBKit's library has its KiCad symbol (Transistor_BJT:BD139, from KiCad's library) and its footprint (Package_TO_SOT_THT:TO-126-3_Vertical, from KiCad's library), ready for a KiCad board. 11,001 are in stock at JLCPCB (part C27866). 104 open-source boards in 80 repositories on GitHub use it.

Symbol

123
Transistor_BJT:BD139From KiCad's library

Footprint

123
Package_TO_SOT_THT:TO-126-3_VerticalFrom KiCad's library

From the datasheet

7
Collector-emitter, most
80 V · Collector-emitter voltage, absolute max, IB = 0 · p. 3
Collector current, most
1.5 A · Collector current, absolute max · p. 3
Junction, hottest
150 °C · Operating junction temperature, max · p. 3
Junction to case (SOT-32)
10 K/W · Junction-case thermal resistance, max · p. 3
Junction to air (SOT-32)
100 K/W · Junction-ambient thermal resistance, max · p. 3
Current gain, least
25 · DC current gain, min, IC = 5 mA, VCE = 2 V · p. 4
Current gain, least
40 · DC current gain, min, IC = 150 mA, VCE = 2 V · p. 4

What it is and has

1
DC current gain selection
Products are pre-selected in DC current gain · p. 1

Specifications

21
ParameterConditionsAs printedPage
Collector-base voltage (IE = 0) VCBOBD139max 80 V3
Collector-emitter voltage (IB = 0) VCEOBD139max 80 V3
Emitter-base voltage (IC = 0) VEBOBD139, NPNmax 5 V3
Collector current ICBD139, NPNmax 1.5 A3
Collector peak current ICMBD139, NPNmax 3 A3
Base current IBBD139, NPNmax 0.5 A3
Total dissipation at Tc ≤ 25 °C PTOTTc ≤ 25 °Cmax 12.5 W3
Total dissipation at Tamb ≤ 25 °C PTOTTamb ≤ 25 °Cmax 1.25 W3
Storage temperature Tstgmin -65 · max 150 °C3
Max. operating junction temperature Tjmax 150 °C3
Thermal resistance junction-case Rthj-caseSOT-32max 10 °C/W3
Thermal resistance junction-ambient Rthj-ambSOT-32max 100 °C/W3
Collector cut-off current (IE=0) ICBONPN; VCB = 30 V; Tcase = 25 °Cmax 0.1 uA4
Collector cut-off current (IE=0) ICBONPN; VCB = 30 V, TC = 125 °Cmax 10 uA4
Emitter cut-off current (IC=0) IEBONPN; VEB = 5 V; Tcase = 25 °Cmax 10 uA4
Collector-emitter sustaining voltage (IB=0) VCEO(sus)BD139, NPN; IC = 30 mA; Tcase = 25 °C; pulsed: pulse duration = 300 us, duty cycle 1.5%min 80 V4
Collector-emitter saturation voltage VCE(sat)NPN; IC = 0.5 A, IB = 0.05 A; Tcase = 25 °C; pulsed: pulse duration = 300 us, duty cycle 1.5%max 0.5 V4
Base-emitter voltage VBENPN; IC = 0.5 A, VCE = 2 V; Tcase = 25 °C; pulsed: pulse duration = 300 us, duty cycle 1.5%max 1 V4
DC current gain hFENPN; IC = 5 mA, VCE = 2 V; Tcase = 25 °C; pulsed: pulse duration = 300 us, duty cycle 1.5%min 254
DC current gain hFENPN; IC = 150 mA, VCE = 2 V; Tcase = 25 °C; pulsed: pulse duration = 300 us, duty cycle 1.5%min 40 · max 2504
DC current gain hFENPN; IC = 0.5 A, VCE = 2 V; Tcase = 25 °C; pulsed: pulse duration = 300 us, duty cycle 1.5%min 254

Ordering codes, by the datasheet

3
BD139
SOT-32 · Tube packaging; ungrouped DC current gain · p. 1
BD139-10
SOT-32 · Tube packaging; hFE group 63–160 at IC = 150 mA, VCE = 2 V · p. 1
BD139-16
SOT-32 · Tube packaging; hFE group 100–250 at IC = 150 mA, VCE = 2 V · p. 1

Parameters

14
Collector - Emitter Voltage VCEO
80V
Configuration
Standalone
Current - Collector Cutoff
10uA
Current - Collector(Ic)
1.5A
DC Current Gain
63
Emitter-Base Voltage(Vebo)
5V
Junction Temperature(Max)
150℃
Number
1 NPN
Operating Temperature
-65℃~+150℃
Pd - Power Dissipation
12.5W
Thermal Resistance(Junction to Ambient)
100℃/W
Thermal Resistance(Junction to Case)
10℃/W
Vce Saturation(VCE(sat))
500mV
type
NPN

Order codes

1

Pinout

3
The pins of the BD139
PinNameType
1EPassive
2CPassive
3BInput

Open-source boards using it

All 104
  • 2 layersESP32Anglerfish, the printed circuit board in 3D

    ESP32Anglerfish

    Matchboxscope/Matchboxscope

    ESP32-based mini microscope for fluidic device observation

    7 parts103
  • 2 layers49.8 × 63 mmPiHat, the printed circuit board in 3D

    PiHat

    joelkoz/QwicktracePCB

    UI for PCB smart exposure table

    15 parts16MIT
  • 2 layers100 × 100 mmAmply, the printed circuit board in 3D

    Amply

    T76-org/amply

    A $10 desktop Bluetooth amplifier you'll love

    67 parts14GPL-3.0
  • 2 layers84.5 × 82.6 mmClassab amp, the printed circuit board in 3D

    Classab amp

    prydin/classab-amp-mosfet

    MOSFET-based 50W Class AB amplifier

    67 parts9
  • 2 layers100 × 79 mmPower board, the printed circuit board in 3D

    Power board

    Dominik-Workshop/dw3005t

    Linear power supply, with digital control

    23 parts8GPL-3.0
  • 2 layers95.9 × 112.6 mmLab supply, the printed circuit board in 3D

    Lab supply

    prydin/lab-supply

    Linear 0-30V, 2A lab supply

    90 parts8
  • 2 layers40 × 99 mmOutput mixer, the printed circuit board in 3D

    Output mixer

    mohoyt/output_mixer

    Simple 4 channel Eurorack output mixer

    114 parts7CERN-OHL-S-2.0
  • 2 layers135.8 × 56.1 mmPower board, the printed circuit board in 3D

    Power board

    xtarke/automated_buggy

    This shield connects microcontroller (MSP-EXP430FR2355) pins to the car's power board. Go to Power Board for more hardware information.

    87 parts5GPL-3.0

Show this part on your page

A live frame, for any web page
<iframe src="https://pcbkit.io/embed/parts/st/BD139" title="BD139 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>
A picture
<img src="https://pcbkit.io/embed/parts/st/BD139.jpg" alt="BD139" width="1200" height="900">
A picture that opens the part, for a README
[![BD139](https://pcbkit.io/embed/parts/st/BD139.jpg?size=s)](https://pcbkit.io/parts/st/BD139)

Questions

Is there a KiCad symbol and footprint for the BD139?

Yes. The symbol is Transistor_BJT:BD139 and the footprint Package_TO_SOT_THT:TO-126-3_Vertical, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the BD139?

TO-126, with 3 pins. Its footprint is drawn on this page.

Where is the BD139 datasheet?

STMicroelectronics publishes it: the Datasheet link on this page opens it.

Where can I order the BD139?

JLCPCB lists it as part C27866, with 11,001 in stock; the sellers' links on this page open their listings.

What can replace the BD139?

Parts like it in the library: the BD139-16 by STMicroelectronics, the BD237 by Jiangsu Changjing Electronics Technology (CJ), the BD139 by onsemi and the BD441 by onsemi. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the BD139?

104 boards in 80 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8