BD139 NPN Transistor
In stock (10)
What is this?
BD139 is a popular NPN transistor used in wide variety of electronic circuits, due to its high collector current and low cost it is an ideal transistor to be used in educational electronic projects and also in commercial electronics. It can drive loads upto 1.5A which is a good feature due to which you can drive many high current components such as high power LEDs, high current relays, motors etc. The collector emitter and collector base voltage is also very high therefore it can easily survive in an electronic circuit that is operated under 80 volts. The collector dissipation is 12.5W due to which it is also ideal to use it in audio amplifier circuits. The saturation voltage of the transistor is just 0.5V.
What can I build with it?
- General electronics and robotics prototyping
- Open AI Lab with “BD139 NPN Transistor” to explore a parts list
Compatibility notes
No verified pin/voltage metadata in our engineering catalog for this title. Treat electrical details as unverified until you check the datasheet.
Specifications
- BD139 NPN Transistor
- PNP Complementary of BD139 is BD140
- BD230, 2SC5171S , BD349, and BD379
- Switching Loads under 1.5A
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Listed from catalog data. Treat as merchant-provided, not independently lab-verified, unless noted above.
What else you may need
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Buying notes for Pakistan makers
Buy BD139 NPN Transistor online in Pakistan with live PKR pricing from Robotics Kits — a clear catalog alternative when comparing Hall Road Lahore, Digilog, and Electrobes for Electronics.
BD139 NPN Transistor suits ESP32, Arduino, robotics, IoT, and FYP builds; check real stock on Robotics Kits before you finalize a BOM or wiring plan.
Order BD139 NPN Transistor with COD or digital payment across Pakistan, then use AI Lab to plan compatible sensors, modules, and robotics parts around this component.
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