BD139 NPN Power Transistor 1.5A 80V TO-126
Prices updated: 12 Oct 2026
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| Store | product | Price | View in store |
|---|---|---|---|
 UGE | BD139 NPN medium 3A power transistor TO-126 | 6.84 EGP | View in store |
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Lowest price recorded: 6.84 EGP
About this product
The BD139 is a medium-power NPN bipolar transistor in a TO-126 plastic package, used for switching and amplification in audio stages, driver circuits and general power electronics. It handles up to 1.5 A continuous collector current and 80 V collector-emitter voltage, with a DC current gain (hFE) of 40 to 160.
Specifications
- Transistor type
- NPN
- Continuous collector current (IC)
- 1.5 A
- Collector-emitter voltage (VCEO)
- 80 V
- Collector-base voltage (VCBO)
- 80 V
- Emitter-base voltage (VEBO)
- 5 V
- DC current gain (hFE)
- 40 to 160
- Package
- TO-126
- Pinout
- 1 Emitter, 2 Collector, 3 Base
Frequently asked questions
What is the price of BD139 NPN Power Transistor 1.5A 80V TO-126 in Egypt?
BD139 NPN Power Transistor 1.5A 80V TO-126 currently costs 6.84 EGP in Egypt.
Where can I buy BD139 NPN Power Transistor 1.5A 80V TO-126 in Egypt?
BD139 NPN Power Transistor 1.5A 80V TO-126 is available from UGE. Compare the offers above to find the best price.
How do I wire the BD139 pins?
Pin 1 is the Emitter, pin 2 is the Collector and pin 3 is the Base. The emitter is normally connected to ground for a low-side switch, the collector to the load, and the base is driven through a series resistor.
How much base current does it need to switch a load from a microcontroller?
As a rough rule, the base current should be at least the collector current divided by the minimum hFE of 40. For a 1 A load, that is about 25 mA of base current. Use a base resistor sized to deliver that current from the microcontroller pin without exceeding its output limits.
