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SKU: R3-F-4-5

BD139

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₹7.00 (Excluded Tax)
Total price: (Tax : )

Description:
The BD139 is a medium-power NPN bipolar junction transistor (BJT) designed for amplification and switching applications. It is widely used in audio amplifiers, driver stages, and power control circuits, offering higher current capability than small-signal transistors like BC547.

Specifications:

  • Type: NPN BJT Transistor
  • Collector-Emitter Voltage (Vce): 80V
  • Collector-Base Voltage (Vcb): 80V
  • Emitter-Base Voltage (Veb): 5V
  • Continuous Collector Current (Ic): up to 1.5A
  • Power Dissipation: ~12.5W
  • Current Gain (hFE): 40 – 250
  • Transition Frequency: ~190 MHz
  • Package: TO-126

Features:

  • Medium power transistor for higher current loads
  • Good gain for amplification and switching
  • Suitable for driver stages in amplifier circuits
  • Compact TO-126 package with heat dissipation capability
  • Reliable and widely used

Applications:

  • Audio amplifier driver stages
  • Complementary pair with BD140 (PNP)
  • Relay and motor drivers
  • Power switching circuits
  • Voltage regulation and control

Pin Configuration (Front side facing you):

  • Emitter (E)
  • Collector (C)
  • Base (B)

Important Note:

  • Suitable for medium current loads (up to ~1.5A)
  • Requires proper heat dissipation at higher loads
  • Use base resistor for safe operation

Package Includes:

  • 1 × BD139 Transistor

Disclaimer:
No warranty. No guarantee. No return. No replacement.

No review given yet!

Total price :
  (Tax : )

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