BD140 Transistor Pinout, Equivalent, Features & Applications

BD140 transistor pinout

BD140 is a very famous PNP transistor uses in various electronics circuits. BD140 transistor can handle current upto 1500mA or 1.5A due to this feature. It can control high power LEDs, motors, relays etc because it can control loads upto 1.5A. This Transistor has many other ideal features like high collector emitter and collector base voltage that is 80 volts. Moreover, the collector dissipation of BD140 is around 12.5 watt that is way it is a good transistor to use in audio amplifier circuits. Minimum saturation voltage of the transistor is -0.5V.

BD140 Pinout:

Configurations of Pinout of this transistor are as follows.

BD140 transistor pinout

Features of BD140:

  • Transistor Type: PNP
  • Package Type: TO-126
  • Collector Current(IC): -1.5A
  • Collector-Emitter Voltage (VCE): –80V
  • Collector-Base Voltage (VCB): –80V
  • Emitter-Base Voltage (VEBO): –5V
  • Collector Dissipation (Pc): 12.5 Watt
  • Transition Frequency (ft): 190 MHz
  • DC Current Gain (hFE): 25 – 250
  • Max Storage and Operating temperature range is: -55 – +150 C

Classification of hFE

Transistor BD140 might have a current gain between 40 and 250. Current gain range of BD140-10 will be in the range from 63 to 160, BD140-6 ranges is between 40 to  and, BD140-16 current gain range is 100 to 250.

Replacement and Equivalent of BD140:

You can replace the BD140 with BD140G, BD170,BD180,BD231, BD790,BD792,BD238G, BD792, MJE171, MJE702

NPN Complement:

NPN Complementary of BD140 is BD139

SMD Equivalent:

The SMD version of transistor BD140 is available as the BCP53.

Applications of BD140:

  • Used in Audio Amplifiers
  • Switching Loads Circuits under 1.5A
  • Battery Chargers Circuits
  • Different types of Power Supplies
  • Motor Driver appliances
  • Darlington Pair Circuits

Precaution for Long Life BD140:

For the safety of the transistor you must operate it under its ratings and must operate this transistor under 80V DC. Always use a suitable heatsink and a suitable base resistor to provide required base current. Storage temperature should not below -55 centigrade and above +150 centigrade.

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