BD140 Transistor Pinout, Equivalent

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

BD140 Pinout:

Configurations of the Pinout of this transistor are as follows.

BD140 Transistor Pinout, Equivalent, Features & Applications

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. The current gain range of BD140-10 will be in the range from 63 to 160, BD140-6 ranges are between 40 to and, 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 transistor under 80V DC. Always use a suitable heatsink and a suitable base resistor to provide the required base current. Storage temperature should not below -55 centigrade and above +150 centigrade.

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