MJE13009 transistor is a semiconductor device made of silicon material. It is an NPN transistor that is mainly used for switching and amplification purposes. The power dissipation of this transistor is 100W and the emitter-base voltage is 9V which is the amount of voltage needed to bias the device.

MJE13009 Tranistor Pinout

The MJE13009 transistor carries three terminals known as:

  • Base
  • Collector
  • Emitter

All these three terminals are used for external connection with the electrical/electronics circuit. The given below figure shows the pinout diagram of MJE13009.


The pins carry different doping concentrations. The collector terminal is a lightly doped terminal while the emitter terminal is a highly doped terminal compared to other terminals. Similarly, the base pin is 10 times more doped than the collector pin.

Characteristics of MJE13009 Transistor

  • Package: TO-220
  • Type: NPN
  • Emitter-Base Voltage: 9 V
  • Collector-Emitter Voltage: 400 V
  • Collector-Base Voltage: 700 V
  • Collector Current: 12 A
  • Collector Dissipation: 100 W
  • DC Current Gain (here): 8 –40
  • Transition Frequency: 4 MHz
  • Operating and Storage Junction Temperature: -65 to +150 °C

MJE13009 Working Principle

The base terminal is responsible for the overall transistor action (active and deactivate). When voltage is applied at the base pin of the transistor, current will start flowing from the collector to the emitter terminal. biasing depends always on the base voltage in all transistors.

Replacement and Equivalent for MJE13009 transistor

You can replace the MJE13009 with the KSE13009, FJP13009, or MJE13009G.

MJE13009 Power Ratings

The absolute maximum ratings of MJE13009 are given in the table given below

Absolute Maximum Ratings of MJE13009
Pin No. Pin Description Pin Name
1 Collector-emitter voltage is 400V
2 Collector-base voltage is 700V
3 Base-emitter voltage is 9V
4 Collector current is 12A
5 Power dissipation is 100W
6 The Base current 6A
7 Operating and storage junction temperature range -55 to 150C

MJE13009 Applications

  • Used in voltage regulator circuits.
  • Employed in the switched-mode power supply.
  • Used in H-bridge circuits.
  • Employed in Bistable and Astable multivibrators circuit.
  • Used to support loads under 12A.
  • Installed in the motor control circuit.
  • Employed for switching and amplification purpose.
  • Used in modern electronic circuits.

MJE13009 Physical dimensions

Datasheet of MJE13009 Transistor

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