MJE13005 NPN Transistor : Pin Configuration & Its Working

The MJE13005 is a high-speed, high-power NPN transistor that is used for amplification and switching.
This component is composed of three layers, one of which is p-doped and the other two of which are n-doped. Between these two n-doped layers is the p-doped layer.

The MJE13005 is a silicon-based semiconductor device. It is a current-controlled device with three terminals known as emitter, base, and collector, as opposed to MOSFETs, which are voltage-controlled devices with three terminals known as source, drain, and gate.
All of these terminals have varying levels of doping. In comparison to the other two terminals, the collector pin has a low doping concentration and the emitter pin has a high doping concentration. The collector pin is ten times more doped than the base pin. Furthermore, because the emitter current is the sum of the collector and base currents, the emitter side carries the entire current of the device.
Bipolar junction transistors are divided into two types: NPN transistors and PNP transistors.
In both of these transistors, electrons, and holes play critical roles in conductivity. However, in NPN transistors, holes are the majority carriers, whereas, in PNP transistors, holes are the minority carriers.
NPN transistors are preferred over PNP transistors for a variety of applications because electron mobility is greater than hole mobility.
• Because they sink ground to the output, NPN devices are sometimes referred to as “sinking devices.” PNP devices are sometimes referred to as “sourcing devices” because they supply positive power to the output.
This device’s DC gain ranges from 8 to 40, indicating the amount of current it can amplify.

Pin Configurations

The pin diagram of the MJE13005 NPN Transistor is shown below.

Base – Controls the biasing of the transistor; used to turn the transistor ON or OFF.
Collector – Current enters the collector, which is normally connected to the load.
Emitter – Current drains through the emitter, which is normally connected to ground.

They are particularly suited for 115 and 220V switch mode applications such as switching regulators, inverters, DC-DC converters, motor controls, solenoid/relay drivers, and deflection circuits.
Uninterruptible Power Supply.
Circuits such as power supplies and battery chargers.
In current electronic circuits.
Used in Astable & Bistable Multivibrators.
Used in the SMPS.