Transistor BC109 NPN 20V / 0.2A

Transistor BC109 NPN 20V / 0.2A

Product information:

The BC109 transistor is known for its reliability and versatility in various electronic circuits. As an NPN type transistor, the BC109 offers a maximum current of 200 mA and a maximum voltage of 20 V, making it suitable for a wide range of applications.

With its low collector-emitter voltage (VCE) and high current gain (hFE), the BC109 is ideal for use in signal amplifier circuits, switching circuits and frequency generators. The compact TO-18 package makes it easy to integrate this transistor into various electronic designs.

What does an NPN transistor do?

An NPN transistor is a type of bipolar transistor that uses current or voltage to control the flow of current through a circuit. The key feature of an NPN transistor is that current flows from the collector to the emitter when a small current is applied to the base.

What an NPN transistor does:

Switching: When a positive voltage is applied to the base relative to the emitter (more positive than the emitter), the transistor turns 'on', allowing current to flow from the collector to the emitter. This is used in circuits to switch power.

Amplification: A small input current (from the base to the emitter) causes a much larger current to flow through the collector. This makes the NPN transistor useful as an amplifier for electrical signals.

In an NPN transistor, the collector is the positive side, the emitter is the negative side, and the base is the switch that enables current flow between the collector and emitter.

In summary: An NPN transistor allows current to flow from the collector to the emitter when a positive voltage is applied to the base.