C2120 PDF – 30V, 0.8A, NPN Transistor – 2SC2120

Part Number: C2120

Function: 30V, 0.8A, NPN Transistor

Package: TO-92 Type


Images:C2120 pdf pinout


C2120 is 30V, 0.8A, NPN Transistor. A NPN transistor is a type of bipolar junction transistor (BJT) that consists of two n-type semiconductor materials separated by a single p-type material.

The NPN transistor is used to amplify or switch electronic signals and is widely used in many electronic circuits. It works by controlling the current flow between the collector and emitter terminals through the base terminal.

When a small current is applied to the base, it controls a much larger current between the collector and emitter, making the NPN transistor an effective amplifier or switch.

1. Current Amplification: NPN transistors are designed to amplify electrical current, and can be used in a wide range of electronic applications such as amplifiers, switches, and oscillators.

2. Forward Biased: In order to operate, the base-emitter junction of an NPN transistor must be forward biased, meaning that the base must be connected to a positive voltage relative to the emitter.

3. High Input Impedance: NPN transistors have a high input impedance, which means that they are less likely to draw current from the input source, and are therefore less likely to cause a drop in voltage across the source.


1. High DC Current Gain

2. Complementary to 2SA950


C2120 datasheet transistor

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage : Vcbo = 35 V

2. Collector to Emitter Voltage : Vceo = 30 V

3. Emitter to Base Voltage : Vebo = 5 V

4. Collector Current : Ic = 0.8 A

5. Total Dissipation : Pc = 600 mW

6. Junction Temperature : Tj = 150°C

7. Storage Temperatue : Tsg = -55 ~ +150°C

C2120 PDF Datasheet