C4977 PDF – 400V, 7A, NPN, 2SC4977, Transistor

Part Number: C4977, 2SC4977

Function: 400V, 7A, NPN Transistor

Package: TO-220F Type

Manufacturer: INCHANGE Semiconductor

Images:C4977 pdf pinout


C4977 is 400V, 7A, Silicon NPN Power 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. Collector-Emitter Sustaining Voltage: VCEO(SUS)= 400V(Min)

2. Fast Switching Speed

3. Collector-Emitter Saturation Voltage: VCE(sat)= 0.8V(Max.)@ IC= 4.0A


C4977 datasheet transistor

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = 450 V

2. Collector to Emitter Voltage: Vceo = 400 V

3. Emitter to Base Voltage: Vebo = 8 V

4. Collector Current: Ic = 7 A

5. Collector Dissipation : Pc = 40 W

6. Junction Temperature: Tj = 150°C

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


Designed for use in high-voltage, high-speed , power switching in inductive circuit , they are particularly suited for 115 and 220V switchmode applications such as switching regulator’s, inverters, DC-DC converter.


C4977 PDF Datasheet