C5478 PDF Datasheet – 900V, 50mA, NPN Transistor – Sanyo

This post explains for the Transistor.

The Part Number is C5478, 2SC5478.

The function of this semiconductor is 900V, 50mA, NPN Transistor.

The package is TO-220AB type

Manufacturer: Sanyo Semicon Device

Preview images :

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C5478 transistor


This is 900V, 50mA, NPN Triple Diffused Planar Silicon Transistor.

C5478 Transistor is a type of bipolar junction transistor (BJT) made from silicon, a semiconductor material. This transistor is designed for amplifying or switching electronic signals in various electronic circuits.

NPN Configuration:

1. Emitter (N): The heavily doped N-type layer, which is the source of charge carriers (electrons) in the transistor.

2. Base (P): The thin P-type layer, which controls the flow of charge carriers between the emitter and collector.

3. Collector (N): The N-type layer, which collects the charge carriers that pass through the base-emitter junction.


1. High breakdown voltage

2. Small Cob

3. Wide ASO

4. High reliability ( Adoption of HVP process )

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C5478 datasheet

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = 1700 V

2. Collector to Emitter Voltage: Vceo = 900 V

3. Emitter to Base Voltage: Vebo = 5 V

4. Collector Current: Ic = 50 mA

5. Collector Dissipation : Pc = 1.75 W

6. Junction Temperature: Tj = 150°C

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

C5478 PDF Datasheet