D5703 Transistor – 800V, 10A, NPN, Equivalent, KSD5703 ( PDF )

Part Number: D5703, KSD5703

Function: 800V, 10A, Silicon NPN Transistor

Package: TO-3PF Type

Manufacturer: Fairchild Semiconductor

Images:D5703 pdf pinout


D5703 is 800V, 10A, NPN Triple Diffused Planar Silicon 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.

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 Collector-Base Voltage : VCBO=1500V

2. High Switching Speed tF = 0.3µs (Max.)

3. For Color TV


Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = 1500 V

2. Collector to Emitter Voltage: Vceo = 800 V

3. Emitter to Base Voltage: Vebo = 6 V

4. Collector Current: Ic = 10 A

5. Collector Dissipation : Pc = 70 W

6. Junction Temperature: Tj = 150°C

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

D5703 datasheet


1. High Voltage Color Display Horizontal Deflection Output (No Damper Diode)


D5703 PDF Datasheet