This post explains for the transistor.
The Part Number is D1071, 2SD1071.
The function of this semiconductor is NPN Transistor.
The package is TO-220AB Type
Manufacturer: Fuji Semiconductor ( www.fujisemiconductor.com )
Preview images :
Description
D1071 is 450V, 6A, NPN Transistor.
Features
1. High D.C current gain
2. Low saturation voltage
3. High reliability
[…]
Absolute maximum ratings ( Ta=25°C )
1. Collector to Base Voltage: Vcbo = 450 V
2. Collector to Emitter Voltage: Vceo = 450 V
3. Emitter to Base Voltage: Vebo = 6 V
4. Collector Current: Ic = 6 A
5. Collector Dissipation : Pc = 40 W
6. Junction Temperature: Tj = 150°C
7. Storage Temperature: Tsg = -40 ~ +150°C
Applications:
1. Audio power amplifiers
2. Relay & solenoid drivers
3. Motor controls
4. General purpose power amplifiers
5. Including zener diode
D1071 PDF Datasheet
