This post explains for the transistor.
The Part Number is 3DD13007MD.
The function of this semiconductor is 400V, 8A,NPN POWER TRANSISTOR.
Manufacturer: JILIN SINO-MICROELECTRONICS
Preview images :
Description
The D13007MD is 400V, 8A, NPN Transistor.
Features
1. High breakdown voltage
2. High current capability
3. High switching speed
4. High reliability
5. RoHS product
Absolute maximum ratings ( Ta=25°C )
1. Collector to Base Voltage: Vcbo = 700 V
2. Collector to Emitter Voltage: Vceo = 400 V
3. Emitter to Base Voltage: Vebo = 9 V
4. Collector Current: Ic = 8 A
5. Collector Dissipation : Pc = 80 W
6. Junction Temperature: Tj = 150°C
7. Storage Temperature: Tsg = -55 ~ +150°C

Applications:
1. Energy-saving light
2. Electronic ballasts
3. High frequency switching power supply
4. High frequency power transform
5. Commonly power amplifier
