This post explains for the transistor.
The Part Number is C6144, 2SC6144.
The function of this semiconductor is 50V, 10A, NPN transistor.
Manufacturer: Sanyo Semicon Device
Preview images :
Description
C6144 is 50V, 10A, NPN Epitaxial Planar Silicon Transistor. 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.
Characteristics:
Pinouts:
Absolute maximum ratings ( Ta=25°C )
1. Collector to Base Voltage: Vcbo = 60 V
2. Collector to Emitter Voltage: Vceo = 50 V
3. Emitter to Base Voltage: Vebo = 5 V
4. Collector Current: Ic = 10 A
5. Collector Dissipation : Pc =2 W
6. Junction Temperature: Tj = 150°C
7. Storage Temperature: Tsg = -55 ~ +150°C