This post explains for the 50V, NPN transistor.
The Part Number is 2SD1762.
The function of this semiconductor is 50V, 3A, NPN Transistor .
The package is TO-220FP Type
Manufacturer: Rohm
Preview images:
Description
D1762 is 50V, 3A, Silicon NPN Power Transistor.
Features:
1. Low VCE(sat), VCE(sat) = 0.5V (Typ.) (IC / IB = 2A / 0.2A)
2. Complements the 2SB1184 / 2SB1243 / 2SB1185.
3. Low collector saturation voltage
Applications:
1. For low frequency power amplifier applications