This post explains for the semiconductor A1413, 2SA1413.
The function of this semiconductor is PNP Transistor.
The package is TO-251 Type.
Manufacturers : NEC
Preview images :
A1413 is designed for High Voltage Switching, especially in Hybrid Integrated Circuits.
Absolute maximum ratings ( Ta=25°C )
1. Collector to Base Voltage : Vcbo = – 600V
2. Collector to Emitter Voltage : Vceo = – 600 V
3. Emitter to Base Voltage : Vebo = – 7 V
4. Collector Current : Ic = – 1.0 A
5. Total Dissipation : Pt = 10 W
6. Junction Temperature : Tj = 150°C
7. Storage Temperatue : Tsg = -55 ~ +150°C