This is NPN Transistor.
Part Number: A42
Function: 300V, 0.5A, NPN Transistor
Package: TO-92 Type
Manufacturer: SECOS, CDIL
This is NPN Epitaxial Planar Silicon Transistor, High Voltage Transistor.
A42 transistor is an NPN BJT transistor designed for high voltage applications such as high voltage switching and high voltage amplifications.
Absolute maximum ratings ( Ta=25°C )
1. Collector to Base Voltage: Vcbo = 300 V
2. Collector to Emitter Voltage: Vceo = 300 V
3. Emitter to Base Voltage: Vebo = 6 V
4. Collector Current: Ic = 500 mA
5. Total Dissipation : Pc = 625 mW
6. Junction Temperature: Tj = 150°C
7. Storage Temperature: Tsg = -55 ~ +150°C
Other data sheets are available within the file: A42C, MPSA42, MPSA43