This post explains for the PNP transistor.
Part Number: A1837, 2SA1837
Function: – 230V, – 1A, PNP Transistor
Package: TO-220 type
Manufacturer: Toshiba
See the preview image and the PDF file for more information.
Image
Description
This is Silicon PNP Epitaxial Type Transistor.
Features
1. High transition frequency: fT= 70 MHz (typ.)
2. Complementary to 2SC4793
Maximum Ratings
1. Collector-base voltage : VCBO = – 230 V
2. Collector-emitter voltage : VCEO = – 230 V
3. Emitter-base voltage : VEBO = – 5 V
4. Collector current : IC = – 1 A
5. Base current : IB = – 0.1 A
6. Junction Temperature: Tj = 150°C
7. Storage Temperature: Tsg = -55 ~ +150°C
Applications
1. Power Amplifier
2. Driver Stage Amplifier
Other data sheets are available within the file: 2SA1837