This post explains for the transistor.
The Part Number is BC147, BC148, BC149.
The function of this semiconductor is NPN Transistor.
Manufacturer: Siemens, ETC, Mullard
Image
Description
BC147 is 45V, 200mA, NPN Transistor.
Absolute maximum ratings ( Ta=25°C )
1. Collector to Base Voltage: Vcbo = 50 V
2. Collector to Emitter Voltage: Vceo = 45 V
3. Emitter to Base Voltage: Vebo = 6 V
4. Collector Current: Ic = 200 mA
5. Total Dissipation : Ptot = 300 mW
6. Junction Temperature: Tj = 125°C
7. Storage Temperature: Tsg = -55 ~ +125°C
BC147 PDF Datasheet
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