Description
The BC547 NPN Transistor is a general-purpose silicon transistor commonly used in electronic circuits for signal amplification and switching. The BC547B variant is suitable for low-power applications such as LED drivers, relay driver circuits, audio signal amplification, and sensor interfaces.
Its compact TO-92 package makes it easy to integrate into breadboards, prototyping circuits, and printed circuit boards. The BC547B operates as an NPN transistor, using a small base current to control a larger current flowing between the collector and emitter.
This transistor can be used in common-emitter, common-collector, and common-base amplifier configurations. It is also commonly used in switching circuits where a microcontroller or control signal needs to operate a suitable low-current load.
Key Features
- BC547B NPN bipolar junction transistor
- Compact TO-92 through-hole package
- Maximum collector current of 100mA
- Collector-emitter voltage rating of 45V
- Suitable for low-power switching and amplification
- Complementary transistor: BC557 PNP
- Useful for LED drivers, relay driver circuits, and signal processing
- Suitable for educational, DIY, and general electronics projects
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | BC547B |
| Transistor Type | NPN bipolar junction transistor |
| Package | TO-92 |
| Collector-Base Voltage (VCBO) | 50V |
| Collector-Emitter Voltage (VCEO) | 45V |
| Emitter-Base Voltage (VEBO) | 6V |
| Maximum Collector Current (IC) | 100mA |
| Power Dissipation (PD) | 625mW, as listed |
| Maximum Junction Temperature (TJ) | 150°C |
| Maximum Base Current | 5mA, as listed |
| Complementary Transistor | BC557 PNP |
| Main Applications | Switching and signal amplification |
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