BC547 is a NPN transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at ground and will be closed (Forward biased) when a signal is provided to base pin.
BC547 Transistor Pinout Configuration
| Pin Number | Pin Name | Description |
| 1 | Collector | Current flows in through collector |
| 2 | Base | Controls the biasing of transistor |
| 3 | Emitter | Current Drains out through emitter |
BC547 Transistor Features
Note: Complete Technical Details can be found at the BC547 datasheet given at the download menu of this page.