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BC327 BC327-25 PNP Transistor 45V 0.5A - Overview
The BC327 (or BC327-25) is a high-performance PNP transistor with a maximum voltage rating of 45V and a maximum current rating of 0.5A. This transistor is widely used in switching and amplification applications in low-power circuits. It can be used to switch on/off small loads and amplify signals in a variety of electronic designs.
Pinout
Below is the pinout diagram for the BC327 transistor:

Wiring Instructions
The BC327 PNP transistor can be used in a variety of circuits for switching and amplification. Here’s how to wire the BC327 in a simple switching circuit:
- Collector (Pin 3): Connect to the load (e.g., an LED or motor) and then to the positive supply voltage (Vcc).
- Base (Pin 1): Connect to a current-limiting resistor and then to the control signal (e.g., from an Arduino or microcontroller).
- Emitter (Pin 2): Connect to ground (GND).
Sample Code
Here’s a simple code to control the BC327 transistor using an Arduino. The transistor will switch an LED on and off based on the digital output from the Arduino:
int transistorPin = 3; // Pin connected to the base of the BC327 void setup() { pinMode(transistorPin, OUTPUT); // Set the transistor pin as an output } void loop() { digitalWrite(transistorPin, HIGH); // Turn the transistor ON (LED ON) delay(1000); // Wait for 1 second digitalWrite(transistorPin, LOW); // Turn the transistor OFF (LED OFF) delay(1000); // Wait for 1 second }
Applications
The BC327 is ideal for:
- Switching small loads (e.g., relays, LEDs, motors)
- Signal amplification in audio and RF circuits
- Pulse-width modulation (PWM) control circuits
- Linear amplification in small signal circuits
Key Features
- PNP transistor
- Maximum collector-emitter voltage (Vce): 45V
- Maximum collector current (Ic): 0.5A
- High current gain
- Low power consumption