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BC547 NPN General Purpose Transistor (TO-92 / DIP Package)
The BC547 NPN General Purpose Bipolar Junction Transistor (BJT) in a standard TO-92 through-hole (DIP compatible) package is an industry-essential component for low-power amplification and high-speed signal switching. Designed with a collector-emitter voltage (V_CEO) of 45V and a maximum continuous collector current (I_C) of 100mA, the BC547 features a high DC current gain (h_FE) ranging from 110 to 800. It is ideal for driving small relays, LEDs, buzzers, and signal amplification in Arduino, microcontrollers, sensor modules, audio preamplifiers, and complementary push-pull circuits when paired with the BC557 PNP transistor.
₹ 2
₹ 10
This transistor is designed to handle small currents efficiently and is ideal for signal control and switching applications.
Key Features
- NPN general-purpose transistor
- Suitable for switching and signal amplification
- High current gain (hFE)
- Low noise operation
- Easy to use in breadboard and PCB circuits
- Compatible with Arduino and microcontroller systems
- Low cost and widely available
- Reliable performance for low-power applications
Technical Specifications
| Parameter | Specification |
|---|---|
| Transistor Type | NPN |
| Model | BC547 |
| Package Type | TO-92 (DIP-style) |
| Collector Current (Ic) | Up to 100 mA |
| Collector-Emitter Voltage | 45V (max) |
| Power Dissipation | ~500 mW |
| DC Current Gain (hFE) | 110 – 800 (typical range) |
| Operating Mode | Switching / Amplification |
| Frequency Range | Low to medium frequency applications |
How to Use
- Identify pins: Collector, Base, Emitter
- Connect emitter to ground (common in NPN circuits)
- Use base resistor to control input current
- Connect load to collector side
- Apply small input signal to base to switch device
- Test in switching or amplification circuits
Applications
- Relay driver circuits
- LED switching systems
- Sensor signal amplification
- Arduino and embedded projects
- Audio pre-amplifier stages
- Logic switching circuits
- DIY electronics and prototyping
Package Includes
1 * BC547 Transistor NPN – General Purpose Low-Power Amplifier & Switch
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