BC557 PNP General Purpose Transistor
₹99.00
- Full Name: BC557 PNP General Purpose Transistor
- General-purpose PNP transistor
- High DC current gain
- Low power consumption
- Fast switching performance
- Suitable for switching and amplification
- Compact TO-92 package
- Reliable and durable construction
- Easy to interface with analog and digital circuits
- Complementary transistor to BC547
Specifications
The BC557 is a PNP Bipolar Junction Transistor (BJT) designed for low-power switching and signal amplification applications. It is widely used in Arduino projects, relay drivers, LED switching, sensor circuits, audio amplifiers, oscillator circuits, and DIY electronics. As the complementary transistor to the BC547, the BC557 is commonly used in push-pull amplifier circuits and low-current switching applications.
Features
- Full Name: BC557 PNP General Purpose Transistor
- General-purpose PNP transistor
- High DC current gain
- Low power consumption
- Fast switching performance
- Suitable for switching and amplification
- Compact TO-92 package
- Reliable and durable construction
- Easy to interface with analog and digital circuits
- Complementary transistor to BC547
Specifications
| Specification | Value |
|---|---|
| Product Type | PNP Bipolar Junction Transistor (BJT) |
| Model | BC557 |
| Package | TO-92 |
| Collector-Emitter Voltage (VCEO) | -45V |
| Collector-Base Voltage (VCBO) | -50V |
| Emitter-Base Voltage (VEBO) | -5V |
| Maximum Collector Current (IC) | -100mA |
| Maximum Power Dissipation | 500mW |
| DC Current Gain (hFE) | 110–800 (A/B/C gain groups) |
| Transition Frequency (fT) | Approx. 150 MHz |
| Operating Temperature | -55°C to +150°C |
Pin Configuration
When viewed from the flat side with the leads pointing downward:
| Pin | Function |
|---|---|
| 1 | Collector (C) |
| 2 | Base (B) |
| 3 | Emitter (E) |
Note: Pin configuration may vary slightly between manufacturers. Always verify the datasheet of your specific BC557 before use.
Applications / Uses
- Relay driver circuits
- LED switching
- Audio amplifier circuits
- Signal amplification
- Sensor interface circuits
- Oscillator circuits
- Arduino and ESP32 projects
- Push-pull amplifier stages
- Educational electronics
- DIY electronics projects
Advantages
- High current gain
- Fast switching response
- Low power consumption
- Compact TO-92 package
- Reliable operation
- Cost-effective
- Widely available
- Easy to use
Size
| Specification | Value |
|---|---|
| Package Type | TO-92 |
| Body Width | Approx. 4.5 mm |
| Body Height | Approx. 5 mm |
| Overall Height (with leads) | Approx. 14 mm |
| Lead Pitch | 1.27 mm |
| Weight | Approx. 0.3 g |
Package Includes
- 1 × BC557 PNP General Purpose Transistor (TO-92)
Note: The BC557 is commonly paired with the BC547 in complementary amplifier and switching circuits. It is designed for low-current applications with a maximum collector current of 100mA. Always use a base resistor when connecting the transistor to a microcontroller or logic circuit, and use a flyback diode when switching inductive loads such as relays or small motors.
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