BC557 PNP Transistor - (Pack of 5)

The BC557 is a widely used general-purpose PNP bipolar junction transistor, ideal for low-power switching and signal amplification circuits. With a collector current rating of -100mA and a collector-emitter voltage of -45V, it serves as the PNP complement to the popular BC547 NPN transistor. This pack of 5 ensures you have spares on hand for prototyping, repairs, and project builds. Available from The Engineer Store, Bengaluru with fast shipping, 7-day warranty on manufacturing defects, and dedicated technical support.

Specifications

Why Choose the BC557 from The Engineer Store?

• Versatile PNP transistor: Handles switching and amplification tasks up to -100mA collector current and -45V V_CEO
• High current gain: h_FE range of 110-800 provides excellent sensitivity for low-signal applications
• Industry-standard TO-92 package: Breadboard and PCB friendly with easy-to-identify pinout (C-B-E)
• Complementary pair ready: Pairs perfectly with BC547 NPN for push-pull amplifier stages and complementary circuit designs
• Pack of 5 included: Enough transistors for multi-stage circuits, experimentation, and keeping spares
• 100% authentic components sourced directly from trusted and authorized distributors
• 1-5 day shipping, 7-8 day delivery from our Bengaluru warehouse to most locations across India
• Expert technical support available 24/7 to help with circuit design and troubleshooting

Project Ideas & Applications

• Switching Circuits: Use the BC557 to switch LEDs, relays, buzzers, and small loads from the high side - ideal when the load connects to ground and you need a PNP transistor to control power from the positive rail.
• Signal Amplification: Build common-emitter or common-collector amplifier stages for audio pre-amplifiers, sensor signal conditioning, and small-signal processing circuits.
• Complementary Push-Pull Amplifiers: Pair with the BC547 NPN transistor to create Class-B or Class-AB audio output stages that efficiently drive speakers and headphones.
• Current Source & Current Mirror: Design precision constant-current sources and current mirrors for biasing circuits, LED drivers, and analog instrumentation.
• Oscillator Circuits: Construct astable and monostable multivibrators, relaxation oscillators, and tone generators using BC557 pairs or mixed NPN/PNP configurations.
• Sensor Interface Circuits: Amplify signals from thermistors, LDRs, photodiodes, and other sensors to drive microcontroller ADC inputs or trigger actuators.
• Voltage Regulators: Use as a pass element in simple series voltage regulators or as a driver transistor in linear regulator designs.
• Arduino & Microcontroller Projects: Drive higher-current loads that GPIO pins cannot handle directly, such as motor drivers, relay modules, and LED arrays.
• Learning & Education: Perfect for electronics students studying BJT theory, biasing, load-line analysis, and transistor circuit design on breadboards.

How to Use the BC557 PNP Transistor

The BC557 has three pins in the TO-92 package: Collector (C), Base (B), and

Frequently Asked Questions

Buy BC557 PNP Transistor - (Pack of 5) Online in India

Purchase the BC557 PNP Transistor - (Pack of 5) online at The Engineer Store - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on BC557 PNP Transistor - (Pack of 5) with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.

Looking to buy BC557 PNP Transistor - (Pack of 5) at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.