Bipolar Transistors

A bipolar transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. Available in NPN and PNP configurations, bipolar transistors are a fundamental component in analogue and digital circuit design.

RS Hong Kong stocks a wide range of bipolar transistors, including NPN, PNP, and specialist variants, with fast delivery across Hong Kong.

Types of Bipolar Transistors

RS Hong Kong's bipolar transistor range covers NPN, PNP, Darlington, digital, UJT, and power variants to suit a range of circuit designs.

NPN Transistors

NPN transistors are the most commonly used bipolar transistor type, conducting current when a positive voltage is applied to the base relative to the emitter.

PNP Transistors

PNP transistors conduct current when a negative voltage is applied to the base relative to the emitter, often used alongside NPN types in complementary circuit designs.

Darlington Transistors

Darlington transistors combine two transistors in a single package to achieve significantly higher current gain than a single transistor alone, suited to applications requiring high amplification from a small input signal.

Digital Transistors

Digital transistors integrate built-in bias resistors within the package, simplifying circuit design and reducing component count for switching applications.

UJT Transistors

Unijunction transistors (UJTs) are used primarily in switching and timing circuits, offering a distinct negative resistance characteristic suited to oscillator and trigger applications.

Power/High-Voltage Bipolar Transistors

Power and high-voltage bipolar transistors are designed to handle greater current and voltage loads, suited to applications such as motor control and power supply circuits.

Industrial Applications of Bipolar Transistors

Bipolar transistors are used across a wide range of electronic design and industrial applications.

Power Amplification

Bipolar transistors are widely used in power amplification circuits, boosting weak signals for use in audio equipment and communication systems.

Switching Circuits

Transistors are used as electronic switches in digital circuits, controlling the flow of current in response to input signals.

Signal Processing

Bipolar transistors form the building blocks of many signal processing circuits, used to amplify, filter, or condition electronic signals.

Motor Control

Power transistors are used in motor control circuits to regulate the current and voltage supplied to electric motors.

Shop Bipolar Transistors at RS Hong Kong

RS Hong Kong is a trusted supplier and distributor of bipolar transistors, stocking NPN, PNP, and specialist variants to suit a range of circuit designs. Complement your order with related products like Darlington Pairs and MOSFET transistors for complete circuit design coverage.

Delivery is free for business account holders and for orders over $250 for all other customers. Same working day delivery is available for HK-stocked items ordered before noon, Monday to Friday. Visit our delivery page for full terms.