Terminal Blocks

A terminal block is a type of insulated electrical connector used to securely connect two or more wires. They provide a safe and organised way to join wires in various circuits, making them essential in many electrical applications. Also known as terminal strips or connection blocks, they are widely used in industrial, commercial, and domestic settings.

Termination Types

Terminal blocks are often categorised by their termination type, which refers to the method used to connect the wires to the block. The choice of connection technology depends on factors like the application, environment, and the cable connector block requirements, such as conductor cross-section or AWG size. Our terminal blocks are available in several termination types, including:

Screw Clamp

Screw clamp terminals are the most common type. Wires are inserted into the block and pressed against a conductor strip. Tightening a screw then secures the connection.

Spring Clamp

Spring clamp terminals utilise a spring-operated mechanism to hold the wire in place. A screwdriver is used to open the clamp, allowing the wire to be inserted. Releasing the clamp securely grips the wire. These terminals are particularly well-suited for environments with high vibration.

Push-In Connection

Push-in connection technology allows for tool-free wire insertion. Simply push the conductor into the connection gap. These terminals accommodate both solid and stranded wires (with a ferrule). Their tool-free design ensures quick and easy installation.

Types of Terminal Blocks

RS supplies a wide range of high-performance terminal blocks to meet diverse needs. Our terminal connectors come in various types and connection methods. Some of the most popular include:

DIN Rail Terminal Blocks: Designed to snap onto standardised DIN rails, these terminal blocks are ideal for space-limited applications, offering single, dual, and triple-level configurations.
PCB Terminal Blocks: These terminal blocks mount directly onto printed circuit boards (PCBs), providing secure connection points for wires to interface with PCB circuitry.
Standard Terminal Blocks (Choc Block Strips): Commonly known as "choc block" strips, these compact blocks with screw clamp connections are widely used in low-voltage applications.
Distribution Blocks and Commoning Blocks: Distribution blocks split a single input into multiple outputs while commoning blocks connect multiple wires to a single point, commonly used in industrial control systems.
Fused Terminal Blocks: These blocks integrate a fuse holder for overcurrent protection, making them essential in applications where circuit protection is critical.
Barrier Strips: Barrier strips enhance safety by spacing terminals apart with insulating barriers, preventing accidental contact and electrical arcing, often used in high-voltage applications.

Terminal Block Applications

Terminal blocks are essential in various industrial applications where safe and reliable electrical connections are critical. Here are some common uses:

Industrial Automation: Terminal blocks are widely used in Programmable Logic Controllers (PLCs), control panels, and automation systems to connect sensors, actuators, and other devices, enabling efficient signal and power distribution.
Power Distribution: In power distribution systems, terminal blocks provide a safe and organised way to connect and distribute power to various equipment and circuits.
Building Automation: Terminal blocks play a key role in building automation systems, connecting various components like sensors, actuators, and controllers for HVAC, lighting, and security systems.
Instrumentation: In instrumentation and process control applications, terminal blocks provide reliable connection points for sensors, transmitters, and other devices, ensuring accurate data acquisition and control.
Transportation: Terminal blocks are used in various transportation applications, such as railway signalling, automotive wiring, and aerospace systems, to provide secure and reliable electrical connections in demanding environments.

How to Choose the Right Terminal Block

Choosing the right terminal block depends on several key factors. Consider the termination type (screw clamp, spring clamp, or push-in), the number of terminals, wire size, current and voltage ratings, and mounting style (DIN rail or panel mount). For specialised needs, explore options like fuse holders or pluggable connections using a terminal plug. At RS, a leading connector terminal supplier, we offer a wide range of high-quality terminal blocks to ensure safe and reliable connections for any application.

How to Order Terminal Blocks from RS Hong Kong?

Ordering terminal blocks from RS Hong Kong is easy. As a trusted supplier, we offer top-level terminal blocks from industry-leading brands like Weidmüller, Phoenix Contact, WAGO, ABB, and Entrelec. Browse our extensive catalogue to find the perfect one for your needs, whether a DIN rail terminal block for industrial automation or a PCB terminal block for electronics projects. Once identified, simply select the desired quantity and proceed to checkout for secure payment and prompt delivery.

How Delivery Works at RS Hong Kong

RS Hong Kong is dedicated to delivering your terminal blocks quickly and efficiently. We understand the importance of timely delivery for your projects and offer various delivery options to suit multiple budgets and schedules. Beyond terminal blocks, we also provide a wide selection of other electrical and electronic components, such as connectors and relays, to meet your diverse needs. For comprehensive information about our delivery services and available options, please visit our delivery information page.