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Screw clamp
Screw clamps, also known as terminal blocks with screw-type connections or screw connectors, are fundamental components in electrical and industrial automation systems. These devices provide a secure and reliable method for connecting and terminating wires, typically rated for currents from a few amps up to several hundred amps, depending on the...
Screw clamps, also known as terminal blocks with screw-type connections or screw connectors, are fundamental components in electrical and industrial automation systems. These devices provide a secure and reliable method for connecting and terminating wires, typically rated for currents from a few amps up to several hundred amps, depending on the model. They feature a clamping mechanism that uses a screw to press a conductor against a current-carrying bar, ensuring low contact resistance and high mechanical stability. Common technical specifications include rated voltage (e.g., 400V, 690V, 1000V), rated cross-section (e.g., 0.5 mm² to 240 mm²), and number of poles (e.g., 1P, 2P, 3P, 4P). They are available in various mounting styles such as DIN rail mount, panel mount, or PCB mount, and often include accessories like end covers, marking tags, and partition plates for organized wiring.
Screw clamps are widely used in electrical distribution panels, control cabinets, motor control centers, and automation systems across industries like manufacturing, energy, transportation, and building infrastructure. They are essential for connecting power supplies, motors, sensors, actuators, and other field devices in both AC and DC circuits. Their robust design makes them suitable for harsh environments, including those with vibration or high temperature, and they are commonly found in switchgear, PLC cabinets, and junction boxes.
Key subcategories within screw clamps include feed-through terminal blocks, ground terminal blocks, fuse terminal blocks, and disconnect terminal blocks. For example, feed-through blocks are used for simple wire-to-wire connections, while ground blocks provide a safe path for fault currents. Common article codes often follow patterns like "UK" series (e.g., UK 2.5, UK 5, UK 10) or "ST" series (e.g., ST 2.5, ST 4, ST 6), where the number indicates the rated cross-section in mm². Other popular series include "W" series (e.g., W 2.5, W 4) and "M" series (e.g., M 2.5, M 4). These codes typically combine letters for the series and numbers for the size or current rating.
At Electric Automation Network, we offer a comprehensive range of screw clamps from leading manufacturers, with real-time pricing and detailed technical documentation for each article. Our engineering team provides personalized support to help you select the right components for your application. We ensure express worldwide shipping, so you receive your products quickly, minimizing downtime and keeping your projects on schedule.
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