RST

RST – Residual Current Circuit Breakers (RCCBs) and Residual Current Devices (RCDs) are essential protective components in any low-voltage electrical installation. These devices, commonly referred to as RSTs, RCCBs, or simply residual current breakers, are designed to detect leakage currents to earth and disconnect the circuit automatically, preventing electric shock and fire hazards. Available in 2-pole (2P) and 4-pole (4P) configurations, they are rated for currents from 25A up to 125A, with sensitivities of 30mA, 100mA, 300mA, and 500mA. They operate at standard voltages of 230V/400V AC, 50/60Hz, and are typically mounted on DIN rails within distribution boards. Key technical parameters include rated residual operating current (IΔn), rated voltage (Ue), and breaking capacity (Icn). These devices are crucial for ensuring safety in residential, commercial, and industrial environments.

RSTs are primarily installed in electrical distribution boards, control panels, and automation cabinets. They are widely used in residential buildings for protection of final circuits, in commercial facilities like offices and retail spaces, and in industrial settings for machinery and equipment protection. They are also essential in temporary power installations, construction sites, and agricultural applications where earth leakage protection is mandatory. Their role in preventing electrical fires and protecting personnel from indirect contact makes them a cornerstone of modern electrical safety standards.

Our catalog includes a comprehensive range of RSTs, including Type AC (for sinusoidal alternating residual currents), Type A (for pulsed DC residual currents), and Type S (selective/time-delayed) models. Key article codes follow a structured naming convention, such as RST-2P-40A-30mA for a 2-pole, 40A, 30mA device, or RST-4P-63A-300mA for a 4-pole, 63A, 300mA unit. We also offer RSTs with integrated overcurrent protection (RCBOs) and models with auxiliary contacts for remote signaling. All products comply with international standards like IEC 61008 and IEC 61009.

At Electric Automation Network, we provide the best prices with up to 65% discount, fast express worldwide shipping, and personalized technical support from our team of specialized engineers. Each product includes detailed technical documentation, real-time pricing, and expert advice to ensure you select the right RST for your application. Whether you need a standard 30mA device for home protection or a selective 300mA unit for industrial use, we have the solution.