Residual current device P 304 4P 100 A 500 mA Type A DX3 series 411793

Safety and Reliability in Your Electrical Installation

This four-pole residual current device (RCD) from the DX3 series, rated at 100 A and with a sensitivity of 500 mA (Type A), is a critical component ensuring protection of people and equipment in electrical installations. Designed by Legrand, it meets the highest safety standards and provides a reliable solution for both professional installers and end users. Constructed from high-quality materials, it guarantees long-term, fault-free operation.

Functionality and Installation

The device is designed for DIN rail mounting (standard TH35) and occupies 4 module widths. Its compact dimensions (mounting depth of 44 mm) facilitate installation even in confined spaces. The cross-section for single-core connected cables ranges from 0.75 to 50 mm², and for multi-core cables from 0.75 to 35 mm², ensuring compatibility with various cable types. It features a lock to prevent accidental tripping.

Characteristics and Applications

The Type A RCD detects both sinusoidal alternating residual currents and pulsating direct residual currents, making it an ideal solution for protection against electric shock and prevention of fires caused by earth faults. The rated insulation voltage (Ui) is 500 V, and the rated impulse withstand voltage (Uimp) is 4 kV, ensuring high resistance to overvoltages. The short-circuit withstand capacity (Icw) is 10 kA, and the impulse current withstand is 0.25 kA — critical parameters for ensuring safety during faults. The device operates at a frequency of 50 Hz and a rated voltage of 400 V AC. Additionally, it is compatible with the HX³ Optimal Power Distribution System up to 125 A, enabling wireless connection to electrical installations. The option to add accessories (auxiliary contacts, trip units) enhances its functionality and adaptability to individual installation requirements.