Residual current device P 304 4P 40 A 100 mA type AC, DX3 series 411713

Safety and Reliability in Your Electrical Installation

This four-pole residual current device (RCD) from Legrand’s DX³ series, rated at 40A and with 100mA sensitivity (Type AC), is a critical component ensuring protection of people and equipment in electrical installations. Designed with both professional installers and end-users in mind, it delivers effective protection against electric shock and fires caused by ground faults.

Functionality and Application

The P 304 DX³ is intended for protecting circuits with a rated voltage of 400V. Its design complies with the IEC/EN 61008-1 standard, ensuring adherence to current safety regulations. The Type AC classification indicates that the device responds to sinusoidal alternating residual currents, making it an ideal solution for safeguarding standard circuits in residential and commercial buildings. Its 4-module width facilitates easy installation in electrical distribution boards.

Ease of Use and Installation

The device is mounted on a DIN rail, significantly speeding up the installation process. It supports cable cross-sections from 0.75 mm² to 50 mm² (single-core) and from 0.75 mm² to 35 mm² (multi-core), offering flexibility in conductor selection. Additionally, it features a mechanical lock to prevent accidental tripping. The test button allows for regular verification of device functionality—essential for maintaining continuous protection. The RCD can be expanded with additional DX³-series accessories such as auxiliary contacts or trip units, enabling customization to meet specific installation requirements. With a short-circuit withstand rating of 10 kA, it ensures reliable operation even under high fault current conditions.