Residual current device P 304 4P 25 A 30 mA Type A DX3 series 411759

Protection and Safety in Your Electrical Installation

This four-pole residual current device (RCD) from the DX3 series is a critical component ensuring safety in every electrical circuit. Designed to protect people and equipment against electric shock and the consequences of short circuits, it provides reliable protection in homes, commercial buildings, and industrial facilities. Its primary function is to rapidly disconnect the power supply upon detection of earth leakage current, minimizing the risk of hazard.

Functionality and Application

The P 304 breaker, rated at 25A and with 30mA sensitivity (Type A), effectively responds to both sinusoidal alternating and pulsating direct residual currents. This makes it ideal for installations with electronic loads that generate such disturbances. The wide range of conductor cross-sections supported (0.75 mm² to 50 mm² for single-core and 0.75 mm² to 35 mm² for multi-core) ensures compatibility with various cabling types. DIN rail mounting (TH35) simplifies installation and seamless integration with existing distribution equipment.

Construction and Key Features

This breaker features a robust construction and high manufacturing quality, guaranteeing long-term, fault-free operation. It occupies 4 module widths, enabling efficient use of space in the distribution board. It includes a mechanical lock to prevent accidental re-energization after tripping due to a fault. The rated impulse voltage withstand level of 4 kV and high short-circuit breaking capacity (10 kA) ensure resilience against voltage surges and short circuits. Additionally, the option to equip it with auxiliary contacts, trip units, and drives from the DX³ series expands its functionality and allows customization to meet specific installation requirements. The IP20 protection rating safeguards against finger contact and ingress of solid objects larger than 12.5 mm.