Residual current device PR 304 4P 40 A 300 mA Type A DX3 series 410528

Safety and Protection in Your Electrical Installation

This four-pole residual current device (RCD) from Legrand’s DX3 series is a critical component ensuring safety in every electrical circuit. Designed to protect against electric shock and fire hazards caused by earth fault currents, it provides a reliable barrier for you and your equipment. Its Type A sensitivity ensures effective detection of both alternating sinusoidal currents and pulsating direct currents, significantly expanding the range of protection.

Functionality and Technical Specifications

The PR 304 4P breaker, rated at 40A with a rated residual current setting of 0.3A, performs excellently in installations with a nominal voltage range of 250 to 440V and a frequency of 50Hz. The integrated lockout feature prevents accidental tripping, which is especially important in public areas or locations requiring uninterrupted power supply. The design is compatible with DIN rail mounting (TH35), simplifying installation and integration into existing systems.

• Width: 4 modules (71.2 mm) – compact dimensions allow efficient use of space in the distribution board.
• Cross-section: Supports single-core cables from 1.5 to 35 mm² and multi-core cables from 1.5 to 25 mm², offering flexibility in cable selection.
• Operating temperature: Wide ambient temperature range (-25°C to 70°C) enables operation in harsh environmental conditions.
• Impulse withstand: Rated impulse voltage withstand (Uimp) of up to 4 kV ensures resistance to voltage surges.
• Protection rating: IP20 – protection against finger contact and solid objects larger than 12.5 mm.

Installation and Applications

This breaker is ideal for lighting circuits, power outlets, and any application requiring protection against electric shock. The option to add accessories (auxiliary contacts, trip units) allows customization of functionality to meet specific installation needs. Its robust construction and high manufacturing quality guarantee long-term, fault-free operation. Installation is achieved by snapping onto a DIN rail—quick and intuitive for any electrician.