Residual current device P 304 4P 100 A 100 mA Type A DX3 series 411773

Safety and Reliability in Your Electrical Installation

The residual current device (RCD) P 304 4P is a critical component for protecting electrical installations in both residential and industrial buildings. This device, rated at 100A and with 100mA sensitivity of Type A, safeguards users against electric shock and protects equipment from damage caused by short circuits and overloads. Its primary function is to rapidly disconnect the circuit upon detecting earth leakage current, minimizing risks to life and property.

Construction and Application

The P 304 4P switch from Legrand’s DX³ series is a four-pole device designed for DIN-rail mounting. With a width of 4 modules, it enables efficient use of space in distribution boards. The use of a Type A RCD ensures effective response to both alternating sinusoidal currents and pulsating direct currents—this is especially important for modern electronic devices. The mechanical lock provides additional safety by preventing accidental tripping or unintended re-energizing of the device.

Key Features and Benefits

• High short-circuit withstand capacity: A short-circuit rating of 10 kA ensures reliable operation even under high surge conditions.
• Wide operating temperature range: The device maintains performance across temperatures from -25°C to 60°C, making it suitable for diverse environmental conditions.
• Compatibility with HX³ system: Integration with the HX³ Energy Distribution Optimization System up to 125A simplifies connection to modern energy management systems.
• Expandability: Compatibility with DX³ series accessories—such as auxiliary contacts and trip units—allows customization of the device’s functionality to meet specific installation requirements.
• Wire cross-sections: Supports single-core cables from 0.75 mm² to 50 mm² and multi-core cables from 0.75 mm² to 35 mm², ensuring flexibility when connecting various cable types.
• Durability and quality: Manufactured from high-quality materials and compliant with EN 61008-1 standard, ensuring long-term, fault-free operation.
• Test button: Built-in test button enables regular verification of the RCD’s proper functioning—a simple yet essential step to maintain high safety standards.

The residual current device P 304 4P is an investment in safety and comfort for electrical installations—valued by professional installers and end-users alike who prioritize reliability and protection against electrical hazards.