Residual current device P 304 4P 25 A 300 mA type AC, DX3 series 411722

Installation Protection and User Safety

The residual current device (RCD) P 304 4P 25 A 300 mA type AC from the DX3 series is a critical component ensuring safety in every electrical installation. Its primary function is to protect users from electric shock and provide protection against the consequences of earth faults, significantly reducing fire risk. Thanks to its AC sensitivity, this device effectively detects leakage currents, ensuring rapid response and circuit disconnection in case of hazard.

This RCD is particularly suitable for installations requiring high reliability and effective protection, such as residential, commercial, and industrial buildings. Its four-pole design enables comprehensive circuit protection, while the rated current of 25 A makes it appropriate for a wide range of common applications. DIN rail mounting simplifies installation and seamless integration into existing protection systems.

Design Features and Operating Parameters

The P 304 DX3 RCD stands out for its robust construction and high manufacturing quality. The rated insulation voltage Ui is 500 V, and the rated impulse withstand voltage Uimp is 4 kV, guaranteeing resistance to overvoltages and disturbances. With a short-circuit withstand capacity of 10 kA, it provides reliable protection in the event of a short circuit. Additionally, the built-in lockout mechanism prevents accidental re-activation after tripping due to residual current.

The device operates reliably across a wide temperature range of -25°C to 60°C, enabling use in diverse environmental conditions. It supports connection of single-core cables from 0.75 mm² to 50 mm² and multi-core cables from 0.75 mm² to 35 mm², offering installation flexibility. Its compact size—4 module widths—allows efficient use of space in distribution boards. The integrated test button enables regular verification of the device’s functionality.