Residual current device P 304 4P 25 A 500 mA Type A, TX3 series 411794

The residual current device P 304 4P 25 A 500 mA Type A, TX3 series, is a critical component ensuring safety in electrical installations. It protects users and equipment against electric shock and the consequences of short circuits, acting as a fire-prevention safeguard. This is a four-pole device designed for operation at AC 400 V voltage and a rated current of 25 A.

Functionality and Application

This residual current device features Type A sensitivity, meaning it effectively detects both alternating and direct leakage currents—particularly important in installations powering modern electronic devices. The rated residual current of 500 mA makes it suitable for applications requiring higher tolerance to leakage currents, such as installations with connected RTV/AGD appliances. Mounting is performed on a DIN rail, simplifying and accelerating installation.

The device’s design prioritizes ease of mounting and wire connection—lower terminal entry and shielded terminals significantly facilitate these tasks. Additionally, the presence of a test button enables regular verification of proper operation. The device includes a mechanical lock that prevents accidental switching on or off.

Technical Parameters and Design Features

The P 304 TX³ device stands out with a high rated short-circuit capacity of 10 kA (IEC/EN 61008-1), ensuring reliable performance even under high surge conditions. The IP20 protection rating guards against finger contact and ingress of solid objects larger than 12.5 mm. The device width is 4 modules, enabling efficient space utilization in distribution boards. The cross-section of connected single-core conductors ranges from 0.75 to 50 mm², and for multi-core conductors from 0.75 to 35 mm², offering great flexibility in cable selection. Constructed from high-temperature-resistant materials, the operating temperature range is -25°C to +60°C. The RAL 7035 finish ensures an aesthetic appearance and seamless integration with other electrical components.

An additional advantage is compatibility with various auxiliary devices—auxiliary contacts, signaling contacts, undervoltage and overvoltage release units, and remote actuators—enabling expansion of the protection system’s functionality.