Residual current device P 304 4P 40 A 500 mA Type A series TX3 411795

Protection and Safety in Electrical Installations

The residual current device P 304 4P 40A 500mA Type A from the TX³ series is a critical component ensuring safety in every electrical installation. The device effectively protects users and connected equipment against electric shock and the consequences of short circuits, providing reliable fire protection. Its primary function is to rapidly disconnect the circuit upon detection of earth leakage current, minimizing the risk of hazard.

Construction and Application

Designed for DIN rail mounting, the device simplifies installation and seamless integration into existing electrical infrastructure. The four-pole construction makes it ideal for protecting multi-phase circuits. With a rated current of 40A and a sensitivity to residual current of 500mA, it is suitable for use in residential, commercial, and public utility buildings. Equipped with a test button, it enables regular verification of functionality—essential for maintaining full protective effectiveness.

Advantages and Key Features

• High Reliability: Compliance with EN 61008-1 standard guarantees high quality and safe operation.
• Versatility: Type A provides protection against both sinusoidal alternating and pulsating direct residual currents—ideal for safeguarding electronic devices.
• Easy Installation: Bottom clip and shielded terminals facilitate and accelerate wire connection.
• Compatibility: Can be used with auxiliary devices from the DX³ series, such as auxiliary contacts or trip units, expanding the device’s functionality.
• Durability: Short-circuit withstand rating of 10kA ensures resistance to damage during fault conditions.
• Safety: Features a lockout mechanism preventing accidental re-energizing after tripping due to residual current operation.
• Wide Operating Temperature Range: Operates reliably in harsh environments from -25°C to +60°C.
• Robust Construction: Housing with a width of 4 modules (72mm), made from high-quality materials, ensures durability and mechanical resistance. RAL 7035 color provides an aesthetic appearance and easy identification within the installation.

Additional Information: The device features a rated insulation voltage Ui of 500V and an impulse withstand voltage Uimp of 4kV, providing additional protection against voltage surges. The connected conductor cross-section for single-core wires ranges from 0.75 mm² to 50 mm², and for multi-core wires from 0.75 mm² to 35 mm², offering flexibility in cable selection.