Residual current circuit breaker 25A, 30mA, 4-pole, type AC CDC425J

Residual Current Device – Protection and Safety of Installation

The Hager CDC425J residual current device is a four-pole device designed to protect electrical circuits against the effects of leakage currents and short circuits. Mounted on a DIN rail, it provides personal and fire protection by disconnecting the power supply when a dangerous differential current is detected. The device is indispensable in both home installations and public and industrial buildings.

Product features and application

The CDC425J circuit breaker is characterized by a rated current of 25A and a sensitivity of 30mA (AC type), which means it reacts to leakage currents of 30 milliamperes. The rated voltage of 400V and the high short-circuit breaking capacity (6kA) guarantee reliable operation in various conditions. The width of the device, 4 modules, makes it easy to install in standard distribution boards.

• Versatile application: ideal for protecting lighting circuits, socket outlets and electrical appliances.
• Protection against electric shock: effectively protects users from dangerous contact with live conductors.
• Fire protection: minimizes the risk of fire caused by damage to cable insulation.
• DIN rail mounting: ensures easy and quick installation in the distribution board.
• High reliability: confirmed by a reputable manufacturer – Hager.

Technical parameters and construction

The circuit breaker has been designed with durability and safety in mind. It has a degree of protection of IP20, which means protection against touching with a finger and solid objects larger than 12.5 mm. Made of high-quality materials, resistant to atmospheric and mechanical damage. The device has 4 poles, and its embedding depth is 70 mm. It is adapted for single-wire conductors with a cross-section of 1-25 mm² and multi-wire conductors with a cross-section of 1-16 mm². It can operate at a temperature of -25 to +40 °C. The rated voltage is 400V with a short-circuit breaking capacity (Icn) of 6kA.

Additionally, the circuit breaker has an optical trip indicator that informs about the cause of the power disconnection - whether due to differential current, short circuit or overload. This enables quick fault diagnosis and minimizes downtime of the electrical installation. The device meets the requirements of EN 61008-1 standard, which guarantees its safety and compliance with applicable regulations.