Residual current circuit breaker 40A, 30mA, 2-pole, type AC CDC240J

Safety and protection in your electrical installation

This Hager CDC240J two-pole residual current circuit breaker (RCCB) is a key element ensuring safety in every electrical circuit. Its function is to quickly disconnect the power supply in the event of a ground fault current, minimizing the risk of electric shock and equipment damage. With a sensitivity of 30mA, it provides effective protection against dangerous leakage currents, and the AC characteristic makes it ideal for protecting circuits with devices generating alternating currents.

Functionality and installation

The circuit breaker is designed for mounting on a DIN rail, which facilitates its installation and replacement in the distribution board. Compact dimensions – a width of 2 modules – allow for efficient use of space in the switchgear cabinet. Adapted to work with wires with a cross-section from 1 to 25 mm², it offers flexibility in connecting different types of installations. Rated voltage of 230V and rated current of 40A make it a suitable choice for most standard household and industrial circuits. Additionally, it has a lock that prevents accidental switching on after being switched off due to a leakage current.

Construction features and parameters

The CDC240J circuit breaker is characterized by high reliability and durability confirmed by a number of technical parameters. Short-circuit strength at the level of 6kA guarantees its resistance to sudden current surges, and high quality of workmanship ensures long-term trouble-free operation. An optical status indicator allows for quick identification of any problems with the operation of the circuit breaker – both in the event of tripping due to a leakage current and a normal circuit disconnection. Compliance with safety standards (including the rated impulse withstand voltage Uimp at 4kV) ensures operation in accordance with applicable regulations. Additionally, power losses of 6.24W minimize the impact on the energy efficiency of the installation.