Residual current circuit breaker 3P+N 40A 300mA 6kA Type A S CPA440J

Safety and reliability in your installation

The Hager CPA440J 3P+N residual current circuit breaker is a key element ensuring the protection of people and equipment in electrical installations. The device effectively reacts to leakage currents, minimizing the risk of electric shock and preventing equipment damage. A rated current of 40A and a sensitivity of 300mA make it an ideal solution for both home and commercial installations.

Construction and installation

The circuit breaker is designed for mounting on a DIN rail, which greatly simplifies and speeds up installation. Compact dimensions – occupying 4 modules – allow for saving space in the distribution box. The solid construction guarantees long-lasting and trouble-free operation even in difficult conditions. The cross-section of the connected solid wire is 1-25 mm², and stranded wire 1-16 mm², ensuring compatibility with various types of cables.

Protection and technical parameters

The CPA440J circuit breaker is characterized by high resistance to shock current (5 kA) and short-circuit breaking capacity up to 6 kA. The rated insulation voltage Ui is 500 V, and the rated impulse voltage Uimp is 4 kV, providing additional safety in the event of overvoltage. The device operates at a frequency of 50 Hz and has a protection degree of IP20, protecting against accidental contact. Characteristic A S (time-delayed) provides resistance to short-term surge currents, reducing the risk of unnecessary tripping when starting devices with motors or other inductive loads. Additionally, selective protection allows for precise localization of faults in the installation.

• Thanks to the rated current of 40A, the circuit breaker effectively protects circuits against overloads and short circuits.
• Sensitivity to differential current of 300mA provides protection against electric shock, especially important in places with increased risk.
• Short-circuit breaking capacity of 6kA guarantees quick disconnection of the circuit in the event of a short circuit, minimizing potential equipment damage.
• Mounting on a standard DIN rail is simple and quick, which facilitates both installation and subsequent maintenance of the device.
• Compact width of only 4 modules allows you to save valuable space in the electrical distribution board.
• The ability to operate in a wide temperature range from -25°C to +40°C makes the circuit breaker suitable for use in various environmental conditions.
• The construction of the circuit breaker meets applicable safety standards, guaranteeing compliance with regulations and ensuring safe operation of the device.