Residual current circuit breaker rx3 4p 40a 30mA type A 402075

Modern shock protection in three-phase systems

The RX3 Type A residual current circuit breaker is an advanced protective device designed for professionals and end-users seeking reliable protection against electric shock and fires resulting from electrical installation faults.

Construction and System Compatibility

The four-pole construction (L1+L2+L3+N) makes the device ideal for three-phase installations with a rated voltage of 400V AC and a rated current of 40A. Mounting on a standard DIN EN 60715 rail enables quick installation in domestic, office, and industrial distribution boards.

The device width is exactly 4 modules (71.2 mm), allowing optimal space utilization in the electrical distribution board. The mounting depth is only 44 mm, while the total device depth is a compact 78.85 mm with a height of 88.9 mm.

Advanced Detection and Safety Features

Type A is characterized by the ability to detect both alternating leakage currents (AC) and pulsating DC components. This is a key advantage over basic AC-type circuit breakers - particularly important in modern installations with consumer electronics generating DC components.

The residual current sensitivity of the standard 30 mA ensures optimal shock protection for people while maintaining adequate immunity to natural leakage currents occurring in properly functioning installations.

The short-circuit withstand capacity of 10 kA guarantees safe operation even in the event of serious installation faults.

Operational and Environmental Parameters

The device maintains full functionality over a wide ambient temperature range from -25°C to +60°C during operation and can be stored at temperatures from -40°C to +70°C without loss of technical parameters.

The IP20 protection rating ensures safe installation inside electrical distribution boards, protecting against contact with live parts and against access to solid objects larger than Ø12 mm.

The halogen-free construction eliminates the emission of toxic gases in the event of a device fire - particularly important for evacuation safety in public utility buildings.

Normative Compliance and Certification

The product meets the requirements of the international standard IEC/EN 61008-1 for residual current operated circuit-breakers without integral overcurrent protection, as well as the German VDE0664-10 regulating requirements for Fehlerstromschutzschalter.

The rated insulation voltage Ui of 500 V and the rated impulse voltage Uimp of 4 kV ensure high resistance to atmospheric and switching overvoltages occurring in the power network.

The impulse current withstand capacity of up to 0.25 kA protects internal components from damage caused by sudden current surges characteristic of electric motor starting or reactive power compensation.

Connection System and Operation

The flexible connection system supports single-core conductors with a cross-section from 0.75 mm² to a maximum of 50 mm², while multi-core conductors can have a cross-section from 0.75 mm² to 35 mm². This universality enables adaptation to various types of electrical installations.

The built-in locking mechanism physically prevents unauthorized switching-on of the device during service or maintenance work on the electrical distribution board.

The device can be powered from either the top or the bottom according to the electrical distribution board configuration needs - this flexibility simplifies the design of electrical power distribution systems.

Marking of all connection terminals facilitates correct identification during installation and servicing by technical personnel holding SEP qualifications for the operation of electrical equipment.