Residual current circuit breaker, 4P, B, 40A, 30mA, short-delay F204 B-40/0.03 2CSF204568R1400

Residual Current Circuit Breaker – Reliable Installation Protection

This four-pole Type B residual current circuit breaker, with a rated current of 40A and a tripping current of 30mA, is a key element ensuring safety in electrical installations. Designed to protect people and equipment from the effects of short circuits to earth and leakage currents, it performs well in residential, commercial, and industrial buildings. Its Type B technology detects not only alternating currents but also pulsating and direct currents, making it an ideal solution for modern installations with receivers generating such disturbances – such as photovoltaic inverters, electric vehicle chargers, or switch-mode power supplies.

Functionality and technical parameters

The circuit breaker is characterized by high resistance to interference and surge voltages up to 3kA, which guarantees its reliable operation in difficult conditions. Mounting is on a DIN rail, and the compact dimensions (70 x 85 x 69 mm) make installation easy even in limited spaces. The cross-section of the connected solid wire is from 1 to 25 mm², which ensures compatibility with different types of wires. Power losses are 6.96W, which translates to efficient energy use. The IP20 degree of protection provides protection against contact with foreign solid objects with a diameter greater than 12.5mm.

• Type B: Provides protection against AC, pulsating DC and smooth DC currents – ideal for applications with inverters and EV chargers.

• Rated current 40A: Suitable for most standard circuits in residential and commercial buildings.

• Sensitivity 30mA: Fast detection of leakage currents, minimizing the risk of electric shock.

• Short-circuit breaking capacity 3kA: Guarantees effective disconnection of the circuit in the event of a short circuit.

• DIN rail mounting: Standard mounting for easy integration with existing electrical infrastructure.

• Width 4 modules: Compact dimensions save space in the switchgear cabinet.

Application and benefits for professionals

This residual current circuit breaker is particularly recommended for applications requiring high resistance to interference and protection against direct currents – i.e. everywhere where modern electronic devices generating such disturbances are used. Thanks to this, it is a reliable solution for installers working on photovoltaic projects, electric vehicle chargers or uninterruptible power supply (UPS) systems. Its high quality of workmanship and compliance with safety standards guarantee long-lasting and trouble-free operation, minimizing the risk of complaints and ensuring customer satisfaction. Additionally, a wide range of operating temperatures (-25°C to +65°C) allows its use in various environmental conditions.