Residual current circuit breaker with overcurrent protection 4P 6kA B 40A/30mA Type A ADM440C

Residual Current Circuit Breaker with Overcurrent protection is a compact and reliable protection for electrical installations, combining the functions of an overcurrent and residual current circuit breaker. This model, with characteristic B and rated current of 40A, provides effective protection against overloads, short circuits and electric shock. It is an ideal solution for both new installations and modernization of existing ones.

Protection and functionality

The design of this circuit breaker is based on the principle of type A protection, which means it reacts to leakage currents of both alternating and direct current. The rated short-circuit breaking capacity of 6kA guarantees safety in the event of serious failures. Characteristic B ensures a quick response to short-term overloads, typical of devices with induction motors or transformers. Additionally, a mechanical lock prevents accidental disconnection of the circuit breaker on the supply side during maintenance work.

Installation and application

The circuit breaker, 4 modules wide, is designed for mounting on TH35 rail in electrical distribution boards. The possibility of flush mounting increases installation flexibility. Wire cross-sections from 1 mm² to 16 mm² (stranded) and 1 mm² to 25 mm² (solid) allow connection of a wide range of wires. Designed to operate at temperatures from -25°C to 40°C and rated voltage of 400V, it will perform well in various environmental conditions. Application in AC (alternating current) circuits makes it a universal solution for homes, apartments, commercial buildings and industrial facilities. IP20 protection degree provides basic protection against accidental contact.

Key features:

• Combined function: Overcurrent and residual current circuit breaker in one device – saving space and costs.
• High breaking capacity: 6kA ensures safety even with high short-circuit currents.
• Characteristic B: Quick response to short-term overloads, ideal for devices with motors.
• Type A protection: Reacts to AC and DC leakage currents – increased user safety.
• Mechanical lock: Prevents accidental disconnection during maintenance.
• Flush mounting: Installation flexibility and aesthetic appearance.