Siemens 3VM1120-5GD42-0AA0 Smart Protection Industrial-grade MCCB

The primary function is to provide reliable protection for electrical circuits against overcurrents, specifically overloads and short circuits. It acts as an automatic safety device to interrupt electricity flow during faults, preventing equipment damage and fire hazards.

A breaking capacity of 55kA at 415V signifies the maximum fault current the circuit breaker can safely interrupt without sustaining damage. This rating ensures the device can handle severe short-circuit events, protecting downstream equipment and personnel from destructive electrical arcs.

No, the MCCB features fixed overload and fixed short-circuit settings (FTFM). The trip points are pre-set by the manufacturer and cannot be altered by the end-user, which simplifies installation by eliminating the need for calibration.

A 4-pole MCCB includes an additional pole for the neutral conductor. This ensures complete isolation of the circuit in the event of a fault, enhancing safety, especially in IT systems or when dealing with sensitive equipment requiring balanced power distribution.

It is best suited for line protection in industrial and commercial power distribution systems. It is ideal for safeguarding circuits in motor control centers, distribution boards, and protecting individual industrial machinery where dependable protection is a priority.