MCB C120N-C100-4 C 100A 4-pole A9N18374

High-current circuit protection

This device is a key element in installations requiring protection against overloads and short circuits at rated currents reaching 100 A. Designed for DIN rail mounting, it offers four-pole protection (4P), allowing for the simultaneous disconnection of all conductors, including the neutral conductor. Thanks to its type C tripping characteristic, the device is particularly useful in circuits supplying motor-driven devices or other loads that generate short-term inrush current spikes, which could cause nuisance tripping in breakers with different characteristics.

High breaking capacity is one of the main advantages of this model. The circuit breaker guarantees safe disconnection of the circuit even at short-circuit currents up to 10 kA (according to EN 60898) and up to 20 kA in industrial conditions (IEC 60947-2 standard at 230 V). Energy limiting class 3 ensures rapid extinction of the electric arc, minimizing thermal and mechanical damage to the installation during a fault. The rated insulation voltage is 500 V, and the impulse withstand voltage reaches 6 kV, making it suitable for use in environments with an increased degree of pollution (degree 3) and overvoltage category IV.

Mounting flexibility and compatibility with distribution boards

The device's design is intended for convenient handling both during installation and subsequent operation. A width of 6 standard modules allows for efficient use of space in modular distribution boards, while a mounting depth of 44 mm facilitates installation in standard enclosures. The device accepts conductors with cross-sections from 1 to 50 mm² (single-core) and from 1 to 35 mm² (multi-core), providing great freedom in selecting cabling compliant with the electrical installation design.

The possibility of additional equipment opens the way to expanding the functionality of the protection system. Auxiliary modules, such as signal contacts or alarm relays, can be connected to the circuit breaker, allowing for remote monitoring of the circuit status or integration with building automation systems. The expected mechanical durability of 20,000 cycles and electrical durability (for the current range) ensure long and reliable operation even in conditions requiring frequent switching operations.

Operating conditions and environmental parameters

The device is adapted to work in a wide range of ambient temperatures, from -25 °C to +70 °C, making it a universal solution not only for industrial and office interiors but also for technical rooms with more difficult thermal conditions. The rated operating frequency includes standard power grids: 50 Hz and 60 Hz. The IP20 protection rating protects against contact with dangerous live parts via finger access, which is standard for devices mounted in closed modular distribution boards (where the assembly reaches IP40).

The selection of this model is based on specific technical parameters: the device supports a rated current of 100 A at a voltage of 400 V AC, has 4 poles protected, and features type C magnetic tripping (range 5–10 In). The breaking capacity Icn is 10 kA at the rated voltage according to the EN 60898-1 standard, and in industrial conditions (IEC 60947-2), it reaches 20 kA at 230 V AC. The design occupies a width of 6 DIN modules with a mounting depth of 44 mm, accepting single-core conductors with a cross-section of 1.5–50 mm² and multi-core 1–35 mm². Operation is possible in temperatures of -25 °C ... +70 °C, and the rated insulation voltage (Ui) is 500 V AC with an impulse withstand voltage (Uimp) of 6 kV.

By combining high short-circuit parameters with mounting flexibility and the possibility of expansion with auxiliary elements, this model proves effective as the main protection for medium-power distribution circuits in industrial installations and large commercial facilities.