MCB C120N-C80-4 C 80A 4-pole A9N18372

Professional protection for electrical installations

The C120N-C80-4 circuit breaker is an advanced protective device from the Acti9 family, designed for demanding applications in AC installations. The four-pole design (4P) with a rated current of 80A and C tripping characteristic provides comprehensive circuit protection against the effects of overloads and short circuits.

The device utilizes thermomagnetic technology, which effectively responds to various types of electrical faults. The thermal element protects against long-term overloads, while the magnetic component instantaneously interrupts the circuit in the event of short circuits. The C characteristic signifies an upper magnetic tripping limit in the range of 5...10 × In, making it an ideal solution for circuits supplying devices with significant inrush currents.

Applications and compatibility

Model A9N18372 is suitable for a wide spectrum of applications - from residential distribution boards through commercial installations to medium-power industrial systems. It is particularly recommended for protecting three-phase circuits with a neutral conductor and applications requiring the simultaneous disconnection of all poles.

Mounting on a standard 35mm DIN rail enables quick installation in any modular distribution board. The device is compatible with "comb" type distribution blocks (comb busbar), allowing for fast and flexible creation of multi-pole configurations without the need for individual wiring of each device.

Construction and operational advantages

The circuit breaker features a robust construction meeting the requirements of EN/IEC 60898-1 and EN/IEC 60947-2 standards. The white housing provides an IP20 degree of protection, protecting against contact with live parts and against the ingress of solid objects larger than 12mm.

The device offers an isolation function confirmed by the EAC certificate, enabling safe operation as a main isolator in power distribution systems. The contact position indicator and local on/off signaling provide full control over the device status.

Tunnel terminals support single-core wires with a cross-section of 1.5...50mm² and multi-core wires of 1...35mm², with a stripped length of 15mm. The tightening torque is 3.5 N·m, guaranteeing secure electrical connections.

Operating parameters and safety

The rated breaking capacity according to the EN/IEC 60898-1 standard is 10kA for voltages AC230...400V at mains frequencies of 50/60Hz. In accordance with IEC 60947-2, the device achieves a breaking capacity of up to 20kA at AC220...240V and maintains parameters at 10kA for AC380...415V voltages.

An energy limiting class of 3 according to EN/IEC 60947-2 ensures effective limitation of short-circuit energy, protecting the installation from thermal and dynamic damage. An insulation voltage of [Ui] = 500V AC and an impulse withstand voltage of [Uimp] = 6kV guarantee safe operation even in difficult environmental conditions.

An operating temperature range of -25°C...70°C, relative humidity up to 95% at +55°C, and the possibility of mounting at altitudes up to 2000m a.s.l. allow the device to be used in practically any climatic conditions of European applications.

Power losses of only 3.2W minimize energy consumption during normal operation of the device.