Circuit breaker Hager NCN320 — 3-pole, Type C, 20 A, 10 kA, 3-modular

Hager NCN320 is a 3-pole miniature circuit breaker with a C characteristic, rated for 20 A and a short-circuit breaking capacity of 10 kA. Intended for DIN-rail mounting as a 3-modular device, this MCB delivers overcurrent protection for three-phase circuits in residential and light commercial distribution boards. The device is designed to handle moderate inrush currents, making it suitable for protecting circuits that supply motors, lighting and other inductive or resistive loads.

Advantages

The NCN320 offers coordinated overcurrent protection across three poles with a Type C tripping curve, providing reliable performance for circuits with moderate surge currents. Its 10 kA breaking capacity ensures a defined level of fault interruption for typical household and small commercial installations. The compact 3-modular design allows space-efficient installation on standard DIN rails, while the standardized form factor simplifies replacement and integration into distribution boards.

Suitable for

Key specifications

How to use

Install the NCN320 on a standard 35 mm DIN rail in the distribution board following applicable electrical codes and safety procedures. Ensure correct orientation and secure mechanical connection. Connect line and load conductors to the corresponding terminals and torque terminal screws to the manufacturer's recommended values. Verify that the device rating (20 A, Type C) matches the circuit requirements and that coordination with upstream and downstream protective devices is maintained. After wiring, perform insulation and continuity tests before energizing the circuit.

Recommendations

Use the NCN320 where a compact, three-pole MCB with moderate inrush tolerance is required. Confirm coordination with other protective devices and avoid subjecting the breaker to currents above its rated breaking capacity. For installations with higher prospective fault currents or unusual load profiles, select protective devices with appropriate characteristics and consult relevant standards or a qualified electrician.