Circuit breaker Icu=50kA 4P C 16A HMX416

4‑pole overload circuit breaker with C characteristic and 50 kA rating

Protects industrial and secondary circuits against overload and short circuit — especially where high inrush currents occur, e.g., in motors, pumps or compressors. The C characteristic enables it to withstand short current spikes during the start‑up of mechanical couplings without false tripping, while still quickly disconnecting the circuit under sustained overload or short circuit.

Mounted on a DIN rail, it occupies 6 modules. It is intended for surface mounting and requires no additional guards — its IP20 protection rating provides basic protection against contact with live parts, but it is not suitable for outdoor or humid environments.

Accepts single‑core conductors with cross‑section from 1 mm² to 70 mm² and multi‑core conductors from 1 mm² to 50 mm² — the same applies to both top and bottom terminals, facilitating installation in switchgear with many inputs and outputs. The terminal tightening torque is 3.6 Nm — a torque‑limiting screwdriver is sufficient to avoid damaging the contacts.

A short‑circuit rating of 50 kA at 230 V and 400 V means the breaker is ready for the most extreme fault conditions in TN-S or TN-C-S systems — without risk of enclosure rupture or explosion. Energy‑limiting class 3 reduces the amount of energy flowing through the installation during a fault, decreasing the risk of damage to the downstream load.

Operates in temperatures from –25 °C to +70 °C — suitable for both unheated technical rooms and hot machine spaces. Insulation voltage is 500 V and impulse voltage 6 kV, ensuring safety even during short‑duration lightning‑induced surges.

It does not disconnect the neutral — thus there is no risk of losing neutral protection in the event of a fault. All four poles are protected simultaneously. Optional accessories (e.g., residual‑current modules or auxiliary contacts) allow system expansion without replacing the breaker itself.

Dimensions: 90 mm height, 106 mm width, 70 mm depth — fits standard Hager‑type enclosures or other DIN‑compliant cabinets.