Its rated continuous current Iu is 63 A, and it carries that rating from 40 °C up to 50 °C without derating; at 55 °C it holds 60.48 A, and at 70 °C it still delivers 56.7 A — useful when the breaker is packed into a warm panel next to contactors and drives. The headline breaking capacity is 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V. It ships with an ETU310M electronic trip unit (the overcurrent release design), which provides adjustable thermal-magnetic or electronic protection curves depending on the trip unit variant. The auxiliary contact version is 3 auxiliary switches HQ — these are high-qualified contacts for signaling the breaker state back to a PLC or safety relay.
The width is the critical fill-factor number for a multi-breaker lineup on a DIN-rail or panel-mount backplate — 105 mm per pole set means three of these occupy 315 mm of rail width. Maximum power loss is 75 W, so plan for heat dissipation if the breaker is in a sealed sub-panel. The latching endurance is 20 000 operations, which is typical for a motor-protection MCCB subject to occasional switching rather than daily cycling.