The adjustable thermal-magnetic trip covers 189 A minimum to 945 A maximum, which sets the short-circuit and overload pickup — this is the figure you set during commissioning to match the motor FLA and cable ampacity, not the 63 A frame rating.
Interrupting capacity — the voltage-dependent curve
Breaking capacity follows the voltage: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. That 3.7 kA at 690 V is the weak point — if your panel feeds a 690 V motor branch with a prospective fault current above 3.7 kA, this breaker will not hold. At the common 400/415 V distribution level, 242 kA covers nearly any industrial installation. The SCCR is the number the panel builder stamps on the nameplate; this breaker lets you claim high fault ratings at 240–500 V without a current-limiting fuse upstream.
Auxiliary and alarm switch complement
That is four discrete signals from one breaker — enough for a motor control center (MCC) bucket without adding external relay logic.
That 86 mm depth is the projection from the mounting surface — important when fitting into a shallow MCC bucket or a wall-mount enclosure with a door-mounted operator.