That kind of SCCR headroom is what keeps a mill's motor control centre from cascading failures on a bolted fault. The magnetic overcurrent release handles the short-circuit side; there's no phase-failure or ground-fault detection built in, so external monitoring is needed if those conditions matter for your process.
The 3RV1353-6AP10's interrupting rating varies with system voltage: 100 kA at 240 V AC, 85 kA at 400 V AC, 50 kA at 500 V AC, and 10 kA at 690 V AC. The 10 kA at 690 V is still adequate for many 690 V motor circuits, though a selectivity study should confirm coordination with the upstream device.
Screw fixing to the mounting plate — no DIN-rail clip on this one, so panel layout needs to account for drilled holes. Dimensions are 90 mm wide, 130 mm high, 70 mm deep, with zero clearance required at the back and sides, which simplifies enclosure sizing. The main circuit terminals are screw-type on the front side; auxiliary and control circuit terminals are also screw-type. An auxiliary switch can be added (product extension auxiliary switch: Yes), useful for remote status indication or interlocking.