Breaking capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — enough to clear a hard fault on a 440 V bus without upstream coordination headaches.
The 63 A rating holds from 40 °C up to 50 °C without derating; at 55 °C it drops to 62 A, and at 70 °C it's 58 A. It trips on thermal overload and magnetic short-circuit; if you need adjustable long-time or short-time pickup, you'd step up to an electronic-trip variant. Those are add-on accessories if the spec requires shunt trip or GF protection.
Where it goes in the panel
Footprint is 76.2 mm wide, 130 mm tall, 70 mm deep — a standard 3-pole MCCB form factor that fits most DIN-rail or panel-mount enclosures without re-drilling.