The breaking capacity at 240 V hits 121 kA, at 415 V it's 75.6 kA, at 440 V it's 52.5 kA, and at 690 V it drops to 11.9 kA — that's the sort of short-circuit headroom you need for high-fault panels where the upstream transformer can dump serious energy into a bolted fault.
Thermal derating and operating envelope
At 55 °C it drops to 19.2 A, at 60 °C to 18.8 A, at 65 °C to 18.4 A, and at 70 °C to 18 A. If your enclosure sits near a drive or transformer and ambient regularly hits 55 °C, plan for that 0.8 A reduction.
Physical fit in the panel
That 76.2 mm width is three 25.4 mm pole modules — standard for a 3-pole MCCB on a DIN rail or bolted to a backplate. No trip indicator on the front, so you'll need to verify status via the handle position or a remote auxiliary contact (not included on this variant).