This MCCB delivers 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. Those numbers tell you where it can sit in a fault-current hierarchy — at 240 V it handles very high available fault current, so it's a candidate for main or tie breakers in low-voltage switchgear. At 690 V the 17 kA rating is more typical for downstream feeders; plan your coordination study accordingly.
The 50 A rating holds flat from 40 °C to 50 °C, then derates to 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. Maximum power loss is 14.6 W — useful for enclosure heat calculations.