Interrupting capacity is the headline number here: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. At 690 V the rating drops to 3.7 kA, which is still adequate for most 690 V motor control centers but not for high-fault 690 V utility tie points. The breaker's power loss is 10 W maximum — negligible for panel thermal budgeting but worth noting if you're packing multiple breakers in a sealed enclosure.
Sizing and thermal performance
That means no derating curve to calculate for elevated ambient temperatures — the breaker delivers its full rating in a hot panel or near a motor drive.