Breaking capacity and derating
At 415 V the breaker still interrupts 121 kA; at 440 V it drops to 75.6 kA, and at 500 V or 690 V it holds at 17 kA. That steep curve means the 187 kA headline is real only on 240 V line-to-line or 120/240 V split-phase services — above 480 V the rating is a fraction of the peak. Thermal derating is mild: 80 A from 40 °C through 50 °C, then 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C.
Physical fit and auxiliaries
The case is 130 mm tall, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that drops onto a DIN rail or mounts directly to a backplate.