What this MCCB delivers
It carries 100 A continuous current (Iu) across the full ambient range from 40 °C to 70 °C with no derating — that is a flat thermal curve, so the same 100 A holds even in a hot enclosure. Interrupting capacity is the headline here: 242 kA at 240 V AC, 187 kA at 415 V and 440 V, 121 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 motor-control center applications at that voltage.
Physical footprint: 105 mm wide, 181 mm tall, 86 mm deep. The ETU320 release is field-configurable for overload pickup (Ir) and short-time pickup (Isd).