Breaking capacity is the headline number: 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. It includes ground-fault monitoring via summation current formation on the L + N conductor, so it catches leakage on the load side without a separate GFCI module. That's one less device to wire and one less DIN rail slot consumed.
Dimensions: 181 mm height, 140 mm width, 86 mm depth. That 86 mm depth keeps it clear of most gland plates and back-panel wiring channels — no need to force a deeper enclosure just to clear the breaker body.