Dimensions are 97 mm deep, 45 mm wide, 97 mm tall — a compact 45 mm footprint that fits standard 45 mm-wide DIN slots, leaving room for adjacent devices.
The fuse backup ratings are 50 A gL/gG at 400 V, 40 A at 500 V, and 35 A at 690 V — these are the maximum fuse sizes that still allow the breaker to clear a fault without exceeding its withstand. Breaking capacity drops with voltage: 100 kA at 400 V, 42 kA at 500 V, 4 kA at 690 V — the 690 V rating is low, so verify the available fault current at that voltage level.