That designation matters: unlike a general-purpose motor-protective breaker, this part is coordinated to handle the inrush and sustained overload profile of a transformer primary, not a motor start.
DIN-rail footprint and clearance — panel integration
The body is 97 mm deep, 45 mm wide, 106 mm tall. Mounting position is any.
Breaking capacity across voltage — selectivity planning
The gL/gG fuse back-up ratings are voltage-dependent: 50 A at 400 V, 40 A at 500 V, 35 A at 690 V. The breaker's own breaking capacity also drops as voltage rises: 100 kA at 240 V and 400 V, 42 kA at 500 V, 4 kA at 690 V. For a 690 V transformer primary, the 4 kA figure governs — upstream coordination must account for that. The 15 operations per hour at AC-3 and AC-3e is the switching duty limit; this is not a frequent-switching device.