Rated breaking capacity hits 100 kA at 400 V AC (and at 240 V, 500 V AC), so it clears high-fault currents without upstream fuses in most industrial panels — that 100 kA figure is the same across multiple voltage levels, not a one-point rating.
That's the kind of rating that lets you simplify the protection scheme and reduce panel space. The 15 operations per hour maximum at AC-3 duty is the mechanical switching limit — fine for motor starting cycles, not for continuous high-speed jogging. Terminals accept 2x (1 to 2.5 mm²) or 2x (2.5 to 10 mm²) solid or stranded — M4 screws on the main contacts. No ground-fault or phase-failure detection built in; that's handled upstream or in the motor starter itself.