Rated operating current at AC-12 duty is 10 A, covering control-circuit loads like PLC outputs and relay coils. For motor switching, it handles 11 kW at 690 V (AC-3) and 7.5 kW at 400 V under AC-2 duty for slip-ring motors.
The AC-4 rating of 15.5 A at 400 V defines the contactor's capability for plugging, inching, or reversing duty — the most demanding thermal cycling. If your application involves frequent motor reversals or jogging, this is the figure that governs contact life, not the AC-3 rating. Type 1 coordination allows a 63 A gL/gG fuse but accepts contact welding. This distinction matters when specifying the branch circuit protection for your panel.
As a SIRIUS S0 frame contactor, it shares the same physical footprint and mounting pattern as other S0 devices in the series. If you're replacing a 3RT1017-1AP01 or similar, the 45 mm width and DIN rail clip are identical, though verify coil voltage and auxiliary configuration against your BOM.