What the 16 A AC-3 rating means for fit
The 3RA2110-4AA18-1BB4: The 16 A at 400 V AC-3 rating is the motor-switching current for standard squirrel-cage motors — this direct starter handles a 7.5 kW motor at 400 V. Maximum operating voltage is 690 V for both AC-3 and AC-3e duty, so it works in 400 V and 480 V systems with headroom.
Mounting and panel integration
The supplied contactor is a 3RT2018-1BB41 and the link module is 3RA1921-1DA00, so the assembly comes as a tested unit. Clearance requirements: 50 mm upwards, 20 mm forwards, 10 mm downwards, 20 mm at the side, and 0 mm backwards. Operating temperature range is -20 to +60 °C; storage range is -50 to +80 °C.
