Panel fit and mounting — S00 form factor
The 3RA2115-4AA18-1BB4 is a size S00 direct starter, 45 mm wide by 167.2 mm tall by 97.1 mm deep — it occupies one standard 45 mm DIN-rail slot with snap-on mounting, or can be screw-mounted using the push-in lug. Mounting position is vertical only; the specified clearance above the unit is 20 mm, with 10 mm below and 9 mm at the side. No forward or backward clearance is needed, so the unit can sit flush against a panel backplane.
Motor starting duty — AC-3 ratings and trip class
At 400 V the power rating is 7.5 kW. The supplied contactor is a 3RT2018-1BB41, and the link module is 3RA1921-1DA00 — these are the matched components that make up the assembled starter, so the coordination between contactor and overload is factory-set.
Wiring and termination
The coil is rated 24 V, 50/60 Hz, matching standard control voltages in industrial panels.