SIRIUS S00 direct starter — 0.25 kW at 400 V, Class 10
The 3RA2110-4AA18-1AP0 is a Siemens SIRIUS direct (on-line) starter in size S00, rated 0.25 kW at 400 V 50/60 Hz. It ships as a pre-assembled unit with a 3RT2018-1AP01 contactor and a 3RA1921-1DA00 link module, so the coordination between the contactor and overload is factory-set. The screw-type main circuit terminals accept the motor and line wiring directly.
Motor power coverage across common line voltages
The starter covers a range of motor ratings: 1 hp at 110/120 V, 3 hp at 200/208 V, 5 hp at 220/230 V, 10 hp at 460/480 V, and 2 hp at 230 V. At 600 V the full-load current limit is 11 A; at 480 V it is 14 A. This voltage flexibility makes it suitable for export panels or multi-voltage plant floors where the same BOM line must serve 208 V and 480 V feeds.
DIN rail mounting and clearance envelope
Mounts vertically on 35 mm DIN rail via the snap-on foot, with screw fastening as an alternative. Clearance requirements: 50 mm above, 20 mm below, 20 mm to the side, and 20 mm forward; no clearance needed behind the rail. These numbers matter when laying out a dense panel — the 45 mm width leaves room for adjacent breakers or contactors in the same row.