The Siemens 3RA2220-1KB24-0AP6 is a SIRIUS non-fused reversing motor starter in size S0, combining a reversing contactor pair and a circuit-breaker (size S00) in one unit that snaps onto 35 mm standard rail. It ships with a 3RT2024-1AP60 contactor and a 3RA2921-1AA00 link module already integrated — order the reversing starter as a single line item, not three separate components.
Rated 5.5 kW at 400 V AC (11 A at 480 V, 11 A at 600 V) in AC-3 duty — this is the motor-switching current that governs real-world sizing, not the thermal current. Maximum operating voltage is 690 V, with AC-3 rated maximum also at 690 V. Horsepower ratings span from 0.5 hp at 110/120 V up to 10 hp at 575/600 V, giving a clean match for North American motor tables across common supply voltages. Coil operates on 176–242 V at 50 Hz and 192–264 V at 60 Hz.
Snap-on fastening on 35 mm standard rail, mounted vertically. Dimensions are 265 mm high × 90 mm wide × 120 mm deep — size S0 footprint that fits standard panel layouts. Required clearances around the unit: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the side, and 0 mm backwards — the back can sit flush against the panel backplane.
Operating temperature range is -20 to +60 °C; storage from -50 to +80 °C; transport from -55 to +80 °C — suitable for unheated warehouses and truck shipments across climate zones.