SIRIUS Size S2 power contactor — 30 kW at 500 V AC-3
The Siemens 3RT1036-1BE44 is a SIRIUS-brand power contactor in the Size S2 frame, rated for 30 kW at 500 V in AC-3 duty — the standard motor-switching category for squirrel-cage induction motors. That 30 kW figure at 500 V is the headline rating that governs motor sizing: it tells you the contactor can handle a 30 kW 500 V motor under normal starting and running conditions, with a maximum switching rate of 800 operations per hour in AC-3 use. For heavier-duty applications like slip-ring motors or plugging/inching duty, the AC-4 rating is 41 A at 400 V — a useful figure for drives that reverse or brake frequently, where the contactor breaks full-load current at each transition. The contactor also carries an AC-2 rating of 22 kW at 400 V, covering wound-rotor motor starting where the rotor circuit is switched.
Mounting and wiring — DIN rail, screw terminals, fill factor
Solid wire capacity: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded wire: 2x (0.75 to 25 mm²). Dimensions: 55 mm wide, 112 mm high, 179 mm deep.
Lifecycle and compliance — current production, RoHS dated
RoHS compliance is dated 05/01/2012, covering the EU RoHS substance prohibitions.