The Siemens 3RT1015-1MB42-0KT0 is a SIRIUS power contactor in the compact Size S00 frame, switching motor loads up to 3 kW in AC-2 duty at 400 V or 6.5 A in AC-4 duty at 400 V. The magnet coil is rated 24 VDC with a holding power of 1.4 W — a fixed DC coil that pulls in and seals at the same power, so there is no AC inrush to budget for on the 24 V supply. Screw-type terminals on the main circuit accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or up to 2x (0.75 to 4 mm²) — solid or stranded — and the AWG equivalents run 2x (20 to 16), 2x (18 to 14), or 1x 12. The 45 mm width, 57.5 mm height, and 72 mm depth fit the standard Size S00 footprint — a direct swap into any panel laid out for this frame.
Coordination and short-circuit protection
The mechanical endurance is 30 million operating cycles — typical for a Size S00 contactor in light-duty switching.