The Siemens 3RT1015-1AD02 is a SIRIUS S00 power contactor with a 24 VDC coil, rated for 10 A in AC-12 duty and 6.5 A in AC-4 at 400 V — the AC-4 figure governs motor reversing or plugging duty where the contactor makes and breaks stalled-rotor current. The S00 frame size keeps the depth to 72 mm and height to 57.5 mm, leaving room for auxiliary contact blocks or a solid-state timer alongside on the same rail.
Switching ratings and coordination
For DC switching, the contactor handles 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V — the DC arc limits are lower than AC, so use the voltage-specific rating for the load circuit. With type 2 coordination, a 20 A gL/gG fuse protects the contactor; type 1 coordination allows a 35 A fuse.
Termination and environment
Screw-type terminals on the main circuit accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid/stranded — the dual-wire entry saves a terminal block when paralleling conductors. Front and terminal protection is IP20, suitable for enclosed panel use.