SIRIUS S00 power contactor with 24 VDC coil and spring terminals
The Siemens 3RT2015-2BB42-ZW96 is a SIRIUS-branded power contactor in size S00, designed for switching motor loads and resistive circuits in industrial control panels. It carries a 24 VDC coil rated at 0.8 A initial inrush and 1.1 A holding current at full-scale, with spring-type terminals accepting 0.5 to 4 mm² solid or stranded wire (2x per clamp). The contactor mounts via screw or snap-on onto 35 mm DIN rail per EN 60715, occupying a 45 mm wide footprint on the rail. The 24 VDC coil holds at nominal voltage and drops out below the pick-up threshold; the DC arcing time of 7 to 13 ms on the main contacts means the arc extinguishes quickly, reducing contact wear during DC switching events.
Ratings and switching capability
The auxiliary contacts are rated for switching at various voltages: 10 A at 24 VDC, 2 A at 48 V and 60 VDC, 1 A at 110 VDC, 0.9 A at 125 VDC, 0.3 A at 220 VDC, and 3 A at 400 VAC. The motor horsepower rating at 230 V is 0.75 hp. These ratings define the maximum switching capacity for the auxiliary circuit — important when driving small relays, pilot lights, or PLC inputs in the same panel. Mechanical switching frequency varies by duty class: up to 1,000 operations per hour at AC-1 (resistive), 750/h at AC-2 and AC-3 (motor starting/running), and 250/h at AC-4 (plugging/inching). The AC-3e rating matches the AC-3 figure at 750/h. For high-cycle applications like conveyor indexing, the AC-4 limit governs — plan for 250 cycles per hour maximum. The main contacts are configured as 20... 12 (normally open / normally closed) per the evidence, and an auxiliary switch is included. The contactor can be mounted in any orientation with +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, giving flexibility in tight enclosures.
Environmental and mounting constraints
Operating temperature range is -25 to +60 °C, storage range -55 to +80 °C. The clearance distances required around the contactor are: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the sides. These are minimum air gaps for heat dissipation and arc flash containment — a panel layout that crowds the contactor against other components risks derating or nuisance tripping. Dimensions are 73 mm depth, 45 mm width, and 70 mm height. The spring-type terminal design accepts solid or stranded conductors from 0.5 to 4 mm², with a strip length that matches standard DIN-rail terminal blocks. No special tools needed beyond a screwdriver for the spring release.