SIRIUS S10 contactor for high-cycle motor switching
The Siemens 3RT1466-6SP36 is a size S10 SIRIUS contactor rated for 200-277 V AC/DC coil supply, with screw-type terminals on both coil and main power circuit. The 10 000 000 mechanical cycles and 75 a MTBF place this squarely in continuous-duty applications where contactor life drives the maintenance interval — think conveyor lines, pump stations, or compressor skids running multiple shifts. Coil pick-up and drop-out timing is symmetrical at 115-130 ms for both AC and DC supplies, which simplifies sequencing logic in safety circuits or coordinated motor starts. The arcing time of 10-15 ms is typical for this frame class and informs the minimum off-time for reversing or inching applications. Power terminals accept stranded conductors from 70 up to 240 mm², while the auxiliary and coil terminals handle 0.5-4 mm² solid or stranded. This wire range covers most panel-to-motor junction boxes without needing adapter lugs.
Mounting and integration flexibility
Mounting is by screw fixing through a single 11 mm hole, with the contactor body measuring 210 mm high, 145 mm wide, and 202 mm deep. The mounting position allows vertical surface orientation with ±90° rotation and ±22.5° tilt forward/backward, giving panel builders latitude in tight enclosures. Clearance requirements: 10 mm upwards, 10 mm downwards, 20 mm forwards, and 10 mm at the sides. These are the minimum air gaps for heat dissipation and arc quenching — stacking contactors closer than this derates the thermal capacity. The contactor accepts up to four attachable auxiliary switch blocks, and the auxiliary contacts are rated for 10 A at 24 V, 2 A at 48/60 V, 1 A at 110 V, 0.9 A at 125 V, and 0.3 A at 220 V — covering typical PLC-level signal loads.
Lifecycle and sourcing posture
Operating temperature range is -25 to +60 °C during operation, with storage from -55 to +80 °C. The 85 °C spread between storage and operating limits means the contactor can sit in an unheated warehouse or truck without degradation, but the panel ambient must stay under 60 °C when energised.