Siemens 3RT1076-6SP36 SIRIUS Power Contactor — Size S12, 200-277 V AC Coil
It is a current-production part, still in active manufacture per the manufacturer's lifecycle record. The coil is rated for 200-277 V AC, with a pickup threshold of 0.8 x rated value and a dropout of 0.4 x rated value at 50/60 Hz. The magnet coil uses screw-type terminals. Rated operational current for the main poles is not directly listed in this excerpt, but the contactor accepts stranded main conductors from 70 to 240 mm², indicating a high-current capability consistent with the S12 frame size. Auxiliary contacts are included. The contactor mounts via screw fixing with four 11 mm diameter holes.
Duty Ratings and Switching Frequency
Maximum switching frequency varies by duty category: AC-1 (resistive) and AC-3 (motor starting) at 200 operations per hour, AC-2 (slip-ring motor) at 170 ops/h, AC-4 (plugging/inching) at 130 ops/h, and AC-3e at 200 ops/h. Arcing time is 10-15 ms. Typical mechanical life is 10,000,000 operations. The auxiliary contact ratings: 10 A at 24 V, 2 A at 48 V, and 2 A at 60 V. These are the rated values for the integrated auxiliary switch block.
Environmental and Reliability Data
The listed MTBF is 75 a (years), a reliability figure that applies under rated conditions per the manufacturer's calculation method. Dimensions: 214 mm height, 160 mm width, 225 mm depth. The contactor is designed for screw-fixing to a mounting plate, not DIN-rail snap-on — panel builders should account for the four-hole pattern with 11 mm diameter holes.
For buyers maintaining a BOM line on this SIRIUS contactor, the MTBF of 75 a and mechanical life of 10 million operations provide a basis for preventive replacement intervals in continuous-duty applications.