SIRIUS size S6 power contactor — 96-127 V AC coil
It carries a 96-127 V AC coil with a pickup threshold of 0.8x rated value, meaning the coil pulls in reliably at about 77 V AC and holds through the nominal range. Main power terminals accept stranded conductors from 25 up to 120 mm² — sized for the larger cable lugs common on 100+ A motor circuits. The MTBF is listed at 75 years — a reliability figure that reflects the expected mean time between failures under continuous rated operation, not a warranty or service-life guarantee. Switching frequency varies by duty class: up to 750 cycles/hour for AC-1, AC-3, and AC-3e loads, 300 cycles/hour for AC-2, and 130 cycles/hour for AC-4. The auxiliary switch is included as standard, with screw-type coil terminals.
The size S6 contactor measures 172 mm high, 120 mm wide, and 170 mm deep. It is fastened with screw fixing through a single 9 mm mounting hole. These spacings allow for heat dissipation and arc-chamber venting — the arcing time is 10-15 ms. The main power terminals accept 25-120 mm² stranded, while the auxiliary and coil terminals use screw-type connections accepting 0.5-4 mm² solid or stranded wire (dual-entry for 0.5-1.5 mm² and 0.75-2.5 mm²).