Size S12 frame, 96-127 V coil — panel fit and control voltage
The 3RT1075-6SF36-3PA0: The magnet coil accepts 96-127 V AC or DC with a pickup threshold of 0.8× rated and a dropout floor of 0.4× rated at 50/60 Hz, so the control circuit must hold above ~77 V to keep the contactor sealed.
Switching duty cycles and auxiliary contact ratings
Maximum switching frequency is 200 operations per hour for AC-1, AC-2, AC-3, and AC-3e duty, dropping to 130 ops/h for AC-4 — the heavier breaking duty of AC-4 (plugging/inching) imposes the thermal limit on the arc chamber. Mechanical endurance is 10,000,000 operations typical — the electrical endurance will be lower and depends on the switched current and voltage per the duty class curves in the product manual.
Termination, mounting, and environmental limits
Main power terminals accept stranded conductors from 70 to 240 mm²; auxiliary terminals accept 2× (0.5-1.5 mm²), 2× (0.75-2.5 mm²), or max 2× (0.75-4 mm²) solid or stranded wire via screw-type connections.
Lifecycle and sourcing — active production, quoted to order
MTBF is listed at 75 a — this is a calculated figure under defined operating conditions and serves as a reliability benchmark for preventive maintenance scheduling, not a guaranteed service life.