S6 frame power contactor for continuous motor duty
The 3RT1054-6SP36-3PA0: This SIRIUS power contactor in the S6 frame size handles main power termination on stranded conductors from 25 mm² up to 120 mm² — the range covers most motor branch circuits from 30 A through roughly 250 A depending on duty class and ambient. The MTBF figure of 75 a reflects a reliability floor for continuous-duty applications — a line-down event on a conveyor or pump motor at these current levels justifies the premium for a known-quantity part over a generic substitute. Auxiliary contact rated 10 A at 24 VDC, 2 A at 48 VDC, and 2 A at 60 VDC — the DC switching capacity drops sharply above 24 V, so confirm the PLC input or relay load before wiring the aux circuit.
Thermal and mechanical cycling limits
Maximum operating frequency varies by duty class: 750 1/h in AC-1 and AC-3, 400 1/h in AC-2, and only 130 1/h in AC-4 — the AC-4 figure governs plugging and inching cycles where the arc energy per operation is highest. Typical mechanical life of 10 million operations means the contactor outlasts most motor rewinds in high-cycle applications — the electrical life at rated current is the limiting factor, not the mechanical wear.
Panel fit and mounting flexibility
Mounting position allows vertical surface ±90° rotatable and ±22.5° tiltable to front and back — useful when the contactor shares a sub-panel with a VFD or filter that forces a non-vertical orientation. Screw fixing via one 9 mm diameter hole — no DIN rail adapter on this variant; the panel builder drills a single mounting point and secures the contactor with an M8 bolt through the base.