S2 contactor for 690 V AC-3 motor switching — active line, screw terminals
The Siemens 3RT7036-1AV00 is a size S2 contactor from the SIRIUS family, rated for AC-3 switching up to 690 V maximum — that covers 400 V and 480 V motor loads with headroom for 690 V IEC networks. Three main NO contacts handle the power circuit; screw-type terminals on both main and auxiliary circuits accept 2x (0.5…1.5 mm²) solid or 2x (0.75…2.5 mm²) stranded copper. The DC coil holds at 0.36 W and pulls in at 0.79 W, which keeps the control transformer small in a multi-contactor panel.
Coordination and selectivity — fuse sizing for Type 1 and Type 2
This matters when the panel designer is coordinating with upstream MCCB or fuse-switch ratings — the 80 A Type 2 limit is the tighter constraint for selectivity studies.
Auxiliary contact compatibility and PLC-level switching
The contactor accepts a product extension auxiliary switch block, which is useful when adding early-make or late-break contacts for feedback to a PLC. DC-13 switching at 220 V is rated at 0.3 A, covering small DC solenoids and indicator lamps in the control circuit.
Shock resistance is 15g at 5 ms and 8g at 10 ms sine pulse — adequate for most industrial panels but not for direct mounting on high-vibration machinery (a separate shock mount may be needed). Maximum mechanical switching rate is 800 operations per hour at AC-3 duty, dropping to 250 per hour at AC-4 (plugging/inching).