The Siemens 3RT1034-3AR60 is a SIRIUS power contactor in size S2, designed for switching motor loads and resistive loads in industrial control panels. It mounts via screw and snap-on onto 35 mm standard mounting rail per DIN EN 50022, so it integrates directly into a standard panel layout without adapters. Rated for AC-3 duty at 400 V, 50 Hz, this contactor handles motor switching up to 18.5 kW at 500 V, 50 Hz, and 10 kW at 690 V, 50 Hz. The AC-1 maximum switching rate of 1 200 cycles per hour means it can handle frequent resistive load switching without overheating — useful for oven or heater banks. The auxiliary contact block on this unit is rated for 10 A at 24 V AC, 6 A at 230 V, and 3 A at 400 V — these are the signal-side ratings that govern interfacing with a PLC input or a relay coil. The front face carries IP20 protection, while the terminal area is IP00, meaning the wiring compartment is open and must be inside a panel or enclosure.
Mounting and wiring
Snap-on mounting onto 35 mm DIN rail per EN 50022. Width is 55 mm, height 112 mm, depth 115 mm — check gland-plate clearance if the panel is shallow. Side-by-side mounting is permitted, so multiple contactors can pack tightly on the rail without derating for heat buildup at rated loads. Main circuit terminals are screw-type, accepting 2x (0.75... 25 mm²) stranded or 2x (0.25... 2.5 mm²) solid. The auxiliary circuit accepts 2x (0.75... 16 mm²) stranded or solid.
Environmental and endurance
Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. Pollution degree 3 means it tolerates conductive pollution (dry non-conductive dust that becomes conductive with condensation) — typical for industrial control panels not in clean-room environments. Mechanical endurance is 10 000 000 operations typical, so it outlasts most panel designs.