What it is and what it does
The Siemens SIRIUS 3RT2024-1AU60 is an S0-frame power contactor built for switching motor loads in control panels. It carries a 480 V AC-3 rating of 11 A, which is the real-world number you use when sizing it for a three-phase induction motor — that 11 A governs the contactor's life under full-load starts, not some resistive bench test. It mounts on a 35 mm DIN rail per EN 60715, with screw and snap-on fastening, and the mounting position is forgiving: you can rotate it ±180° on a vertical surface or tilt it ±22.5° forward and backward, which helps when you're shoehorning it into a crowded enclosure. The contactor includes an auxiliary switch, so you don't have to hunt for a separate add-on block for basic status feedback to the PLC or a holding circuit.
Key ratings and what they mean for fit
AC-3 switching at 480 V is the headline: 11 A means this contactor handles a motor drawing about 7.5 hp at that voltage, factoring in inrush. The AC-3 duty cycle maxes out at 1,000 operations per hour, which covers most conveyor, pump, and fan applications without breaking a sweat. Wire termination accepts solid or stranded conductors from 1 to 10 mm², with the screw-type terminals on the coil side. For the main contacts, you're looking at AWG 16 to 8 roughly, which is standard for this frame class. Operating temperature spans -25 to +60 °C, with storage from -55 to +80 °C. That -25 °C low end means it's fine for unheated plant spaces in most climates, but if you're in a deep-freeze warehouse, you'll want to verify the coil pick-up at the actual ambient.