What it is and what it does
The Siemens 3RT2023-1AU00 is a SIRIUS power contactor in the S0 frame size, designed for switching motor loads and resistive loads in industrial control panels. It mounts on a 35 mm DIN rail per DIN EN 60715 via screw and snap-on fastening, and its 45 mm width and 97 mm depth fit standard panel layouts without crowding adjacent devices.
Key ratings and what they mean for fit
Rated at 10 A at 24 V and 7.6 A at 480 V, this contactor handles moderate motor and general-purpose loads. The 24 VDC coil is standard for control circuits in North American and European panels. The S0 frame means the contactor is physically compact enough for high-density layouts but still carries auxiliary switch provisions. Wire termination accepts solid or stranded conductors from 1 to 10 mm², which covers most control and small power circuits. The screw-type terminals on the magnet coil are field-serviceable with a standard screwdriver. Operating temperature range of -25 to +60 °C and storage range of -55 to +80 °C suit unheated enclosures and warehouse conditions. The mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving flexibility in tight enclosures.
Panel integration notes
Clearance requirements: 10 mm upward, 10 mm forward, 10 mm downward, and 6 mm at the side. These spacings ensure proper arc quenching and heat dissipation. The contactor is rated for 1000 switching cycles per hour under AC-1, AC-2, AC-3, and AC-3e duty, and 300 cycles per hour under AC-4 duty.