What This Part Is and What It Does
The Siemens 3RT2023-1XF40-0LA2 is a SIRIUS power contactor, size S0, designed for switching motor loads and resistive loads in industrial control panels. It is rated for a 110 VDC coil supply, with screw-type terminals for the magnet coil. The contactor mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, and its mounting position allows +/-180° rotation on a vertical surface, plus +/-22.5° tilt forward and backward.
Key Ratings and What They Mean for Fit
The 110 VDC coil draws a 15 A inrush peak, so the control transformer or DC supply must handle that surge without droop. The coil hold-in is rated for DC, with a drop-out time of 30 to 50 ms at DC — this matters for sequencing logic where you need predictable off-delay. Operating temperature spans -40 to +70 °C, which covers most indoor panel environments and some outdoor cabinets. Storage range is -55 to +80 °C. Wire termination accepts solid conductors: 2x (1 to 2.5 mm²) and 2x (2.5 to 10 mm²) for the main contacts, and 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) for auxiliary circuits. This covers standard control wiring up to 10 mm² for power feeds.
Integration Notes for the Panel Builder
The contactor occupies 45 mm width on the DIN rail, with a depth of 107 mm and height of 85 mm. Clearance requirements: 10 mm upward, 10 mm forward, 10 mm downward, and 6 mm at the side. This fits standard S0-size contactor spacing in most enclosures. Mechanical switching frequency: 1,000 operations per hour for AC-1, AC-2, AC-3, and AC-3e duty; 300 operations per hour for AC-4. The arcing time is 10 ms, consistent with DC coil contactors.