What It Is and Where It Fits
The Siemens 3RT2026-1AL24-3MA0 is a SIRIUS power contactor in size S0, designed for switching motor loads in industrial control panels. It mounts via screw or snap-on onto a 35 mm DIN rail per EN 60715, making it a direct fit for standard panel layouts. The 24 VDC coil with screw-type terminals simplifies wiring in DC-controlled circuits.
Mounting and Wiring Details
The contactor accepts solid or stranded wire from 1 to 10 mm² for the main circuit, and 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) for auxiliary circuits. The screw-type terminals on the magnet coil are standard for panel wiring. Mounting position is flexible: +/-180° rotation on a vertical surface, and tilt forward/backward by +/-22.5° — useful when fitting into tight enclosures or angled subpanels. Clearance distances: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. These are minimum air gaps for heat dissipation and arc flash containment — don't crowd the contactor against other components or the enclosure wall.