The 3 NO contact set provides three independent signal paths. At 24 V DC the contacts are rated for 10 A. The coil draws 3.2 W closing and holding, so it's a continuous-duty magnet — no extra inrush to budget for beyond the steady-state power supply load. The 24 V DC coil holds at nominal and drops out reliably below the dropout threshold typical of this class. The IP20 front protection means the terminals are finger-safe once the panel door is closed; no special tool access required.
Snap-on mounting onto a DIN rail, with an optional screw fix for vibration-prone locations. Size S00 means the 3RH1131 shares the same footprint as the smallest SIRIUS contactors — 45 mm wide per pole, so three auxiliary contactors fit in a 135 mm DIN rail section. The 73 mm depth leaves clearance behind a standard 80 mm deep enclosure.