What this contactor is and where it fits
The Siemens SIRIUS 3RT1015-1AF01-ZX95 is a Size S00 power contactor — the smallest frame in the SIRIUS family, built for switching motor loads and resistive loads in control panels. It measures 45 mm wide by 57.5 mm tall by 72 mm deep, so it tucks into tight DIN-rail enclosures without hogging space. The screw terminals accept solid or stranded wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or up to 2x (0.75 to 4 mm²) per clamp.
What the ratings mean for your motor load
Rated 10 A at 24 V for resistive or lightly inductive duty (AC-12). For motor switching, the AC-2 rating at 400 V is 3 kW, and the AC-4 rating at 400 V is 6.5 A — that's the figure that matters for reversing or inching duty, where the contactor makes and breaks stalled-rotor current. At 690 V it handles 4 kW, and at 500 V it handles 3.5 kW. The coil operates on 50/60 Hz at 0.8 to 1.1 times rated voltage (50 Hz) or 0.85 to 1.1 (60 Hz).
Where you'll use it — panel and environment
Snap-on mounting onto a 35 mm DIN rail per EN 50022. Side-by-side mounting is allowed without derating, so you can gang several contactors in a row. The front and terminals are rated IP20 — finger-safe for a panel, but not for washdown. Operating temperature range is -25 to +60 °C, and it's rated for pollution degree 3 (industrial environments with conductive or dry non-conductive pollution). Maximum installation altitude is 2000 m. Mechanical life is typical 30 million operations.