What this contactor is and where it fits
The Siemens 3RT2015-2AP61-ZX95 is a SIRIUS power contactor in Size S00 — the smallest frame in the family, built for switching motor loads in control panels. It measures 45 mm wide by 73 mm deep by 70 mm tall, so it tucks into a tight DIN-rail row alongside overload relays and terminal blocks. The spring-type terminals on the magnet coil accept solid or stranded wire from 0.5 to 4 mm², and the main contacts are rated for 10 A at 24 V — enough for small motors, solenoid valves, or resistive heater banks in a machine cell. Mounting is screw-and-snap onto 35 mm DIN rail per DIN EN 60715, and the contactor can be rotated ±180° on a vertical surface or tilted ±22.5° forward and backward — handy when you're shoehorning it into a crowded enclosure with awkward cable entry.
What the ratings mean for your panel
The 24 V coil pulls 10 A at rated value — that's the current the contacts can make and break under resistive load at that voltage. For inductive motor duty, the AC-3 maximum operating rate is 750 cycles per hour, and the AC-4 rate drops to 250 cycles per hour for plugging or inching service. The mechanical life is a typical 30 million operations, so this contactor will outlast most of the gear it switches. Operating temperature range is -25 to +60 °C, and storage range is -55 to +80 °C — that covers most indoor industrial environments, including unheated warehouses. The contactor can be mounted in any orientation within ±180° rotation and ±22.5° tilt, so you can lay it sideways or upside-down if the panel layout demands it.