SIRIUS 3RT2518-1AV00 — Size S00 Contactor with Auxiliary Contacts
The Siemens 3RT2518-1AV00 is a SIRIUS-brand contactor in the compact S00 frame size, 45 mm wide and 57.5 mm tall with a 73 mm depth. It includes an integrated auxiliary switch and uses screw-type terminals for the magnet coil and main circuit connections. The contactor is rated for a rated insulation voltage of 400 V at both 50 Hz and 60 Hz.
Auxiliary Contact Ratings and Switching Capacity
The auxiliary switch handles 10 A at 24 V rated value, 10 A at 230 V rated value, 3 A at 400 V rated value, and derates to 0.1 A at 600 V rated value. At 48 V, 60 V, and 125 V rated values it carries 2 A; at 110 V rated value it carries 1 A; at 220 V rated value it carries 0.3 A; and at 440 V rated value it carries 0.8 A. These ratings define the maximum continuous current the auxiliary contacts can switch at each voltage level — useful for control circuits, signaling, or interlocking in the panel. Mechanical endurance is rated at 30,000,000 operating cycles typical, with a maximum switching frequency of 1,000 operations per hour at AC-1 duty and 10,000 operations per hour for DC switching. Arcing time spans 10 to 15 ms, and the AC operating time is 4 to 15 ms.
Mounting, Wiring, and Clearance
Mounting is via screw fixing or snap-on onto a 35 mm DIN rail per DIN EN 50022. The mounting position allows +/-180° rotation on a vertical surface and can be tilted forward or backward by +/-22.5° on a vertical surface. Side-by-side mounting is permitted, with a required clearance of 6 mm at the side and 0 mm upwards, downwards, forwards, and backwards. Terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². The screw-type coil terminals match the main circuit connection style.
Environmental Ratings
Operating temperature range is -25 to +60 °C during operation, with a storage range of -55 to +80 °C. The power factor is 0.25 at both 50 Hz and 60 Hz.