Integrator's Spec Brief
The Siemens 3RT2018-2AV01 is a SIRIUS power contactor in size S00, designed for switching motor loads in control panels. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, with a 45 mm width footprint that fits standard enclosure backpanels. The coil connection uses spring-type terminals, while the main contacts accept solid or stranded conductors from 0.5 to 4 mm², or 2x (0.5 to 4 mm²) for paralleled feeds.
Key Ratings and What They Mean for Fit
The contactor is rated 10 A at 24 V for the main contact circuit — this is the continuous current it can carry at that voltage level, not the motor full-load current. For motor switching duty (AC-3), the maximum mechanical switching rate is 750 operations per hour, which governs how fast you can cycle a motor start/stop without overheating the contacts. The AC-4 (plugging/reversing) rate drops to 250 operations per hour, reflecting the higher electrical stress of inching or reversing under load. The operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, giving flexibility in tight enclosures. Clearance requirements: 10 mm upwards, 10 mm downwards, 10 mm forwards, and 6 mm to the side — critical for airflow and arc flash containment. The typical mechanical service life is 30,000,000 operations. An auxiliary switch is included for status feedback.
Panel Integration Notes
The 45 mm width and 73 mm depth fit standard DIN-rail layouts; the 70 mm height leaves room for busbars or wiring ducts above. Spring-type coil terminals reduce wiring time compared to screw terminals — no torque driver needed for the coil circuit. Main contact torque range is 20 to 12 Nm (likely a range for different conductor sizes, though the evidence lists it as a range).