The Siemens 3RT2018-2AB01-1AA0 is a SIRIUS power contactor in the size S00 frame — the smallest SIRIUS contactor footprint, at 45 mm wide, 70 mm tall, and 73 mm deep. The contactor mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, and is rated for operation in ambient temperatures from -25 to +60 °C, with storage range from -55 to +80 °C. The mounting position is standing on a horizontal surface.
For DC switching, the contactor carries specific current ratings at different voltages: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, and 0.2 A at 440 V. These are the maximum DC-1 resistive load currents at those voltages — use them to match the contactor to your DC load circuit. Switching frequency limits are 1000 cycles/hour at AC-1, 750 at AC-2 and AC-3, and 250 at AC-4. This eliminates the need for screwdriver torque control during wiring — a time-saver in panel assembly.