S3 frame, 24 VAC coil, screw terminals
The 3RT2344-1AC20: The contactor includes an integrated auxiliary switch (1 NO + 1 NC configuration typical for the S3 frame), eliminating the need for a separate add-on block in many basic interlocking or status-feedback circuits.
Panel fit and wiring capacity
Main circuit wiring accepts stranded conductors from 6 to 70 mm², covering most motor branch circuits up to the S3 current rating.
Auxiliary contact switching limits
These are not continuous thermal ratings but switching capacities — the 0.1 A at 600 V figure is the limit for pilot duty in 600 V class control schemes. At 48 V, 110 V, 125 V, 220 V, and 500 V, the auxiliary contacts are rated 2 A, 1 A, 0.9 A, 0.3 A, and 2 A respectively.
Environmental limits and endurance
The mechanical endurance is 10 million operating cycles typical, which is standard for the SIRIUS contactor family in cyclic duty applications like conveyor or pump control.