The Siemens 3RT1046-3AP60 is a SIRIUS power contactor in size S3, rated for motor loads up to 55 kW at 500 V and 25.4 kW at 690 V.
The AC-3 switching frequency of 850 operations per hour tells you this contactor is sized for frequent motor starting — conveyors, pumps, compressors that cycle several times a shift. AC-4 maxes at 250 ops/h, which covers plugging and inching duty. The mechanical life of 10 million cycles typical means the coil and armature outlast the electrical contacts under normal use; the replaceable contacts are the wear item. Wire range is generous: solid accepts 2x 0.25 to 2.5 mm² for control wiring, stranded accepts 2x 10 to 50 mm² for power lugs. That covers everything from 14 AWG control circuits to 1/0 AWG motor feeders without adapters.
Dimensions are 146 mm high, 70 mm wide, 139 mm deep. The 70 mm width is the S3 standard — it occupies three 18 mm module positions on a DIN rail, leaving room for side-by-side mounting without derating. The 139 mm depth includes the coil terminals; allow 160 mm clearance in front for wiring access. That's fast enough for most coordination studies; verify with upstream breaker trip curves if you're running a selective coordination study to IEC 60947.