The Siemens 3RH2353-1CK20-0KA0 is a SIRIUS auxiliary contactor in the S00 frame size, carrying 5 normally-open instantaneous contacts. The 45 mm width and 57.5 mm height fit the standard S00 footprint, and the 117 mm depth leaves room for wiring ducts in a 200 mm deep panel.
Contact ratings and 120 V AC 60 Hz suitability
Yes, this part is suitable for 120 V AC 60 Hz control circuits. The rated operational voltage is 120 V at both 50 Hz and 60 Hz, with the 60 Hz operating range spanning 0.85 to 1.1 times the rated value — so a 120 V supply sitting within that band drives the coil reliably. The contacts carry 10 A at 24 V, and at 120 V AC the thermal current is 6 A at 230 V, 3 A at 400 V, so at 120 V the current capability is comfortably above the typical 1-2 A draw of a PLC output or relay coil. For DC control circuits, the contactor handles 10 A at 24 V and 4.7 A at 60 V, with the DC switching frequency rated at 10,000 operations per hour.