The 3RH2122-1AN20 is a size S00 auxiliary contactor from the Siemens SIRIUS family, designed for screw and snap-on mounting onto a standard 35 mm DIN rail. Its 45 mm width and 73 mm depth fit into a compact panel slot, with 6 mm clearance needed at the sides and 10 mm above and below for airflow and wiring access.
Contact Ratings and Switching Capacity
This auxiliary contactor carries 2 NO instantaneous contacts rated 10 A at both 24 V and 230 V, making it suitable for switching control signals and small loads in a panel. At 400 V the rating drops to 3 A, and at 690 V to 1 A — derate accordingly for higher-voltage circuits. Mechanical life is typical 30,000,000 operations, so it holds up in high-cycle applications like packaging lines or conveyor interlocks.
Coil Compatibility and Operating Conditions
The coil operates at 220 V rated value at both 50 Hz and 60 Hz, with a tolerance range of 0.8...1.1 at 50 Hz and 0.85...1.1 at 60 Hz. Ambient operating temperature spans -25 to +60 °C, with storage from -55 to +80 °C.