The Siemens 3RH1122-2AP60 is a SIRIUS auxiliary contactor in size S00, carrying two normally-open instantaneous contacts and no delayed, lagging, or make-before-break switching elements. It is designed for control-circuit isolation and signal feedback in motor starter assemblies and contactor banks, mounting via screw or snap-on onto a DIN rail.
Contact ratings and switching capability
The 3RH1122-2AP60's contacts are rated for 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V — covering the typical control-voltage range from 24 VDC up to 690 VAC. At 110 V the rating drops to 1 A, and at 220 V it is 0.27 A. These are the thermal current ratings; the actual switching capacity depends on the load type and duty cycle, but the 6 kV surge voltage resistance and pollution degree 3 indicate the contactor is built for industrial environments with transient overvoltages and conductive contamination.
Mechanical endurance and reliability
Rated for 30 million mechanical operating cycles typical, with a contact reliability of one incorrect switching operation per 100 million operations at 17 V, 1 mA. This makes it suitable for high-cycle applications like conveyor interlocking or valve position feedback where contact weld or miss is a downtime risk. Shock resistance is 10g / 5 ms and 5g / 10 ms, adequate for panel-mounted equipment in most industrial machinery.
Mounting and environmental specs
The mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving flexibility in tight enclosures. Operating temperature range is -25 to +60 °C; storage and transport range is -55 to +80 °C. Front protection is IP20, so it is not rated for washdown — keep it inside a panel with at least IP54 enclosure.
Wiring and termination
Accepts solid conductors of 2x 0.25 to 2.5 mm². The 73 mm depth, 45 mm width, and 60 mm height fit the standard S00 footprint, so it occupies the same panel space as other SIRIUS S00 contactors and auxiliary blocks.