The Siemens 3RH1122-1BG40-0AA6 is a SIRIUS auxiliary contactor in size S00, designed for control-circuit switching in industrial panels. It carries 2 normally-open and 2 normally-closed instantaneous contacts, with a rated insulation voltage of 125 V and surge voltage resistance rated at 6 kV. Switching capacity is specified per voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. At 110 V the rated current is 1 A, and at 220 V it is 0.27 A. These values define the contact's thermal and breaking capability at each voltage level — select the row matching your control voltage. The contactor mounts via screw fixing or snap-on onto a DIN rail, per the fastening method listed. Its 45 mm width and 57.5 mm height fit the standard S00 footprint, with a depth of 72 mm. Mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward.
Wire Termination and Environmental Limits
Terminals accept solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm². AWG equivalents are 2x (20 to 16), 2x (18 to 14), and 1x 12. This covers common control wiring sizes for auxiliary circuits. Front-side protection class is IP20, suitable for enclosed panel installation. Ambient operating temperature range is -25 to +60 °C; storage and transport range is -55 to +80 °C. Pollution degree 3 (conductive pollution) per the spec, meaning the contactor is rated for industrial environments where temporary condensation may occur. Shock resistance: 10g for 5 ms and 5g for 10 ms. Mechanical endurance: 30,000,000 operating cycles typical.
Coil Power and Auxiliary Extension
DC magnet coil draws 3.2 W for closing and holding. The product extension auxiliary switch is supported (yes), meaning additional contact blocks can be added to the side of this base unit. The reference code per IEC 81346-2 is K.
Lifecycle and Sourcing
Substance prohibitance date of 01 July 2006 confirms RoHS compliance for the part as manufactured after that date. No further compliance documentation (UL, CSA, CE) is explicitly listed in the evidence, but the SIRIUS series typically carries these approvals — verify the specific nameplate marking on the unit received.