Mechanical endurance and contact ratings
The 3RH2122-1BB40-ZW97: Rated mechanical life is 30 million operating cycles — a figure that suits high-cycling applications like conveyor interlocking or valve sequencing where the contactor sees frequent on/off commands. The auxiliary contact block is expandable (product extension auxiliary switch = yes), so additional contact modules can be added to the base unit without removing the wiring.
Dimensions are 57.5 mm high, 45 mm wide, and 73 mm deep — the S00 footprint leaves room alongside a motor starter or PLC output module in a standard 600 mm deep enclosure.