S00 frame, 45 mm wide, DIN rail mount
The 3RH2122-1BB40-ZX95: It carries 2 NO instantaneous contacts and a 24 VDC coil.
Coil draw and contact ratings
The DC magnet coil pulls 4 W both on pick-up and hold — no inrush spike to size a control transformer around.
Current production — sourced per RFQ
The lifecycle stage is listed as current — this is an active Siemens catalog number, not a discontinued or NRND line. The -ZX95 suffix indicates a customer-specific variant (likely a special version or marking), but the base 3RH2122-1BB40 is a standard SIRIUS auxiliary contactor still in regular production. No stock-holding claim is made; this is sourced through authorized distribution channels per RFQ.