SIRIUS coupling relay, 2 NO contacts, 45 mm wide
This is a Siemens SIRIUS 3RH2122-1VB40-ZX95 coupling relay, size S00, designed for switching auxiliary circuits in control panels.
Electrical ratings and switching capability
The coil is rated at 24 V DC with a closing power of 1.6 W. The pick-up voltage is 0.85 x rated value (20.4 V DC), and the drop-out voltage is 0.15 x rated value (3.6 V DC), ensuring reliable operation within the control voltage tolerance. The built-in diode surge suppressor protects the PLC output from voltage spikes when the coil de-energizes.
Depth is 73 mm, which fits standard 80 mm deep enclosures with clearance for wiring. This is tighter than some contactor families — plan the DIN rail layout accordingly to avoid overheating in dense panels.
The 3RH2122-1VB40-ZX95 is a standard catalog item within the SIRIUS contactor family. Compliance documentation includes RoHS conformity with substance prohibitance date 10/01/2009. The relay carries CE, UL, and CSA approvals per the SIRIUS family certification. Full declarations and certificates are available on request with the RFQ.