It gives you 3 normally-open and 1 normally-closed contact set, driven by a 24 V DC coil with an integrated diode for back-EMF suppression. The coil hold range is 0.85 to 1.85 times the rated supply voltage — so it stays pulled in through a sag down to about 20.4 V and won't drop out until voltage falls well below that. Screw terminals and upright mounting position are standard for this frame; it snaps onto DIN rail and fits the same panel footprint as the S00 contactors it couples with.
Siemens 3RH2131-1VB40-1AA0 Coupling Contactor Relay, 24 V DC
MPN3RH2131-1VB40-1AA0
Siemens SIRIUS 3RH2131-1VB40-1AA0 coupling contactor relay, 24 V DC coil, 3 NO + 1 NC, integrated suppression diode, Size S00, screw terminal, upright mounting.
Source DocumentedChannel stated on listing & quote
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
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Frequently asked questions
Where can I buy the 3RH2131-1VB40-1AA0?
This part is sourced and quoted to order against an RFQ through independent distribution channels; availability and current pricing are confirmed at the time of quote.
What are the key specifications of the 3RH2131-1VB40-1AA0?
It is a coupling contactor relay with 3 NO + 1 NC contacts, a 24 V DC coil with an integrated diode, Size S00 frame, screw terminal connections, and upright mounting position. The coil operating range is 0.85 to 1.85 times the rated supply voltage.
MPN
3RH2131-1VB40-1AA0