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Siemens 3RH2131-2JB40 — Contactors

Siemens 3RH2131-2JB40 SIRIUS Coupling Relay, 24 V DC, 3 NO,

MPN3RH2131-2JB40
Active

Siemens SIRIUS 3RH2131-2JB40, coupling relay for switching auxiliary circuits, 24 V DC coil, 3 NO instantaneous contacts, 10 A rated, S00 frame size, screw and snap-on mounting on 35 mm DIN rail.

$25.40Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RH2131-2JB40 — Identification
ParameterValue
Contactor frame sizeS00
3RH2131-2JB40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V10 A
Rated value @ 24 V10 A
Rated value @ 60 V4.7 A
Rated value @ 110 V3 A
Rated value @ 220 V1.2 A
3RH2131-2JB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH2131-2JB40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2131-2JB40 — Connection & Mounting
ParameterValue
Conductor cross-section, solid or stranded2x (0,5 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail
3RH2131-2JB40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
3RH2131-2JB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2131-2JB40 — Mechanical
ParameterValue
Width45 mm
Height70 mm
Depth73 mm
3RH2131-2JB40 — Specifications
ParameterValue
At AC10 000 1/h

Product details

The coil pulls 2.8 W at 24 V DC and includes a built-in diode surge suppressor, so you don't need to add an external flyback diode on the coil circuit; just verify polarity before wiring.

The S00 frame (70 mm high, 45 mm wide, 73 mm deep) fits alongside contactors and overload relays in the same SIRIUS family, so the rail layout stays uniform.

The 10 A rating at both 24 V and 230 V AC is unusual — most relays derate at higher voltage. That means this part handles the same load current whether you're switching a 24 V DC pilot light or a 230 V AC contactor coil, so you don't oversize for the worst case. At DC the switching frequency is lower — 38 to 65 ms per cycle — which is typical for inductive DC loads where the arc extinguishes slower.

Frequently asked questions

What is the closest functional alternative to 3RH2131-2JB40?

The 3RH2122-1WB40 is a peer in the same SIRIUS S00 family, but it has 2 NO + 2 NC contacts versus the 3 NO on the 3RH2131-2JB40. The coil voltage and mounting footprint are the same, so it drops into the same DIN-rail position without rewiring the rail — just verify the contact configuration matches your circuit logic.

MPN
3RH2131-2JB40