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Siemens 3RH2131-1BB40-1AA0 — Contactors

Siemens 3RH2131-1BB40-1AA0 SIRIUS Auxiliary Contactor, 24 V

MPN3RH2131-1BB40-1AA0
Active

Siemens SIRIUS auxiliary contactor, Size S00, 3RH2131-1BB40-1AA0, 24 V DC coil, 3 NO instantaneous contacts, 10 A rated, screw and snap-on 35 mm DIN rail mounting.

$20.57Ref. price · indicative, final on quote
Siemens 3RH2131-1BB40-1AA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RH2131-1BB40-1AA0 — Identification
ParameterValue
Contactor frame sizeS00
3RH2131-1BB40-1AA0 — 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
3RH2131-1BB40-1AA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH2131-1BB40-1AA0 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2131-1BB40-1AA0 — Connection & Mounting
ParameterValue
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail
3RH2131-1BB40-1AA0 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH2131-1BB40-1AA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2131-1BB40-1AA0 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth73 mm
3RH2131-1BB40-1AA0 — Specifications
ParameterValue
At AC10 000 1/h

Product details

The Siemens SIRIUS 3RH2131-1BB40-1AA0 is a Size S00 auxiliary contactor with a 24 V DC coil and three normally-open instantaneous contacts rated at 10 A at 24 V.

DIN-rail footprint and clearance

The standing mounting position on a horizontal surface is specified, so vertical rail orientation needs a check against the datasheet.

Contact ratings and switching life

The 3 NO contacts are rated for AC-15 and DC-13 loads across a wide voltage range: 10 A at 24 V and 230 V, 3 A at 110 V and 400 V, 1.2 A at 220 V, 0.5 A at 440 V, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V. That's a solid MTBF for a critical-spare holding in a conveyor or pump panel.

Frequently asked questions

Does 3RH2131-1BB40-1AA0 drop into a panel wired for 3RH2122-1BA40?

Yes — both are Size S00 on 35 mm DIN rail with the same footprint. The terminal wiring capacity is identical (2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm² solid/stranded). The only difference is the contact arrangement and coil voltage; verify those match your control scheme before swapping.

What compliance documentation does Siemens provide for this contactor?

RoHS compliance is confirmed with a substance prohibition date of 10/01/2009. The product carries Siemens SIRIUS brand documentation including CE, UL, and CSA certifications per the standard SIRIUS family declarations. Specific cert numbers are available on request with the RFQ.

MPN
3RH2131-1BB40-1AA0