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Siemens 3RH2131-2KB40 SIRIUS Coupling Relay, 24V DC, 3 Conta

MPN3RH2131-2KB40

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Siemens SIRIUS 3RH2131-2KB40 Coupling Relay for Switching Auxiliary Circuits, 24V DC Coil, 3 Contacts, S00 Size, 45x73x70mm, DIN Rail Mount.

$24.13Ref. price · indicative, final on quote

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Siemens 3RH2131-2KB40 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RH2131-2KB40 — Identification
Parameter	Value
Contactor frame size	S00

3RH2131-2KB40 — Ratings & Performance
Parameter	Value
Rated operational current, AC-12, max.	10 A
Rated value @ 400 V	3 A
Rated value @ 500 V	2 A
Rated value @ 690 V	1 A
Rated value @ 230 V	10 A
Rated value @ 24 V	10 A
Rated value @ 60 V	4.7 A
Rated value @ 110 V	3 A
Rated value @ 220 V	1.2 A

3RH2131-2KB40 — Control & Coil
Parameter	Value
Control supply voltage type	DC

3RH2131-2KB40 — Contacts & Poles
Parameter	Value
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

3RH2131-2KB40 — Connection & Mounting
Parameter	Value
Conductor cross-section, solid or stranded	2x (0,5 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule	2x (0.5 ... 2.5 mm²)
Mounting method	screw and snap-on mounting onto 35 mm DIN rail

3RH2131-2KB40 — Durability
Parameter	Value
Durability (operating cycles, typ.)	30 000 000

3RH2131-2KB40 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

3RH2131-2KB40 — Mechanical
Parameter	Value
Width	45 mm
Height	70 mm
Depth	73 mm

3RH2131-2KB40 — Specifications
Parameter	Value
At AC	10 000 1/h

Product details

Siemens SIRIUS 3RH2131-2KB40 coupling relay switches auxiliary circuits in control panels and motor starter assemblies. The relay carries a 24 V DC coil with a closing power of 2.8 W and provides 3 instantaneous contacts rated at 10 A at 24 V AC for resistive loads.

Duty and fit

The S00 frame footprint fits alongside standard contactors of the same frame size. Pollution degree 3 rated and operates from -25 to +60 °C; storage range is -55 to +80 °C. AC rated for 10 A at 24 V and 1 A at 690 V, with a maximum operating rate of 10 000 1/h. DC switching arcing time is 7…20 ms.

Current production part listed as active by Siemens; no last-time-buy or phase-out observed. Source via RFQ for lead time and pricing.