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Siemens 3RH2371-2FB40 — Contactors

Siemens 3RH2371-2FB40 SIRIUS Auxiliary Contactor, 24 V DC, 7

MPN3RH2371-2FB40
Active

Siemens SIRIUS auxiliary contactor, size S00, 3RH2371-2FB40, 24 V DC coil, 7 NO instantaneous contacts, 10 A rated current, screw and snap-on mounting for 35 mm DIN rail.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RH2371-2FB40 — Identification
ParameterValue
Contactor frame sizeS00
3RH2371-2FB40 — 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 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V4.7 A
Rated value @ 110 V3 A
Rated value @ 220 V1.2 A
3RH2371-2FB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH2371-2FB40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2371-2FB40 — 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
3RH2371-2FB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
3RH2371-2FB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2371-2FB40 — Mechanical
ParameterValue
Width45 mm
Height70 mm
Depth121 mm
3RH2371-2FB40 — Specifications
ParameterValue
At AC10 000 1/h

Product details

It carries 7 instantaneous normally-open contacts, each rated at 10 A at 24 V, making it suitable for high-count signal multiplication or interlocking across multiple contactor coils and PLC inputs. The coil pulls in on 24 V DC with a 4 W holding power, and the built-in diode surge suppressor handles the inductive kickback — no external flyback diode needed across the coil terminals.

Mounts on a 35 mm DIN rail via the integrated snap-on latch, with screw terminals accepting 2 x 0.5 to 4 mm² solid or stranded wire. The S00 footprint takes up 45 mm width, 70 mm height, and 121 mm depth — plan the panel layout to leave 10 mm clearance above, below, and forward, plus 6 mm at the sides for airflow and wiring access.

The 10 A rating at 24 V DC is the continuous current each NO contact can carry in a control circuit. At higher voltages the current must be derated. The 7 NO contacts give you flexibility to wire multiple signal paths from a single coil — common in safety circuits where you need to mirror a status to several PLC inputs or to interlock multiple contactors.

Frequently asked questions

Will 3RH2371-2FB40 drop into a panel specified around 3RH2362-2AF00 without rewiring?

Both are SIRIUS size S00 auxiliary contactors with the same DIN rail footprint and screw terminal layout, so mechanical fit and wiring are identical. The difference is contact configuration: 3RH2371-2FB40 has 7 NO contacts, while 3RH2362-2AF00 has a different contact arrangement — verify your circuit needs before swapping.

What is the depth of 3RH2371-2FB40?

The depth is 121 mm, which is the dimension from the DIN rail mounting surface to the furthest front point of the contactor body.

What is the width of 3RH2371-2FB40?

The width is 45 mm, which is the space it occupies on the DIN rail — plan for at least 6 mm side clearance to adjacent devices.

MPN
3RH2371-2FB40