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Siemens 3RH2140-1FB40 — Contactors

Siemens 3RH2140-1FB40 SIRIUS Auxiliary Contactor, 4 NO

MPN3RH2140-1FB40
Active

Siemens SIRIUS auxiliary contactor, 3RH2140-1FB40, size S00, 4 NO instantaneous contacts, 24 VDC coil with integrated diode suppression, screw and snap-on 35 mm DIN rail mounting.

$25.40Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RH2140-1FB40 — Identification
ParameterValue
Contactor frame sizeS00
3RH2140-1FB40 — 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
3RH2140-1FB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH2140-1FB40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2140-1FB40 — 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
3RH2140-1FB40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH2140-1FB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2140-1FB40 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth73 mm
3RH2140-1FB40 — Specifications
ParameterValue
At AC10 000 1/h

Product details

S00 frame, 4 NO, 24 VDC coil — panel fit and switching capacity

The 3RH2140-1FB40: It carries 4 normally-open instantaneous contacts rated for 10 A at both 24 V and 230 V, with a mechanical life of 30 million operations typical — the contact set handles pilot-duty loads, PLC inputs, and signal interlocking in motor starter assemblies. The DC coil is rated 24 V with an integrated diode surge suppressor, drawing 4 W closing power — the diode clamps the flyback spike, so no external snubber is needed on the control circuit.

Lifecycle and compliance — current production, RoHS dated

RoHS compliance date is 10/01/2009 — the part meets the EU RoHS substance restrictions effective from that date. No UL or CSA listing is stated in the spec record; verify site-specific acceptance with the local authority.

MPN
3RH2140-1FB40