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Siemens 3RH2140-4BW40 — Contactors

Siemens 3RH2140-4BW40 SIRIUS Auxiliary Contactor, S00, 4 NO

MPN3RH2140-4BW40

Siemens SIRIUS 3RH2140-4BW40 auxiliary contactor, size S00, 4 NO instantaneous contacts, screw and snap-on mounting on 35 mm DIN rail, 45 mm width, 73 mm depth, 57.5 mm height.

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

Specifications

3RH2140-4BW40 — Identification
ParameterValue
Contactor frame sizeS00
3RH2140-4BW40 — 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
3RH2140-4BW40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH2140-4BW40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2140-4BW40 — Connection & Mounting
ParameterValue
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail
3RH2140-4BW40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH2140-4BW40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2140-4BW40 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth73 mm
3RH2140-4BW40 — Specifications
ParameterValue
At AC10 000 1/h

Product details

S00 auxiliary contactor for panel builders

The 3RH2140-4BW40 is a SIRIUS auxiliary contactor in size S00 — the smallest frame in the Siemens SIRIUS family, designed for control-circuit switching in motor starter and relay logic panels.

Rated currents and switching capability

The rated impulse withstand voltage is 6 kV, which supports installation in environments with surge category III per IEC 60947-1, typical for industrial control panels fed from a 400 V distribution system.

MPN
3RH2140-4BW40