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Siemens 3RH2140-1BM40 SIRIUS Auxiliary Contactor, S00, 4 NO

MPN3RH2140-1BM40

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Siemens SIRIUS 3RH2140-1BM40 auxiliary contactor, size S00, 4 normally open instantaneous contacts, 220 V DC coil, screw and snap-on 35 mm DIN rail mounting.

$21.59Ref. price · indicative, final on quote

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Siemens 3RH2140-1BM40 datasheet (PDF)

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

Specifications

3RH2140-1BM40 — Identification
Parameter	Value
Contactor frame size	S00

3RH2140-1BM40 — 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

3RH2140-1BM40 — Control & Coil
Parameter	Value
Control supply voltage type	DC

3RH2140-1BM40 — Contacts & Poles
Parameter	Value
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

3RH2140-1BM40 — Connection & Mounting
Parameter	Value
Conductor cross-section, solid or stranded	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, finely stranded w/ ferrule	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting method	screw and snap-on mounting onto 35 mm DIN rail

3RH2140-1BM40 — Durability
Parameter	Value
Durability (operating cycles, typ.)	30 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

3RH2140-1BM40 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

3RH2140-1BM40 — Mechanical
Parameter	Value
Width	45 mm
Height	57.5 mm
Depth	73 mm

3RH2140-1BM40 — Specifications
Parameter	Value
At AC	10 000 1/h

Product details

Auxiliary contactor for control-circuit switching

The Siemens 3RH2140-1BM40 is a SIRIUS auxiliary contactor in frame size S00, designed for switching control circuits — not motor loads — in industrial panels.

Frequently asked questions

Will 3RH2140-1BM40 drop into a panel specified around 6ED1052-1MD08-0BA1?

No — 6ED1052-1MD08-0BA1 is a Siemens LOGO! module, not a contactor. The 3RH2140-1BM40 is a DIN-rail-mounted auxiliary contactor with a different function, wiring, and footprint. No direct drop-in compatibility exists.