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Siemens 3RH2140-2BM40 SIRIUS Auxiliary Contactor, 4 NO, S00

MPN3RH2140-2BM40

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Siemens SIRIUS 3RH2140-2BM40 auxiliary contactor, size S00, 4 NO instantaneous contacts, screw and snap-on mounting on 35 mm DIN rail, 73 mm depth, 45 mm width, 70 mm height.

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Siemens 3RH2140-2BM40 datasheet (PDF)

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

Specifications

3RH2140-2BM40 — Identification
Parameter	Value
Contactor frame size	S00

3RH2140-2BM40 — 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

3RH2140-2BM40 — Control & Coil
Parameter	Value
Control supply voltage type	DC

3RH2140-2BM40 — Contacts & Poles
Parameter	Value
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

3RH2140-2BM40 — 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

3RH2140-2BM40 — Durability
Parameter	Value
Durability (operating cycles, typ.)	30 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

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

3RH2140-2BM40 — Mechanical
Parameter	Value
Width	45 mm
Height	70 mm
Depth	73 mm

3RH2140-2BM40 — Specifications
Parameter	Value
At AC	10 000 1/h

Product details

Auxiliary contactor for control-circuit switching

The Siemens 3RH2140-2BM40 is a SIRIUS auxiliary contactor in frame size S00, designed for switching control circuits in motor starter and automation panels.

Rated operational currents across voltage bands

The arcing time spans 10 to 15 ms at AC and 7 to 13 ms at DC, which informs the minimum off-time for the controlled load.

RoHS compliance is established with a substance prohibition date of 10/01/2009. The product extension supports an auxiliary switch block, and the magnet coil consumes 4 W closing and 4 W holding power at DC — a constant-hold design that simplifies the control transformer sizing.