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.
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
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
| Parameter | Value |
|---|---|
| Contactor frame size | S00 |
| 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 |
| Parameter | Value |
|---|---|
| Control supply voltage type | DC |
| Parameter | Value |
|---|---|
| Auxiliary contact reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| 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 |
| Parameter | Value |
|---|---|
| Durability (operating cycles, typ.) | 30 000 000 |
| Durability with aux. switch block (cycles, typ.) | 10 000 000 |
| Parameter | Value |
|---|---|
| Operating temperature range | -25 ... +60 °C |
| Storage temperature range | -55 ... +80 °C |
| Installation altitude, max. | 2 000 m |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 57.5 mm |
| Depth | 73 mm |
| Parameter | Value |
|---|---|
| At AC | 10 000 1/h |
Product details
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.
MPN
3RH2140-1BM40