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Siemens 3RH2140-1BA40 — Contactors

Siemens 3RH2140-1BA40 SIRIUS Auxiliary Contactor, 4 NO, 45 m

MPN3RH2140-1BA40
Active

Siemens SIRIUS auxiliary contactor, 4 NO contacts, size S00, screw and snap-on mounting onto 35 mm DIN rail, 45 mm width, 73 mm depth.

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

Specifications

3RH2140-1BA40 — Identification
ParameterValue
Contactor frame sizeS00
3RH2140-1BA40 — 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
3RH2140-1BA40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH2140-1BA40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2140-1BA40 — 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
3RH2140-1BA40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH2140-1BA40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2140-1BA40 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth73 mm
3RH2140-1BA40 — Specifications
ParameterValue
At AC10 000 1/h

Product details

It mounts via screw or snap-on onto a standard 35 mm DIN rail, with a width of 45 mm and depth of 73 mm — a compact footprint for control-panel integration where auxiliary switching is needed alongside a main contactor.

The DC arc extinction time runs 7 to 13 ms, so the contacts clear fast enough for most PLC-driven interlock circuits. Closing and holding power of the magnet coil is 4 W DC — a steady 4 W draw that the control transformer or DC supply must budget for.

Clearance requirements: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward — useful when fitting into a tight enclosure corner.

Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. Pollution degree 3 (industrial environment with conductive pollution). RoHS compliance date reference is October 1, 2009. Relative humidity minimum 10%.

Frequently asked questions

What are the key mechanical dimensions of 3RH2140-1BA40?

Width 45 mm, height 57.5 mm, depth 73 mm. It mounts on 35 mm DIN rail.

Where can I buy 3RH2140-1BA40?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is the closest functional second-source for 3RH2140-1BA40?

The 3RH2140-1BP40 is a peer variant with the same S00 frame size and 4 NO contacts; the difference is in the coil voltage or auxiliary contact configuration. Both share the same DIN-rail footprint and clearance requirements, so they can drop into the same panel layout without rewiring.

What compliance documentation does 3RH2140-1BA40 carry?

The part has RoHS compliance dated October 1, 2009, and is rated for pollution degree 3 per IEC/EN 60947. Operating temperature -25 to +60 °C, storage -55 to +80 °C.

MPN
3RH2140-1BA40