The headline rating is 10 A at AC-12 (resistive loads at 24 V), which is the maximum continuous current the contacts can carry in that duty class. For inductive switching at higher voltages, the rated current drops: 6 A at 230 V, 3 A at 400 V, 1 A at 690 V — so the actual load determines whether this contactor holds up. The 4 NO configuration means it can switch four independent control circuits simultaneously, typical for signaling, interlocking, or extending the auxiliary contacts of a larger power contactor. The solid wire capacity accepts 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm² — enough for most control wiring without needing ferrules, though ferruled stranded is also fine.
Siemens 3RH1140-1AV00 SIRIUS Auxiliary Contactor, 4 NO, S00,
MPN3RH1140-1AV00
Siemens SIRIUS auxiliary contactor, 3RH1140-1AV00, size S00, 4 NO instantaneous contacts, 10 A AC-12 rated, screw and snap-on mounting, IP20 front.
$25.08Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Contactor frame size | S00 |
| Parameter | Value |
|---|---|
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 2 A |
| Rated value @ 690 V | 1 A |
| Rated value @ 230 V | 6 A |
| Rated value @ 24 V | 10 A |
| Rated value @ 110 V | 1 A |
| Rated value @ 220 V | 0.27 A |
| Parameter | Value |
|---|---|
| Control supply voltage type | AC |
| Rated value @ 50 Hz | 0.8 ... 1.1 |
| Rated value @ 50 Hz | 400 V |
| Parameter | Value |
|---|---|
| Auxiliary contact reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Parameter | Value |
|---|---|
| Aux. switch short-circuit protection, fuse | fuse gL/gG: 10 A |
| Parameter | Value |
|---|---|
| Conductor cross-section, solid | 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) |
| 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 |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 57.5 mm |
| Depth | 72 mm |
Product details
Frequently asked questions
Where can I buy 3RH1140-1AV00 and how do I get a price?
This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time.
What is the contact configuration of 3RH1140-1AV00?
It has 4 normally-open (NO) instantaneous contacts. There are no delayed, lagging, or make-before-break contacts.
What is the rated operational current at AC-12?
The maximum operating current at AC-12 is 10 A. For inductive loads at higher voltages, derate per the switching capacity table: 6 A at 230 V, 3 A at 400 V, 1 A at 690 V.
What mounting options does 3RH1140-1AV00 support?
It supports both screw fixing and snap-on mounting onto a DIN rail. The mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward.
MPN
3RH1140-1AV00