Siemens SIRIUS, power contactor, size S2, 3RT1035-3XB40-0LA2, 24 VDC coil, 22 kW at 500 V AC-3, screw terminals, DIN rail mount.
| Parameter | Value |
|---|---|
| Contactor frame size | S2 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated operational current, AC-4 @ 400 V | 35 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 22 kW |
| Rated value @ 690 V | 11.4 kW |
| Rated value @ 230 V | 6 A |
| Rated value @ 24 V | 10 A |
| Rated value @ 60 V | 2 A |
| Rated value @ 110 V | 1 A |
| Rated value @ 220 V | 0.3 A |
| Parameter | Value |
|---|---|
| Control supply voltage type | DC |
| Parameter | Value |
|---|---|
| Main poles | 3 |
| Main NO contacts | 3 |
| Parameter | Value |
|---|---|
| Short-circuit coordination type 1, fuse | fuse gL/gG: 125 A |
| Short-circuit coordination type 2, fuse | fuse gL/gG: 63 A |
| Aux. switch short-circuit protection, fuse | fuse gL/gG: 10 A |
| Parameter | Value |
|---|---|
| Main circuit connection | screw-type terminals |
| Aux. / control circuit connection | spring-loaded terminals |
| Conductor cross-section, solid | 2x (0.25 ... 2.5 mm²) |
| Conductor cross-section, solid or stranded | 2x (0.75 ... 16 mm²) |
| Conductor cross-section, finely stranded w/ ferrule | 2x (0.25 ... 1.5 mm²) |
| Mounting method | screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022 |
| Side-by-side mounting | Yes |
| Parameter | Value |
|---|---|
| Durability (operating cycles, typ.) | 10 000 000 |
| Durability with aux. switch block (cycles, typ.) | 10 000 000 |
| Parameter | Value |
|---|---|
| Operating temperature range | -40 ... +70 °C |
| Storage temperature range | -55 ... +80 °C |
| Installation altitude, max. | 2 000 m |
| Parameter | Value |
|---|---|
| Width | 55 mm |
| Height | 142 mm |
| Depth | 130 mm |
The Siemens SIRIUS 3RT1035-3XB40-0LA2 is a size S2 power contactor rated to switch a 22 kW motor at 500 V in AC-3 duty — the rating that matters for standard three-phase induction motor loads. The 24 VDC coil pulls in at 0.7 of rated voltage and holds with a typical dropout below 18 V.
Clearance requirements: 10 mm upwards, 10 mm forwards, 10 mm at the side, 10 mm downwards — standard for the S2 frame. The 55 mm width and 142 mm height fit a typical 35 mm DIN-rail footprint.
This part is sourced to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — no stock or price figures are published here.
The 3RT1044-1FB46 is a larger-frame SIRIUS contactor (size S3) with a different coil voltage and terminal arrangement — it will not drop into a panel wired for the S2 footprint without rewiring the main power circuit and adjusting the DIN-rail layout.
The depth is 130 mm, measured from the mounting surface to the front of the contactor.
Siemens SIRIUS contactors typically carry CE, UL, CSA, and CCC approvals, plus RoHS and REACH declarations. Specific certification marks for this order code should be verified against the nameplate or the manufacturer's declaration of conformity.
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