Siemens SIRIUS power contactor, size S0, 3RT2026-1AL24-3MA0, 24 VDC coil, screw-type terminals, 45 mm width, 141 mm depth.
| Parameter | Value |
|---|---|
| Contactor frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated operational current, AC-4 @ 400 V | 15.5 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 2 A |
| Rated value @ 690 V | 1 A |
| Rated value @ 230 V | 3 hp |
| Rated value @ 24 V | 6 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 | AC |
| Rated value @ 50 Hz | 0.25 |
| Rated value @ 50 Hz | 230 V |
| Parameter | Value |
|---|---|
| Main poles | 3 |
| Main NO contacts | 3 |
| Auxiliary contact reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Parameter | Value |
|---|---|
| Short-circuit coordination type 1, fuse | gG: 100 A (690 V, 100 kA), aM: 50 A (690 V, 100 kA), BS88: 100 A (415 V, 80 kA) |
| Short-circuit coordination type 2, fuse | gG: 35A (690V, 100kA), aM: 20A (690V, 100kA), BS88: 35A (415V, 80kA) |
| Aux. switch short-circuit protection, fuse | gG: 10 A (500 V, 1 kA) |
| Parameter | Value |
|---|---|
| Main circuit connection | screw-type terminals |
| Aux. / control circuit connection | screw-type terminals |
| Conductor cross-section, solid | 1 ... 10 mm² |
| Conductor cross-section, solid or stranded | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 standard mounting rail according to DIN EN 60715 |
| 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 | -25 ... +60 °C |
| Storage temperature range | -55 ... +80 °C |
| Installation altitude, max. | 2 000 m |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 85 mm |
| Depth | 141 mm |
| Parameter | Value |
|---|---|
| At AC | 4 ... 16 ms |
The 24 VDC coil with screw-type terminals simplifies wiring in DC-controlled circuits.
The contactor accepts solid or stranded wire from 1 to 10 mm² for the main circuit, and 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) for auxiliary circuits. These are minimum air gaps for heat dissipation and arc flash containment — don't crowd the contactor against other components or the enclosure wall.
The closest functional peer is 3RT2026-1AG20, which shares the same size S0 frame and 24 VDC coil voltage. The key difference is that 3RT2026-1AG20 uses spring-cage terminals instead of screw-type terminals on the 3RT2026-1AL24-3MA0. If your panel is wired for screw terminals, the 3RT2026-1AG20 would require a wiring change to spring-cage connections.
It accepts solid or stranded wire from 1 to 10 mm² for the main circuit. For auxiliary circuits, it accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²).
Yes, the physical footprint (size S0, 45 mm width, DIN-rail mounting) is identical. The only difference is the terminal type: 3RT2026-1AL24-3MA0 uses screw-type terminals, while 3RT2026-1AG20 uses spring-cage terminals. No rewiring of the panel layout is needed, but the wiring method differs.
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