Siemens 3RT2028-1AK60 is a SIRIUS S0 frame power contactor designed for motor switching in control panels and industrial machinery. It mounts on 35 mm DIN rail (screw and snap-on, per DIN EN 60715) and accepts solid or stranded conductors from 1 to 10 mm² (single) or two-wire combinations (0.5–2.5 mm²). The contactor includes a factory-fitted auxiliary switch. Storage temperature range -55 to +80 °C; operating -25 to +60 °C. The coil termination uses screw-type terminals.
Siemens 3RT2028-1AK60 SIRIUS S0 Power Contactor, AC-3 750 1/
MPN3RT2028-1AK60
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Siemens SIRIUS S0 power contactor 3RT2028-1AK60, screw terminal, DIN-rail snap-on, auxiliary switch, 750 ops/h at AC-3.
$60.96Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Contactor frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated operational current, AC-4 @ 400 V | 22 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 2 A |
| Rated value @ 690 V | 1 A |
| Rated value @ 230 V | 5 hp |
| 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 | AC |
| Rated value @ 50 Hz | 0.25 |
| Rated value @ 50 Hz | 110 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: 125A (690V,100kA), aM: 50A (690V,100kA), BS88: 125A (415V,80kA) |
| Short-circuit coordination type 2, fuse | gG: 50A (690V,100kA), aM: 25A (690V, 100kA), BS88: 50A (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 DIN 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 | 97 mm |
| Parameter | Value |
|---|---|
| At AC | 4 ... 16 ms |
Product details
Frequently asked questions
Will 3RT2028-1AK60 fit in a panel designed for 3RT2027-1AK60-0UA0?
Both contactors use the same S0 frame and 35 mm DIN-rail mounting. Coil voltage family is identical (1AK60 code). The auxiliary contact count may differ — the 3RT2028-1AK60 includes one auxiliary switch; the 0UA0 suffix may specify a different arrangement. Physical swap is possible, but confirm auxiliary circuit requirements before replacing.
MPN
3RT2028-1AK60