Siemens 3RW4028-2TB05
MPN3RW4028-2TB05
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SIRIUS soft starter S0 38 A, 22 kW/500 V, 40 °C 400-600 V AC, 24 V AC/DC spring-type terminals Thermistor motor protection
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
How we verify every order →Specifications
Identification
| Parameter | Value |
|---|---|
| Product designation | Soft starter |
| Product brand name | SIRIUS |
Power & Motor Rating
| Parameter | Value |
|---|---|
| Rated operational current at 40 °C | 38A |
| Rated operational current at 50 °C | 34A |
| Rated operational current at 60 °C | 31A |
| Rated insulation voltage | 600V |
| Minimum settable current (% of Ie) | 20% |
Control & Connection
| Parameter | Value |
|---|---|
| Control supply voltage type | AC/DC |
| Rated voltage at 50 Hz | 24V |
| Rated voltage at 60 Hz | 24V |
| Main circuit terminal type | spring-loaded terminals |
| Auxiliary contact rating (UL) | B300 / R300 |
| Control supply voltage tolerance, AC 50 Hz (max.) | 10% |
| Control supply voltage tolerance, AC 50 Hz (min.) | -15% |
| Control supply voltage tolerance, AC 60 Hz (max.) | 10% |
| Control supply voltage tolerance, AC 60 Hz (min.) | -15% |
| Control supply frequency tolerance (max.) | 10% |
| Control supply frequency tolerance (min.) | -10% |
| Operating frequency tolerance (max.) | 10% |
| Operating frequency tolerance (min.) | -10% |
Protection & Features
| Parameter | Value |
|---|---|
| Motor overload protection | Yes |
| Thermistor motor protection | Yes |
| Adjustable current limitation | Yes |
| Inside-delta connection | No |
| Intrinsic device protection | Yes |
| Pollution degree | 3, acc. to IEC 60947-4-2 |
Mechanical
| Parameter | Value |
|---|---|
| Height | 150mm |
| Width | 45mm |
| Depth | 155mm |
| Mounting position | With additional fan: With vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back Without additional fan: With vertical mounting surface +/-10° rotatable, with vertical mounting surface +/- 10° t |
| Fastening method | screw and snap-on mounting |
| Mounting clearance, top | 60mm |
| Mounting clearance, bottom | 40mm |
| Mounting clearance, side | 15mm |
Environmental
| Parameter | Value |
|---|---|
| Operating temperature range | -25 ... +60°C |
| Ambient class during operation (IEC 60721) | 3K6 (no formation of ice, no condensation), 3C3 (no salt mist), 3S2 (sand must not get into the devices), 3M6 |
| Ambient class during transport (IEC 60721) | 2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m) |
MPN
3RW4028-2TB05