Skip to main content
Log in
Siemens 3RW5235-6AC04 — Soft Starters

Siemens 3RW5235-6AC04 SIRIUS Soft Starter, 200-480 V

MPN3RW5235-6AC04
Active

Siemens SIRIUS 3RW5235-6AC04 soft starter, hybrid switching device, 200-480 V, 68 A minimum load, Trip Class 10A/10E/20E, PROFIBUS/Modbus RTU/TCP/EtherNet/IP/PROFINET, 24 V DC control, screw fixing, 306 x 185 x 203 mm.

Siemens 3RW5235-6AC04 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RW5235-6AC04 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS
3RW5235-6AC04 — Power & Motor Rating
ParameterValue
Rated motor power at 400 V (40 °C)75 kW
Rated motor power at 230 V (40 °C)37 kW
Rated operational current at 40 °C248 A
Rated operational current at 50 °C222 A
Rated operational current at 60 °C204 A
Rated insulation voltage600 V
Minimum settable current (% of Ie)15 %; Relative to smallest settable Ie
Power loss during startup (50 °C)1 807 W
3RW5235-6AC04 — Control & Connection
ParameterValue
Control supply voltage typeAC/DC
Rated voltage at 50 Hz24 V
Rated voltage at 60 Hz24 V
Main circuit terminal typebusbar connection
Control circuit wire range, solid1x (0.5 ... 4.0 mm²), 2x (0.5 ... 2.5 mm²)
Control circuit wire range, finely stranded (with ferrule)1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)
Analog outputYes; 4 ... 20 mA (default) / 0 ... 10 V (parameterizable with High Feature HMI)
Auxiliary contact rated current, AC-15 at 250 V3 A
Auxiliary contact rating (UL)R300-B300
Control supply voltage tolerance, AC 50 Hz (max.)20 %
Control supply voltage tolerance, AC 50 Hz (min.)-20 %
Control supply voltage tolerance, AC 60 Hz (max.)20 %
Control supply voltage tolerance, AC 60 Hz (min.)-20 %
Control supply frequency tolerance (max.)10 %
Control supply frequency tolerance (min.)-10 %
Operating frequency tolerance (max.)10 %
Operating frequency tolerance (min.)-10 %
Operating voltage tolerance, inside-delta (max.)10 %
Operating voltage tolerance, inside-delta (min.)-15 %
3RW5235-6AC04 — Protection & Features
ParameterValue
Motor overload protectionYes; Electronic motor overload protection
Thermistor motor protectionNo
Adjustable current limitationYes
Inside-delta connectionYes
Intrinsic device protectionYes
Pollution degree3, acc. to IEC 60947-4-2
3RW5235-6AC04 — Mechanical
ParameterValue
Height306 mm
Width185 mm
Depth203 mm
Weight6.6 kg
Mounting positionwith vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back
Fastening methodscrew fixing
Mounting clearance, top100 mm
Mounting clearance, bottom75 mm
Mounting clearance, side5 mm
Mounting clearance, front10 mm
3RW5235-6AC04 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C; Please observe derating at temperatures of 40 °C or above
Storage / transport temperature range-40 ... +80 °C
Max. installation altitude5 000 m; Derating as of 1000 m, see catalog
Ambient class during operation (IEC 60721)3K6 (no ice formation, only occasional 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)
3RW5235-6AC04 — Specifications
ParameterValue
Trip ClassCLASS 10A (default) / 10E / 20E; acc. to IEC 60947-4-2
Number Of Controlled Phases3
Utilization category according to IEC 60947-4-2AC 53a
Product Feature Integrated Bypass Contact SystemYes
Start-Up Ramp Time Of Soft Starter0 ... 20 s
3RW5235-6AC04 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

The Siemens 3RW5235-6AC04 is a SIRIUS soft starter — a hybrid switching device that ramps motor voltage up and down to limit inrush current and mechanical stress during start and stop. It's sized for a minimum motor load of 68 A (relative to the smallest settable Ie) and accepts a supply of 200 to 480 V. The Trip Class is configurable: default CLASS 10A, or select CLASS 10E or CLASS 20E per IEC 60947-4-2, which governs the thermal overload protection curve for the motor. Control voltage is 24 V DC, and the unit includes a 4-20 mA analog output (default) or 0-10 V (parameterizable with the High Feature HMI). It also supports Soft Torque and Pump Ramp Down — useful for reducing pressure surges in pump applications.

Fieldbus and communication options

This soft starter comes with onboard PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET standard. PROFIenergy is supported in connection with the PROFINET Standard communication module. That's a wide fieldbus palette — covers most PLC backbones without needing an extra gateway card.

Mounting and environmental ratings

Mounting is screw fixing on a vertical surface, rotatable ±90° and tiltable ±22.5° front-to-back. Dimensions: 306 mm high, 185 mm wide, 203 mm deep. Clearance requirements: 100 mm above, 10 mm in front, 75 mm below, 5 mm at the sides, 0 mm behind. Pollution degree 3 per IEC 60947-4-2, shock resistance 15 g / 11 ms (12 g / 11 ms with potential contact lifting).

Frequently asked questions

Does 3RW5235-6AC04 support Modbus TCP or Profibus?

Yes, it supports both Modbus TCP and PROFIBUS, along with Modbus RTU, EtherNet/IP, and PROFINET standard.

Is 3RW5235-6AC04 compatible with 480V and 24V DC control?

Yes, the rated supply voltage is 200 to 480 V, and the control supply is 24 V DC.

How to set trip class on Siemens soft starter 3RW5235?

The trip class is configurable: default CLASS 10A, or select CLASS 10E or CLASS 20E per IEC 60947-4-2. The exact method depends on the HMI or parameterization tool used.

MPN
3RW5235-6AC04