Skip to main content
Log in
Siemens 3RW5227-3AC04 — Soft Starters

Siemens 3RW5227-3AC04 SIRIUS Soft Starter, 200-480 V

MPN3RW5227-3AC04
Active

Siemens SIRIUS hybrid switching device, soft starter 3RW5227-3AC04, rated 200...480 V, minimum operating current 40.5 A, trip class CLASS 10A (default) / 10E / 20E acc. to IEC 60947-4-2.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RW5227-3AC04 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS
3RW5227-3AC04 — Power & Motor Rating
ParameterValue
Rated motor power at 400 V (40 °C)45 kW
Rated motor power at 230 V (40 °C)22 kW
Rated operational current at 40 °C161 A
Rated operational current at 50 °C143 A
Rated operational current at 60 °C131 A
Rated insulation voltage600 V
Minimum settable current (% of Ie)15 %; Relative to smallest settable Ie
Power loss during startup (50 °C)1 077 W
3RW5227-3AC04 — Control & Connection
ParameterValue
Control supply voltage typeAC/DC
Rated voltage at 50 Hz24 V
Rated voltage at 60 Hz24 V
Main circuit terminal typebox terminal
Control circuit wire range, solid2x (0.25 ... 1.5 mm²)
Control circuit wire range, finely stranded (with ferrule)2x (0.25 ... 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 %
3RW5227-3AC04 — 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
3RW5227-3AC04 — Mechanical
ParameterValue
Height306 mm
Width185 mm
Depth203 mm
Weight6.9 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
3RW5227-3AC04 — 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)
3RW5227-3AC04 — 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
3RW5227-3AC04 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

Rated voltage 200…480 V, minimum load 40.5 A — what that means for your motor string

The Siemens SIRIUS 3RW5227-3AC04 is a soft starter covering a 200 to 480 V supply range, with a minimum settable operating current of 40.5 A. That minimum matters: the unit won't regulate below that threshold, so it's sized for motor strings where the smallest motor draws at least that current — typically a 15–20 kW induction motor on 400 V three-phase, depending on service factor. The trip class defaults to CLASS 10A per IEC 60947-4-2, with selectable 10E or 20E for heavier starts like crushers or centrifuges. Mounting is screw-fix, with the vertical surface rotatable ±90° and tiltable ±22.5° front-to-back, giving flexibility in tight cabinets.

Fieldbus support: PROFIBUS, PROFINET, Modbus RTU/TCP, EtherNet/IP

This soft starter ships with native support for PROFIBUS, PROFINET (including PROFIenergy), Modbus RTU, Modbus TCP, and EtherNet/IP. That covers the major industrial Ethernet and fieldbus ecosystems — Siemens S7, Rockwell, and Modbus-based controllers all connect without an extra gateway. The analog output defaults to 4…20 mA, parameterizable to 0…10 V via the High Feature HMI accessory. Remote reset is handled by cycling the 24 V DC control supply. An error logbook is available but only with special accessories — factor that into your spares kit if fault logging is critical.

Frequently asked questions

Does 3RW5227-3AC04 support EtherNet/IP?

Yes, the 3RW5227-3AC04 natively supports EtherNet/IP alongside PROFIBUS, PROFINET with PROFIenergy, Modbus RTU, and Modbus TCP.

What is the minimum operating current for 3RW5227-3AC04?

The minimum settable operating current is 40.5 A. Below that threshold the soft starter cannot regulate, so it's suited for motor loads drawing at least that current at full load.

MPN
3RW5227-3AC04