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Siemens 3RW5227-3TC04 — Soft Starters

Siemens 3RW5227-3TC04 SIRIUS Soft Starter, 40.5 A Min

MPN3RW5227-3TC04
Active

Siemens SIRIUS 3RW5227-3TC04 soft starter, minimum 40.5 A, rated 200-480 V, Trip Class 10A (default) / 10E / 20E acc. to IEC 60947-4-2, with PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, PROFINET.

StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

Identification

3RW5227-3TC04 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS

Power & Motor Rating

3RW5227-3TC04 — 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

Control & Connection

3RW5227-3TC04 — 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 outputNo
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 %

Protection & Features

3RW5227-3TC04 — Protection & Features
ParameterValue
Motor overload protectionYes; Full motor protection (thermistor motor protection and electronic motor overload protection)
Thermistor motor protectionYes; Type A PTC or Klixon / Thermoclick
Adjustable current limitationYes
Inside-delta connectionYes
Intrinsic device protectionYes
Pollution degree3, acc. to IEC 60947-4-2

Mechanical

3RW5227-3TC04 — 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

Environmental

3RW5227-3TC04 — 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)

Specifications

3RW5227-3TC04 — 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

Electrical

3RW5227-3TC04 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

Minimum 40.5 A — sizing for the load, not the line

The 3RW5227-3TC04 has a minimum settable current of 40.5 A. Minimum load is 15 % relative to the smallest settable Ie. Rated voltage spans 200 to 480 V. Trip class defaults to CLASS 10A per IEC 60947-4-2, with selectable 10E and 20E curves. For a standard pump or fan load, 10A is adequate; for high-inertia starts (centrifuge, crusher), 20E buys the extra thermal budget. The soft starter's own thermal model tracks the motor heating curve, so the trip class selection governs the protection coordination with upstream motor circuit protectors.

Mounting and clearances — screw-fixed, not DIN-rail

Fastening method is screw fixing, not snap-on DIN rail. The mounting surface must be vertical; the unit is rotatable ±90° and tiltable ±22.5° to the front and back. Clearance requirements: 100 mm upwards, 10 mm forwards, 0 mm backwards, 75 mm downwards, 5 mm at the side. The 0 mm backwards clearance means the backplane can sit flush against the panel gland plate — useful when depth is tight. Overall dimensions: 306 mm height, 185 mm width, 203 mm depth.

Lifecycle and compliance — current production, CE/UL/CSA

Lifecycle stage is current. Approvals include CE marking, UL approval, and CSA approval. Pollution degree 3 per IEC 60947-4-2.

Frequently asked questions

Does 3RW5227-3TC04 support Modbus TCP and EtherNet/IP?

Yes, it supports Modbus TCP and EtherNet/IP natively, along with PROFIBUS, Modbus RTU, and PROFINET. The Ethernet ports auto-detect the active protocol stack.

How to reset a tripped 3RW5227-3TC04 after an overload?

The unit supports auto-reset and remote reset by turning off the control supply voltage. For manual reset, cycle the control supply off then on. The error logbook feature is available only in conjunction with special accessories.

Where can I buy 3RW5227-3TC04 and what is the lead time?

This part is sourced to order against your RFQ. Availability and pricing are confirmed at quote time.

MPN
3RW5227-3TC04