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Siemens 3RW5234-2AC05 — Soft Starters

Siemens 3RW5234-2AC05 SIRIUS Soft Starter, 53 A, 200-600 V

MPN3RW5234-2AC05
Active

Siemens SIRIUS 3RW5234-2AC05 soft starter, 53 A minimum, 200-600 V, Class 10A/10E/20E, PROFINET/Modbus/EtherNet/IP, screw fixing, 306x185x203 mm.

Siemens 3RW5234-2AC05 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RW5234-2AC05 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS
3RW5234-2AC05 — Power & Motor Rating
ParameterValue
Rated motor power at 400 V (40 °C)55 kW
Rated motor power at 230 V (40 °C)30 kW
Rated operational current at 40 °C196 A
Rated operational current at 50 °C175 A
Rated operational current at 60 °C154 A
Rated insulation voltage600 V
Minimum settable current (% of Ie)15 %; Relative to smallest settable Ie
Power loss during startup (50 °C)1 291 W
3RW5234-2AC05 — 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, 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 %
3RW5234-2AC05 — 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
3RW5234-2AC05 — 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
3RW5234-2AC05 — 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)
3RW5234-2AC05 — 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
3RW5234-2AC05 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

Current and voltage envelope

The 3RW5234-2AC05: Rated for a minimum motor current of 53 A across a supply voltage range of 200 to 600 V. This covers common low-voltage networks from 208 V to 575 V without a separate tap. Trip class is configurable: CLASS 10A (default), 10E, or 20E per IEC 60947-4-2. Class 10A is the standard for most pump and fan starts; switch to 20E for high-inertia loads that need a longer acceleration ramp.

Fieldbus and control integration

Supports PROFINET standard, EtherNet/IP, PROFIBUS, Modbus RTU, and Modbus TCP. The PROFINET interface also carries PROFIenergy for coordinated energy management during idle phases. Analog output is configurable as 4-20 mA (default) or 0-10 V — parameterizable via the High Feature HMI. Remote reset is available by cycling the 24 V control supply.

Mounting and environmental limits

Screw fixing on a vertical mounting surface; the unit can be rotated ±90° or tilted ±22.5° forward/back. Clearance requirements: 100 mm above, 75 mm below, 10 mm forward, 5 mm sideways, 0 mm backward. Pollution degree 3 per IEC 60947-4-2 — suitable for industrial environments with conductive dust or light moisture.

Approvals and compliance

Carries CE marking, UL approval, and CSA approval. These cover the major regulatory jurisdictions for industrial control panels in North America and Europe.

Frequently asked questions

What is the 3RW5234-2AC05 used for?

It is a SIRIUS soft starter for three-phase induction motors, providing controlled acceleration and deceleration (pump ramp down,) with selectable trip class (10A/10E/20E) per IEC 60947-4-2.

What fieldbus protocols does the 3RW5234-2AC05 support?

PROFINET standard, EtherNet/IP, PROFIBUS, Modbus RTU, and Modbus TCP. PROFINET also supports PROFIenergy.

MPN
3RW5234-2AC05