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Siemens 3RW5234-2AC14 — Soft Starters

Siemens 3RW5234-2AC14 SIRIUS Soft Starter, 53 A, 200-480 V

MPN3RW5234-2AC14
Active

Siemens SIRIUS 3RW5234-2AC14 soft starter, 53 A minimum, 200-480 V rated, Trip Class 10A/10E/20E, PROFIBUS/Modbus/EtherNet/IP/PROFINET, 203x185x306 mm.

Siemens 3RW5234-2AC14 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RW5234-2AC14 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS
3RW5234-2AC14 — 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
3RW5234-2AC14 — Control & Connection
ParameterValue
Control supply voltage typeAC
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.)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 %
Operating voltage tolerance, inside-delta (max.)10 %
Operating voltage tolerance, inside-delta (min.)-15 %
3RW5234-2AC14 — 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
3RW5234-2AC14 — 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
3RW5234-2AC14 — 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)
3RW5234-2AC14 — 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
3RW5234-2AC14 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

Trip class and motor protection — what 10A/10E/20E means for your start profile

The 3RW5234-2AC14 is configured with Trip Class 10A as default, with selectable 10E and 20E options per IEC 60947-4-2. If you're coordinating with upstream motor protection, match the trip class to the motor's thermal damage curve. A pump with a soft start profile rarely needs more than Class 10A; a crusher or conveyor with long acceleration time may need Class 20E to avoid a trip before the motor reaches full speed.

Fieldbus lineup — PROFIBUS, Modbus, EtherNet/IP, PROFINET

This soft starter natively supports PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET — no separate gateway module needed for any of these. That means you can drop it into a Siemens S7-1500 environment on PROFINET, or into a Rockwell CompactLogix rack on EtherNet/IP, and the I/O mapping is handled through the standard GSDML or EDS file. PROFIenergy is available when used with the PROFINET communication module — useful for energy management in automated lines where the soft starter needs to report power consumption during idle phases.

Panel fit — dimensions and mounting clearances

The 3RW5234-2AC14 measures 203 mm deep, 185 mm wide, and 306 mm high — screw fixing to the mounting plate, not DIN rail. Clearance requirements: 100 mm above, 75 mm below, 10 mm in front, 5 mm at the sides, and 0 mm behind. That 100 mm upward gap is non-negotiable for airflow — the soft starter's thyristor stack needs that space to dissipate heat, especially if you're running near the 53 A minimum. The shock resistance is 15 g for 11 ms, dropping to 12 g if contact lifting is a concern.

Active production and sourcing posture

CE, UL, and CSA approvals are on file — the UL mark covers the US market, CSA covers Canada, and CE covers the EU.

Frequently asked questions

What compliance documentation does Siemens provide for 3RW5234-2AC14?

CE marking, UL approval, and CSA approval are confirmed on the product record. These cover the EU, US, and Canadian regulatory requirements respectively.

What is the closest alternative to 3RW5234-2AC14 in the SIRIUS soft starter family?

The 3RW5234 series includes multiple voltage and current variants; the closest functional match would share the same frame size and trip class options but differ in rated voltage range or minimum current setting. Confirm the BOM's voltage and current requirements before selecting an alternate.

MPN
3RW5234-2AC14