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Siemens 3RW5072-2AB15 — Soft Starters

Siemens 3RW5072-2AB15 Soft Starter, 200-600 V, ATEX

MPN3RW5072-2AB15
Active

Siemens 3RW5072-2AB15 soft starter, 200-600 VAC, 90 A minimum setting, Class 10A/10E/20E, ATEX/UKEX/IECEx, PROFIBUS/Modbus/EtherNet/IP, screw fixing, 160 x 230 x 282 mm.

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

Specifications

3RW5072-2AB15 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS
3RW5072-2AB15 — Power & Motor Rating
ParameterValue
Rated motor power at 400 V (40 °C)110 kW
Rated motor power at 230 V (40 °C)55 kW
Rated operational current at 40 °C210 A
Rated operational current at 50 °C186 A
Rated operational current at 60 °C170 A
Rated insulation voltage600 V
Minimum settable current (% of Ie)15 %; Relative to smallest settable Ie
Power loss during startup (50 °C)1 867 W
3RW5072-2AB15 — 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
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 %
3RW5072-2AB15 — Protection & Features
ParameterValue
Motor overload protectionYes; Electronic motor overload protection
Thermistor motor protectionNo
Adjustable current limitationYes
Intrinsic device protectionYes
Pollution degree3, acc. to IEC 60947-4-2
3RW5072-2AB15 — Mechanical
ParameterValue
Height230 mm
Width160 mm
Depth282 mm
Weight7.3 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
3RW5072-2AB15 — 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 Manual
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)
3RW5072-2AB15 — Specifications
ParameterValue
Trip ClassCLASS 10A / 10E (preset) / 20E; acc. to IEC 60947-4-2
Number Of Controlled Phases2
Utilization category according to IEC 60947-4-2AC-53a
Product Feature Integrated Bypass Contact SystemYes
Start-Up Ramp Time Of Soft Starter0 ... 20 s
Ramp-Down Time Of Soft Starter0 ... 20 s
3RW5072-2AB15 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

Active production and hazardous-area approvals

The 3RW5072-2AB15: CE and UL/CSA approvals are also present, covering European and North American regulatory jurisdictions.

Rated 200 to 600 V, covering the common 208 V, 400 V, and 480 V industrial line voltages without a separate tap or transformer. The minimum settable motor current is 90 A, with a minimum load of 15 % relative to the smallest settable Ie — so it will not drop a lightly loaded motor into a hard start. Trip class is selectable between Class 10A (preset), 10E, and 20E per IEC 60947-4-2. Class 10A clears the start within 10 seconds at 7× Ie — this is the standard for most pump and fan starts.

Fieldbus connectivity and soft-start algorithms

Onboard PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP mean the starter talks directly to the PLC without an external gateway — the commissioning engineer maps the control word and status word into the drive profile, not a generic Modbus map. PROFIenergy is supported when used with the PROFINET communication module. Soft Torque, Voltage Ramp, and Pump Ramp Down are built in — no option card needed. The analog output defaults to 4-20 mA but can be parameterised to 0-10 V via the High Feature HMI. Auto-reset and remote reset (by cycling control supply voltage) are standard.

Mounting and thermal derating

Screw fixing to the back panel, not DIN rail — the 160 mm width × 230 mm height × 282 mm depth requires a dedicated mounting footprint. Clearance requirements: 100 mm upwards, 75 mm downwards, 10 mm forwards, 5 mm at the sides, 0 mm backwards — the minimum side gap is tight, but the top and bottom gaps must be respected for convection airflow. Shock resistance is 15 g / 11 ms, dropping to 12 g / 11 ms if contact lifting is a concern.

Frequently asked questions

What does the ATEX approval on 3RW5072-2AB15 mean in practice?

ATEX, UKEX, and IECEx certification are all present on this soft starter. This means it is listed for installation in potentially explosive atmospheres (gas or dust) without requiring an additional external barrier — the starter itself meets the ignition protection requirements. The approvals appear on the nameplate.

What trip classes does 3RW5072-2AB15 support?

It supports Class 10A (preset at factory), Class 10E, and Class 20E per IEC 60947-4-2. Class 10A clears the start within 10 seconds at 7× Ie — suitable for pumps and fans.

What fieldbuses are built into 3RW5072-2AB15?

Onboard PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP are standard — no external gateway needed. PROFIenergy is supported when used with the PROFINET communication module.

What are the clearance requirements for mounting 3RW5072-2AB15?

Screw fixing to the back panel. Clearances: 100 mm upwards, 75 mm downwards, 10 mm forwards, 5 mm at the sides, 0 mm backwards. The top and bottom gaps must be maintained for convection cooling.

MPN
3RW5072-2AB15