Skip to main content
Log in
Siemens 3RW5072-6AB04 — Soft Starters

Siemens 3RW5072-6AB04 Soft Starter, 90 A, ATEX, 200-480 V

MPN3RW5072-6AB04
Active

Siemens SIRIUS 3RW5072-6AB04 soft starter, 90 A minimum, 200-480 V rated, ATEX, IECEx, Trip Class 10A/10E/20E, PROFIBUS, Modbus RTU/TCP, EtherNet/IP, PROFINET.

Siemens 3RW5072-6AB04 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RW5072-6AB04 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS
3RW5072-6AB04 — 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
3RW5072-6AB04 — 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, solid1x (0.5 ... 4.0 mm²), 2x (0.5 ... 2.5 mm²)
Control circuit wire range, finely stranded (with ferrule)1x (0.5 ... 2.5 mm²), 2x (0.5 ... 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.)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 %
3RW5072-6AB04 — 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
3RW5072-6AB04 — 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
3RW5072-6AB04 — 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)
3RW5072-6AB04 — 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
3RW5072-6AB04 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

Soft starter for motor starting in hazardous areas

The Siemens 3RW5072-6AB04 is a SIRIUS soft starter rated for a minimum operating current of 90 A and a rated supply voltage of 200 to 480 V. It carries ATEX and IECEx certification, meaning it is approved for installation in potentially explosive atmospheres — a key requirement for chemical, oil and gas, or grain-handling lines. The trip class is selectable between CLASS 10A, 10E (preset), and 20E per IEC 60947-4-2, which governs how quickly the unit can protect a motor during a stall or overload without nuisance tripping.

The unit measures 160 mm wide by 230 mm high by 282 mm deep. It mounts via screw fixing on a vertical surface, with the mounting surface rotatable ±90° and tiltable ±22.5° to the front and back. Clearance requirements: 100 mm upwards, 10 mm forwards, 75 mm downwards, 5 mm at the side, and 0 mm backwards — plan the enclosure layout accordingly.

Fieldbus and control integration

This soft starter supports PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET standard communication. It also supports PROFIenergy in connection with the PROFINET standard communication module. The analog output is configurable as 4 to 20 mA (default) or 0 to 10 V (parameterizable with High Feature HMI). Remote reset is achieved by turning off the control supply voltage (24 V DC).

Operating conditions and approvals

Shock resistance is 15 g / 11 ms, down to 12 g / 11 ms with potential contact lifting. Approvals include CE marking, UL approval, and CSA approval. The product category is hybrid switching devices.

Frequently asked questions

Does 3RW5072-6AB04 have ATEX certification?

Yes, ATEX certification is listed as Yes, along with IECEx certification.

Is 3RW5072-6AB04 compatible with Modbus RTU?

Yes, it supports Modbus RTU, as well as Modbus TCP, PROFIBUS, EtherNet/IP, and PROFINET standard.

What is the trip class of Siemens 3RW5072-6AB04?

The trip class is selectable between CLASS 10A, 10E (preset), and 20E, per IEC 60947-4-2.

MPN
3RW5072-6AB04