Skip to main content
Log in
Siemens 3RW5073-6AB04 — Soft Starters

Siemens 3RW5073-6AB04 Soft Starter, ATEX/UKEX/IECEx

MPN3RW5073-6AB04
Active

Siemens SIRIUS 3RW5073-6AB04 soft starter, ATEX/UKEX/IECEx certified, 200-480 V, 100 A minimum, trip class 10A/10E/20E, multi-protocol communications.

Siemens 3RW5073-6AB04 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RW5073-6AB04 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS
3RW5073-6AB04 — Power & Motor Rating
ParameterValue
Rated motor power at 400 V (40 °C)132 kW
Rated motor power at 230 V (40 °C)75 kW
Rated operational current at 40 °C250 A
Rated operational current at 50 °C220 A
Rated operational current at 60 °C200 A
Rated insulation voltage600 V
Minimum settable current (% of Ie)15 %; Relative to smallest settable Ie
Power loss during startup (50 °C)2 043 W
3RW5073-6AB04 — 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 %
3RW5073-6AB04 — 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
3RW5073-6AB04 — 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
3RW5073-6AB04 — 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)
3RW5073-6AB04 — 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
3RW5073-6AB04 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

What this soft starter brings to a line

The Siemens 3RW5073-6AB04 is a SIRIUS soft starter rated for 200 to 480 V and a minimum setting of 100 A. It ships with trip class 10A / 10E (preset) / 20E per IEC 60947-4-2, so it matches standard motor start profiles — 10A for normal starts, 10E for extended ramp, 20E for heavy inertia loads like crushers or centrifuges. The unit carries ATEX, UKEX, and IECEx certification, meaning it is approved for installation in explosive atmospheres (gas/dust zones) where a standard soft starter would be a safety violation. That certification alone sets it apart from the bulk of the SIRIUS catalog.

Fieldbus and control integration

This soft starter supports PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET standard — five protocols on one device. That means it drops into a Siemens PLC environment over PROFINET or PROFIBUS, but also into Rockwell or third-party networks via EtherNet/IP or Modbus TCP without a gateway. The control supply voltage is not listed here, but the remote reset function is confirmed: cycling the control supply off/on resets the unit. The analog output is configurable as 4-20 mA or 0-10 V, which feeds motor current or load status to a PLC analog input or local meter.

Screw fixing is the fastening method — no DIN-rail clip on this frame. The dimensions are 160 mm wide, 230 mm high, 282 mm deep. Mounting position is flexible: vertical surface, ±90° rotatable, and ±22.5° tiltable forward/back. Shock resistance is rated at 15 g / 11 ms. That is enough for most industrial panels but worth checking if the enclosure is near a press or drop-forge.

Frequently asked questions

What is the trip class of the 3RW5073-6AB04?

The trip class is CLASS 10A / 10E (preset) / 20E per IEC 60947-4-2, covering standard, extended, and heavy-duty start profiles.

Is the 3RW5073-6AB04 suitable for hazardous locations (ATEX)?

Yes, it carries ATEX, UKEX, and IECEx certification, making it approved for installation in explosive atmospheres.

What communication protocols does the 3RW5073-6AB04 support?

It supports PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET standard — five protocols on one device.

MPN
3RW5073-6AB04