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Siemens 3RW5074-2AB05 — Soft Starters

Siemens 3RW5074-2AB05 Soft Starter, 135 A, 200-600 V, ATEX

MPN3RW5074-2AB05
Active

Siemens SIRIUS 3RW5074-2AB05 soft starter, 135 A min, 200-600 VAC, trip class 10A/10E/20E, ATEX, IECEx, PROFIBUS, Modbus RTU/TCP, EtherNet/IP, PROFINET.

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

Specifications

3RW5074-2AB05 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS
3RW5074-2AB05 — Power & Motor Rating
ParameterValue
Rated motor power at 400 V (40 °C)160 kW
Rated motor power at 230 V (40 °C)90 kW
Rated operational current at 40 °C315 A
Rated operational current at 50 °C279 A
Rated operational current at 60 °C255 A
Rated insulation voltage600 V
Minimum settable current (% of Ie)15 %; Relative to smallest settable Ie
Power loss during startup (50 °C)2 805 W
3RW5074-2AB05 — 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
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 %
3RW5074-2AB05 — 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
3RW5074-2AB05 — 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
3RW5074-2AB05 — 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)
3RW5074-2AB05 — 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
3RW5074-2AB05 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

The Siemens 3RW5074-2AB05 is a SIRIUS-series soft starter rated for a minimum motor current of 135 A at 200-600 VAC. The trip class is preset to CLASS 10A / 10E, with a selectable CLASS 20E option per IEC 60947-4-2. The unit carries ATEX and IECEx certification.

Fieldbus and control integration

This soft starter supports PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET with PROFIenergy — pick the protocol your PLC speaks and wire it directly; no gateway needed. The analog output defaults to 4-20 mA (parameterizable to 0-10 V via the High Feature HMI accessory), which lets you feed motor current or power to a DCS or SCADA without a separate transducer. Remote reset is handled by cycling the 24 VDC control supply off and on — useful if the starter trips overnight and you want an automated restart from the PLC sequence. The error logbook is only available with a special accessory (the High Feature HMI), so budget for that if you need fault history.

Mounting is screw-fix only — no DIN-rail clip on this frame size. The unit measures 160 mm wide by 230 mm tall by 282 mm deep, so plan for a backplate that clears the depth plus 100 mm upward and 75 mm downward clearance for ventilation. Side clearance is only 5 mm, so you can pack units tight in a row. Shock resistance is 15 g / 11 ms, with potential contact lifting above 12 g; fine for most industrial floors but not for direct mounting on a vibrating screen deck.

Frequently asked questions

Does 3RW5074-2AB05 support analog output and Modbus?

Yes, it has a parameterizable analog output (4-20 mA default, 0-10 V with High Feature HMI) and supports Modbus RTU and Modbus TCP natively.

What is the trip class of 3RW5074-2AB05?

The trip class is preset to CLASS 10A / 10E, with a selectable CLASS 20E option per IEC 60947-4-2.

Where can I buy 3RW5074-2AB05 available via RFQ confirmation?

This part is sourced to order; availability and pricing are confirmed at quote time. Contact our sales team for current lead time and RFQ.

MPN
3RW5074-2AB05