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Siemens 3RW5073-2TB14 — Soft Starters

Siemens 3RW5073-2TB14 Soft Starter, 200-480V, 100A Min, ATEX

MPN3RW5073-2TB14
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Siemens 3RW5073-2TB14 soft starter, 200-480 V rated, 100 A minimum, ATEX, IECEx, UL, CSA, CE, PROFIBUS, Modbus RTU/TCP, EtherNet/IP, screw fixing, 282 mm depth, 160 mm width, 230 mm height.

Siemens 3RW5073-2TB14 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RW5073-2TB14 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS
3RW5073-2TB14 — 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
3RW5073-2TB14 — 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 outputNo
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 %
3RW5073-2TB14 — Protection & Features
ParameterValue
Motor overload protectionYes; Full motor protection (thermistor motor protection and electronic motor overload protection)
Thermistor motor protectionYes; Type A PTC or Klixon / Thermoclick
Adjustable current limitationYes
Intrinsic device protectionYes
Pollution degree3, acc. to IEC 60947-4-2
3RW5073-2TB14 — 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
3RW5073-2TB14 — 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)
3RW5073-2TB14 — 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
3RW5073-2TB14 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

Rated voltage and current — what fits your motor

The 3RW5073-2TB14: Rated 200-480 V, this soft starter covers the common low-voltage motor range across 50/60 Hz supplies. The minimum settable current is 100 A, so the motor FLA must be at or above that floor — anything smaller and the overload protection won't set correctly. Trip class is preset to CLASS 10A / 10E, with CLASS 20E selectable per IEC 60947-4-2. CLASS 10 suits standard-start applications like pumps and fans; CLASS 20 gives more headroom for high-inertia loads such as centrifuges or crushers.

Fieldbus and control — wiring into the automation layer

PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP are all on the supported list — no separate gateway needed for most PLC environments. PROFIenergy is available when paired with the PROFINET communication module. Remote reset is handled by cycling the control supply voltage — useful for clearing a fault without a panel visit. Auto-reset is also configurable.

ATEX, IECEx, and approvals — compliance for hazardous areas

ATEX and IECEx certified, so this unit can be installed in Zone 1 or Zone 2 gas atmospheres and Zone 21 or Zone 22 dust atmospheres — the soft starter itself is not the ignition source.

Mounting and clearances — panel layout constraints

Screw fixing to a vertical mounting surface; the unit can be rotated ±90° or tilted ±22.5° front-to-back. Minimum clearances: 100 mm upwards, 75 mm downwards, 10 mm forwards, 0 mm backwards, 5 mm at the sides — plan the gland plate and busbar routing accordingly.

Operating temperature and derating

For a 50 °C panel ambient, expect to reduce the motor FLA setting by roughly 10-15% depending on load profile.

Frequently asked questions

How can I order the 3RW5073-2TB14 and check availability?

Submit an RFQ for current pricing and lead time — availability is confirmed at quote time.

What is the ATEX certification on the 3RW5073-2TB14?

ATEX and IECEx are both listed as Yes, meaning the unit is certified for use in potentially explosive atmospheres per the ATEX directive and IECEx scheme. This covers gas and dust groups typical in chemical, oil & gas, and mining applications.

What compliance documentation does Siemens provide for the 3RW5073-2TB14?

ATEX and IECEx certificates are also available. RoHS and REACH declarations are standard with Siemens industrial products — request these with your RFQ.

MPN
3RW5073-2TB14