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Siemens 3RW5077-2TB05 — Soft Starters

Siemens 3RW5077-2TB05 Soft Starter, 240 A

MPN3RW5077-2TB05
Active

Siemens SIRIUS 3RW5077-2TB05 soft starter, 240 A minimum, 200-600 VAC, Trip Class 10A/10E/20E per IEC 60947-4-2, ATEX/IECEx, PROFIBUS/Modbus/EtherNet/IP, 160x230x282 mm screw fixing.

StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

Identification

3RW5077-2TB05 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS

Power & Motor Rating

3RW5077-2TB05 — Power & Motor Rating
ParameterValue
Rated motor power at 400 V (40 °C)315 kW
Rated motor power at 230 V (40 °C)160 kW
Rated operational current at 40 °C570 A
Rated operational current at 50 °C504 A
Rated operational current at 60 °C460 A
Rated insulation voltage600 V
Minimum settable current (% of Ie)15 %; Relative to smallest settable Ie
Power loss during startup (50 °C)5 801 W

Control & Connection

3RW5077-2TB05 — 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 outputNo
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 %

Protection & Features

3RW5077-2TB05 — 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

Mechanical

3RW5077-2TB05 — 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

Environmental

3RW5077-2TB05 — 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)

Specifications

3RW5077-2TB05 — 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

Electrical

3RW5077-2TB05 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

Trip Class and Motor Protection Profile

The 3RW5077-2TB05 is a SIRIUS soft starter rated for a minimum set current of 240 A, with a rated operating voltage of 200 to 600 VAC. Its trip class is configurable as CLASS 10A, CLASS 10E (preset), or CLASS 20E, per IEC 60947-4-2.

Fieldbus and Communication Options

This unit supports PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET standard with PROFIenergy. The PROFIenergy function, available in conjunction with the PROFINET communication module, allows the soft starter to be placed into an energy-saving idle state during production pauses — useful on automated lines where the motor does not need to be ready to start between cycles. No analog output is fitted; torque control is not available on this variant.

Mounting, Environment, and Certifications

Screw-fixed, 160 mm wide, 230 mm high, 282 mm deep. Clearances: 100 mm up, 75 mm down, 10 mm forward, 0 mm back, 5 mm sides.

Frequently asked questions

What is the trip class of 3RW5077-2TB05?

The trip class is configurable as CLASS 10A, CLASS 10E (preset), or CLASS 20E, per IEC 60947-4-2. The 10E preset is the factory default.

Does 3RW5077-2TB05 support Modbus TCP communication?

Yes, it supports Modbus TCP, along with Modbus RTU, PROFIBUS, EtherNet/IP, and PROFINET standard with PROFIenergy.

Where can I buy 3RW5077-2TB05 soft starter?

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

MPN
3RW5077-2TB05