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Siemens 3RW5056-2TB15 — Soft Starters

Siemens 3RW5056-2TB15 Soft Starter, 81 A, 200-600 V, ATEX

MPN3RW5056-2TB15
Active

Siemens SIRIUS 3RW5056-2TB15 soft starter, 81 A minimum, 200-600 V, ATEX, IECEx, UL, CSA, trip class 10A/10E/20E, PROFIBUS, Modbus RTU/TCP, EtherNet/IP.

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

Specifications

3RW5056-2TB15 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS
3RW5056-2TB15 — Power & Motor Rating
ParameterValue
Rated motor power at 400 V (40 °C)90 kW
Rated motor power at 230 V (40 °C)45 kW
Rated operational current at 40 °C171 A
Rated operational current at 50 °C153 A
Rated operational current at 60 °C141 A
Rated insulation voltage600 V
Minimum settable current (% of Ie)15 %; Relative to smallest settable Ie
Power loss during startup (50 °C)1 478 W
3RW5056-2TB15 — 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 %
3RW5056-2TB15 — 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
3RW5056-2TB15 — Mechanical
ParameterValue
Height198 mm
Width120 mm
Depth249 mm
Weight5.2 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
3RW5056-2TB15 — 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)
3RW5056-2TB15 — 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
3RW5056-2TB15 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable130 ... 700 %
Starting Voltage [%]30 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

Fieldbus and integration note

The 3RW5056-2TB15: Communication options cover PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP, with PROFIenergy support available when paired with a PROFINET standard communication module. This makes it straightforward to integrate into most industrial Ethernet or fieldbus topologies without a separate gateway.

Trip class and motor protection

Trip class is selectable as CLASS 10A, CLASS 10E (preset), or CLASS 20E per IEC 60947-4-2. CLASS 10A suits standard induction motors with short acceleration times; CLASS 20E provides extended ramp time for high-inertia loads like centrifuges or large fans. The preset CLASS 10E is a common starting point for general-purpose motor starting. A minimum load setting of 15% relative to the smallest settable Ie prevents nuisance tripping on lightly loaded motors. Soft torque and voltage ramp functions are included, along with pump ramp down for controlled deceleration in fluid-handling applications.

Mounting is by screw fixing on a vertical surface, rotatable ±90° and tiltable ±22.5° front-to-back. Clearance requirements: 100 mm upwards, 75 mm downwards, 10 mm forwards, 5 mm at the sides, and 0 mm backwards — plan enclosure depth accordingly. Shock resistance is 15 g / 11 ms, dropping to 12 g / 11 ms with potential contact lifting. The 249 mm depth and 120 mm width fit standard 600 mm deep enclosures.

Frequently asked questions

Does 3RW5056-2TB15 support Modbus TCP?

Yes, it supports Modbus TCP, Modbus RTU, PROFIBUS, and EtherNet/IP. PROFIenergy is available when used with a PROFINET standard communication module.

Where can I buy 3RW5056-2TB15 available via RFQ confirmation?

This part is sourced and quoted to order against an RFQ. Availability and pricing are confirmed at quote time.

MPN
3RW5056-2TB15