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Siemens 3RW4047-2TB05 — Soft Starters

Siemens 3RW4047-2TB05 SIRIUS Soft Starter, 106 A at 40 °C

MPN3RW4047-2TB05
Active

Siemens SIRIUS 3RW4047-2TB05 soft starter, size S3, 106 A at 40 °C, 50-60 Hz, screw and snap-on DIN rail mounting, adjustable current limitation, integrated motor overload protection.

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

Identification

3RW4047-2TB05 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS

Power & Motor Rating

3RW4047-2TB05 — Power & Motor Rating
ParameterValue
Rated operational current at 40 °C106A
Rated operational current at 50 °C98A
Rated operational current at 60 °C90A
Rated insulation voltage600V
Minimum settable current (% of Ie)20%

Control & Connection

3RW4047-2TB05 — Control & Connection
ParameterValue
Control supply voltage typeAC/DC
Rated voltage at 50 Hz24V
Rated voltage at 60 Hz24V
Main circuit terminal typescrew-type terminals
Auxiliary contact rating (UL)B300 / R300
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%

Protection & Features

3RW4047-2TB05 — Protection & Features
ParameterValue
Motor overload protectionYes
Thermistor motor protectionYes
Adjustable current limitationYes
Inside-delta connectionNo
Intrinsic device protectionYes
Pollution degree3, acc. to IEC 60947-4-2

Mechanical

3RW4047-2TB05 — Mechanical
ParameterValue
Height170mm
Width70mm
Depth190mm
Mounting positionWith additional fan: With vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back Without additional fan: With vertical mounting surface +/-10° rotatable, with vertical mounting surface +/- 10° t
Fastening methodscrew and snap-on mounting
Mounting clearance, top60mm
Mounting clearance, bottom40mm
Mounting clearance, side30mm

Environmental

3RW4047-2TB05 — Environmental
ParameterValue
Operating temperature range-25 ... +60°C
Ambient class during operation (IEC 60721)3K6 (no formation of ice, no 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)

Product details

106 A at 40 °C — derating and ambient limits

The 3RW4047-2TB05: This derating profile means the continuous motor current must be checked against the enclosure ambient temperature — a panel running at 50 °C derates the unit by about 8 %.

Screw terminals and wire ranges

Main circuit connections use screw-type terminals accepting 2x (7... 1/0) AWG or 2x (10... 70 mm²) stranded. The clamping system accommodates both front and back entry, with a maximum motor cable length of 300 m.

Mounting and clearance

Fastening method is screw and snap-on mounting to DIN rail. Dimensions: 70 mm wide, 170 mm high, 190 mm deep. Clearance requirements: 60 mm upwards, 40 mm downwards, 30 mm at the side. With additional fan, the unit can be rotated ±90° on a vertical surface and tilted ±22.5° front/back; without fan, rotation and tilt are limited to ±10°.

Protection and control features

Integrated motor overload protection and intrinsic device protection are standard. Adjustable current limitation allows setting the starting current between 20 % and 100 % of the rated motor current. External reset is supported. Pollution degree 3 per IEC 60947-4-2 suits industrial environments with conductive contamination.

Frequently asked questions

What is the rated current of 3RW4047-2TB05 at 40 °C?

This is the continuous motor current capacity for the SIRIUS S3 frame size.

MPN
3RW4047-2TB05