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Siemens 3RW3047-2BB14 — Soft Starters

Siemens 3RW3047-2BB14 SIRIUS Soft Starter, 106 A, Size S3

MPN3RW3047-2BB14
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Siemens SIRIUS 3RW3047-2BB14 soft starter, Size S3, 106 A at 40 °C, 110-230 VDC control supply, screw terminals, 50/60 Hz.

$701.04Ref. price · indicative, final on quote
Siemens 3RW3047-2BB14 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RW3047-2BB14 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS
3RW3047-2BB14 — 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)10%
3RW3047-2BB14 — Control & Connection
ParameterValue
Control supply voltage typeAC/DC
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%
3RW3047-2BB14 — Protection & Features
ParameterValue
Motor overload protectionNo
Thermistor motor protectionNo
Adjustable current limitationNo
Inside-delta connectionNo
Intrinsic device protectionNo
Pollution degree3, acc. to IEC 60947-4-2
3RW3047-2BB14 — Mechanical
ParameterValue
Height170mm
Width70mm
Depth190mm
Mounting positionWith vertical mounting surface +/-10° rotatable, with vertical mounting surface +/- 10° tiltable to the front and back
Fastening methodscrew and snap-on mounting
Mounting clearance, top60mm
Mounting clearance, bottom40mm
Mounting clearance, side30mm
3RW3047-2BB14 — 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

Rated current and thermal derating profile

The 3RW3047-2BB14: The derating temperature threshold is 40 °C, so the full 106 A is only available below that ambient — above 40 °C the continuous current drops linearly. For a 45 °C panel ambient, budget around 102 A; at 55 °C, expect roughly 94 A. This matters for sizing the bypass contactor and upstream protection.

Control supply and wiring constraints

Control supply is 110-230 VDC — a single DC rail covers the range, so no tap-changing or AC/DC confusion. Auxiliary contacts take 2x (24... 14) AWG. Maximum motor cable length is 300 m; beyond that, reflected-wave voltage spikes at the motor terminals may exceed the winding insulation rating, especially on 480 V systems.

Mounting, clearance, and environment

Size S3 footprint: 170 mm high, 70 mm wide, 190 mm deep. Fastening is screw or snap-on onto DIN rail. Clearance requirements: 60 mm above, 40 mm below, 30 mm at the sides. Mounting position allows ±10° rotation and ±10° tilt from vertical — useful for angled panel layouts. Operating ambient -25 to +60 °C; storage -40 to +80 °C.

Frequently asked questions

What is the rated current of the 3RW3047-2BB14 at different ambient temperatures?

The derating starts above 40 °C ambient.

What control supply voltage does the 3RW3047-2BB14 require?

110-230 VDC. It accepts the full range without configuration changes.

How is the 3RW3047-2BB14 quoted for volume purchases?

Sourced through authorized distribution against an RFQ. Submit target quantity and delivery window for current pricing and lead time confirmation.

MPN
3RW3047-2BB14