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Siemens 3RW4047-2BB05 — Soft Starters

Siemens 3RW4047-2BB05 Soft Starter, 106 A, SIRIUS S3

MPN3RW4047-2BB05
Active

Siemens SIRIUS 3RW4047-2BB05 soft starter, S3 frame, 106 A at 40 °C, 50/60 Hz, screw-type terminals, screw and snap-on mounting.

$916.94Ref. price · indicative, final on quote
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

3RW4047-2BB05 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS

Power & Motor Rating

3RW4047-2BB05 — 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

3RW4047-2BB05 — 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.)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

3RW4047-2BB05 — Protection & Features
ParameterValue
Motor overload protectionYes
Thermistor motor protectionNo
Adjustable current limitationYes
Inside-delta connectionNo
Intrinsic device protectionYes
Pollution degree3, acc. to IEC 60947-4-2

Mechanical

3RW4047-2BB05 — 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

3RW4047-2BB05 — 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 — thermal derating drives the panel layout

The 3RW4047-2BB05: That derating curve means the enclosure ambient temperature directly sets the usable motor current — if the cabinet runs at 50 °C, you lose 8 A of headroom. Integrated motor overload protection and adjustable current limitation are built in, so no separate overload relay is needed for most installations. The minimum load is 20 % of the rated current, which covers lightly loaded conveyors or pumps. Pollution degree 3 per IEC 60947-4-2 confirms it is rated for the conductive dust and humidity typical of industrial control panels without additional conformal coating.

Mounting and wiring — screw terminals, DIN or panel

Fastening method is screw and snap-on mounting — it clips onto a DIN rail or bolts directly to a backplate. Dimensions are 70 mm wide, 170 mm high, 190 mm deep, so it fits a standard S3 footprint. Main circuit terminals accept 2x (7 … 1/0) AWG screw-type lugs. Auxiliary contacts take 2x (24 … 14) AWG. The control supply is 24 V at 50/60 Hz — common for PLC-driven panels. Clearance requirements: 60 mm above, 40 mm below, 30 mm at the sides for airflow. Without an additional fan, the mounting surface must be vertical with ±10° rotation and ±10° tilt. With the optional fan, rotation tolerance opens to ±90° and tilt to ±22.5°.

Active production — no obsolescence risk

Lifecycle status is current production.

Frequently asked questions

What compliance documentation does Siemens provide for 3RW4047-2BB05?

The soft starter is rated pollution degree 3 per IEC 60947-4-2, which covers industrial environments. Standard Siemens documentation includes the product datasheet and declaration of conformity for CE/UKCA; specific RoHS/REACH/UL documentation should be requested at RFQ time.

MPN
3RW4047-2BB05