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Siemens 3RW5547-6HF14 — Soft Starters

Siemens 3RW5547-6HF14 Soft Starter, 200-480V, ATEX, PROFIBUS

MPN3RW5547-6HF14
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Siemens SIRIUS 3RW5547-6HF14 soft starter, 200-480 V rated, ATEX/IECEx certified, PROFIBUS onboard, trip class 10A/10E default, 393 x 210 x 203 mm.

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

Specifications

3RW5547-6HF14 — Identification
ParameterValue
Product designationFailsafe soft starters
Product brand nameSIRIUS
3RW5547-6HF14 — Power & Motor Rating
ParameterValue
Rated motor power at 400 V (40 °C)250 kW
Rated motor power at 230 V (40 °C)132 kW
Rated operational current at 40 °C814 A
Rated operational current at 50 °C721 A
Rated operational current at 60 °C658 A
Rated insulation voltage480 V
Minimum settable current (% of Ie)10 %; Relative to set Ie
Power loss during startup (50 °C)6 400 W
3RW5547-6HF14 — Control & Connection
ParameterValue
Control supply voltage typeAC
Main circuit terminal typebusbar connection
Control circuit wire range, solid1x (0.5 ... 4.0 mm²), 2x (0.5 ... 2.5 mm²)
Control circuit wire range, finely stranded (with ferrule)1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)
Analog outputYes; 4 ... 20 mA (default) / 0 ... 10 V
Auxiliary contact rated current, AC-15 at 250 V3 A
Auxiliary contact rating (UL)R300-B300
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 %
Operating voltage tolerance, inside-delta (max.)10 %
Operating voltage tolerance, inside-delta (min.)-15 %
3RW5547-6HF14 — Protection & Features
ParameterValue
Motor overload protectionYes; Full motor protection (thermistor motor protection and electronic motor overload protection) / When using the motor overload protection according to ATEX, an upstream contactor is required in inside-delta circuit.
Thermistor motor protectionYes; Type A PTC or Klixon / Thermoclick
Adjustable current limitationYes
Inside-delta connectionYes
Intrinsic device protectionYes
Pollution degree3, acc. to IEC 60947-4-2
3RW5547-6HF14 — Mechanical
ParameterValue
Height393 mm
Width210 mm
Depth203 mm
Weight10.9 kg
Mounting positionVertical (can be rotated +/- 90° and tilted forward or backward +/- 22.5°)
Fastening methodscrew fixing
Mounting clearance, top100 mm
Mounting clearance, bottom75 mm
Mounting clearance, side5 mm
Mounting clearance, front10 mm
3RW5547-6HF14 — 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 altitude2 000 m; Derating as of 1000 m, see catalog
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)
3RW5547-6HF14 — Specifications
ParameterValue
Trip ClassCLASS 10A / 10E (default) / 20E / 30E; acc. to IEC 60947-4-2
Number Of Controlled Phases3
Utilization category according to IEC 60947-4-2AC 53a
Product Feature Integrated Bypass Contact SystemYes
Start-Up Ramp Time Of Soft Starter0 ... 360 s
Ramp-Down Time Of Soft Starter0 ... 360 s
3RW5547-6HF14 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable125 ... 800 %
Starting Voltage [%]20 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

What the 3RW5547-6HF14 brings to a motor control center

The Siemens 3RW5547-6HF14 is a SIRIUS soft starter rated for 200... 480 V, with a default trip class of CLASS 10A / 10E per IEC 60947-4-2, meaning it handles standard motor starts without nuisance tripping while protecting against overloads. ATEX and IECEx certification (Yes) qualifies it for hazardous-area installations — Zone 1/21 or Zone 2/22 depending on the system design. The control supply accepts 110... 250 V at both 50 Hz and 60 Hz, so a single unit covers 50/60 Hz plants without a transformer swap. PROFIBUS is built in (Yes), alongside Modbus RTU, Modbus TCP, and EtherNet/IP, giving the integrator fieldbus flexibility without an extra communication module. The analog output defaults to 4... 20 mA or 0... 10 V, useful for feeding motor current or torque data to a PLC or drive controller.

The enclosure measures 393 mm height, 210 mm width, and 203 mm depth. Clearance requirements: 100 mm upward, 75 mm downward, 10 mm forward, 5 mm at the side, and 0 mm backward — so the back can sit flush against the panel backplate. Screw terminals (Yes) simplify wiring for panel builders who prefer traditional terminations over spring-cage.

Protection and control features

Trip class is selectable: CLASS 10A / 10E (default), 20E, or 30E, matching the motor start profile. The service factor of 1.15 allows continuous overload up to 115% of rated current — common for pump and fan applications where occasional overloading is expected. DC braking, voltage ramp, pump ramp down, torque control, and breakaway pulse are all included, covering soft start/stop for centrifugal loads and high-inertia starts. Accuracy Class 5 per IEC 61557-12 applies to the integrated metering, adequate for energy monitoring and trend analysis without a separate power meter. The event list, error logbook, and trace function aid commissioning and troubleshooting — useful when a line-down event needs root-cause logging.

The 3RW5547-6HF14 carries CE, UL, and CSA approvals, so it ships into North American and European panels without additional certification paperwork. The B10d value of 648 000 cycles (mechanical endurance) gives a reliability baseline for safety-related applications.

Frequently asked questions

Does the 3RW5547-6HF14 support PROFIBUS?

Yes, PROFIBUS is built in (Yes) — no separate communication module needed. It also supports Modbus RTU, Modbus TCP, and EtherNet/IP for multi-protocol flexibility.

What is the price of the Siemens 3RW5547-6HF14 soft starter?

Pricing is confirmed at quote time against an RFQ. Submit a request for current pricing — the unit is sourced through independent distribution channels.

MPN
3RW5547-6HF14