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Siemens 3RW5552-6HA14 — Soft Starters

Siemens 3RW5552-6HA14 Soft Starter, 200-480 V, ATEX, Active

MPN3RW5552-6HA14
Active

Siemens 3RW5552-6HA14 soft starter, 200-480 V, trip class 10A/10E/20E/30E, ATEX/IECEx, PROFIBUS/Modbus/EtherNet/IP, 241×478×764 mm.

Siemens 3RW5552-6HA14 datasheet (PDF)
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Lead time3-5 Days wk
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

Identification

3RW5552-6HA14 — Identification
ParameterValue
Product designationSoft starter
Product brand nameSIRIUS

Power & Motor Rating

3RW5552-6HA14 — Power & Motor Rating
ParameterValue
Rated motor power at 400 V (40 °C)355 kW
Rated motor power at 230 V (40 °C)200 kW
Rated operational current at 40 °C1 091 A
Rated operational current at 50 °C972 A
Rated operational current at 60 °C883 A
Rated insulation voltage480 V
Minimum settable current (% of Ie)10 %; Relative to set Ie
Power loss during startup (50 °C)8 115 W

Control & Connection

3RW5552-6HA14 — 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 %

Protection & Features

3RW5552-6HA14 — 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

Mechanical

3RW5552-6HA14 — Mechanical
ParameterValue
Height764 mm
Width478 mm
Depth241 mm
Weight45 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

Environmental

3RW5552-6HA14 — 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 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)

Specifications

3RW5552-6HA14 — 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

Electrical

3RW5552-6HA14 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable125 ... 800 %
Starting Voltage [%]20 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

Motor protection and trip class selection

The 3RW5552-6HA14 offers selectable trip classes — CLASS 10A / 10E (default) / 20E / 30E — per IEC 60947-4-2, letting you match the thermal overload curve to the motor start profile. CLASS 10A is the tightest, suitable for normal starts;. Rated voltage is 200-480 V, covering standard low-voltage three-phase supplies across 50/60 Hz installations.

Fieldbus and control integration

Built-in support for PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP means this unit drops into most common industrial networks without an extra gateway. PROFINET with PROFIenergy is available via optional communication modules. Analog output configurable as 4-20 mA or 0-10 V for feeding motor current or torque to a PLC or panel meter. The accuracy class is 5 per IEC 61557-12, sufficient for monitoring and trending.

Advanced motor control functions

Includes voltage ramp start, pump ramp down (to reduce water hammer), torque control, breakaway pulse for sticky loads, and DC braking. These are parameterizable via the onboard interface or fieldbus. Service factor 1.15 allows continuous overload above nameplate rating — useful when the motor is oversized for the load. The unit also logs events and errors in a logbook, with a trace function for diagnosing start-up issues.

ATEX and hazardous area compliance

ATEX and IECEx certified (both marked Yes), meaning the soft starter is approved for use in explosive atmospheres — typically Zone 2 or Zone 22, depending on the installation. This is a key differentiator for chemical, oil/gas, and grain-handling applications. UL and CSA approvals are also present, covering North American installations. CE marking confirms conformity with EU directives.

Physical footprint and panel layout

Dimensions: 764 mm high, 478 mm wide, 241 mm deep — a substantial enclosure that needs a dedicated backplate or floor-mount. Clearance requirements: 100 mm above, 75 mm below, 10 mm in front, 5 mm at the sides, and 0 mm behind (panel-mount). Termination is via screw terminals — no special tooling needed for wiring. The unit supports firmware updates in the field, so you can apply later software revisions without swapping hardware.

Frequently asked questions

What is the ATEX certification for 3RW5552-6HA14?

The unit carries ATEX and IECEx certification (both marked Yes), permitting installation in explosive atmospheres. This is a factory-specified approval, not a field retrofit.

What trip classes are available on this soft starter?

Selectable trip classes: CLASS 10A, CLASS 10E (default), CLASS 20E, and CLASS 30E, per IEC 60947-4-2. CLASS 10A is the tightest for normal starts; CLASS 30E allows longer acceleration for high-inertia loads.

What compliance documentation does Siemens provide for 3RW5552-6HA14?

The unit carries CE marking, UL approval, CSA approval, ATEX, and IECEx certification. These cover EU, North American, and hazardous-area regulatory requirements. RoHS and REACH declarations are typically included in the manufacturer's documentation package.

What fieldbus protocols does this soft starter support?

Built-in support for PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP. PROFINET with PROFIenergy is available via optional communication modules.

MPN
3RW5552-6HA14