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Siemens 3RW5543-2HF04 — Soft Starters

Siemens 3RW5543-2HF04 Soft Starter, 200-480V, ATEX

MPN3RW5543-2HF04
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Siemens SIRIUS 3RW5543-2HF04 soft starter, 200-480 V rated, ATEX / IECEx, fail-safe, multi-fieldbus.

Siemens 3RW5543-2HF04 datasheet (PDF)
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Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

Identification

3RW5543-2HF04 — Identification
ParameterValue
Product designationFailsafe soft starters
Product brand nameSIRIUS

Power & Motor Rating

3RW5543-2HF04 — Power & Motor Rating
ParameterValue
Rated motor power at 400 V (40 °C)110 kW
Rated motor power at 230 V (40 °C)55 kW
Rated operational current at 40 °C364 A
Rated operational current at 50 °C322 A
Rated operational current at 60 °C294 A
Rated insulation voltage480 V
Minimum settable current (% of Ie)10 %; Relative to set Ie
Power loss during startup (50 °C)2 967 W

Control & Connection

3RW5543-2HF04 — Control & Connection
ParameterValue
Control supply voltage typeAC/DC
Rated voltage at 50 Hz24 V
Rated voltage at 60 Hz24 V
Main circuit terminal typebusbar connection
Control circuit wire range, solid2x (0.25 ... 1.5 mm²)
Control circuit wire range, finely stranded (with ferrule)2x (0.25 ... 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.)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 %
Operating voltage tolerance, inside-delta (max.)10 %
Operating voltage tolerance, inside-delta (min.)-15 %

Protection & Features

3RW5543-2HF04 — 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

3RW5543-2HF04 — Mechanical
ParameterValue
Height393 mm
Width210 mm
Depth203 mm
Weight10.2 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

3RW5543-2HF04 — 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)

Specifications

3RW5543-2HF04 — 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

3RW5543-2HF04 — Electrical
ParameterValue
Current Limiting Value [%] Adjustable125 ... 800 %
Starting Voltage [%]20 ... 100 %
Stopping Voltage [%]50 %; non-adjustable

Product details

What this 3RW5543-2HF04 brings to the panel

The Siemens 3RW5543-2HF04 is a SIRIUS soft starter rated 200-480 V, carrying ATEX and IECEx certification for explosive atmospheres — that is the headline for anyone sourcing into a Zone-classified line. It ships with one fail-safe output (safe state: open load circuit), meaning it can be wired directly into a safety circuit without an external safety relay for the stop function. Trip class is configurable CLASS 10A / 10E (default) / 20E / 30E per IEC 60947-4-2, so you match the motor start profile without swapping hardware.

Fieldbus and control flexibility

This unit supports PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP natively — no separate communication module needed for most networks. The analog output is jumper-configurable 4-20 mA or 0-10 V, covering both current-loop and voltage-input PLC cards. Control voltage is not explicitly listed in the spec, but the unit accepts a wide 200-480 V power supply; auxiliary control wiring typically follows the SIRIUS 24 VDC standard for the electronics — verify the specific control module if your system runs 24 VDC logic.

Dimensions: 210 mm wide, 393 mm tall, 203 mm deep. Requires 100 mm clearance upward, 75 mm downward, 10 mm forward, 0 mm backward. Side clearance is 5 mm.

Frequently asked questions

Is the 3RW5543-2HF04 a fail-safe soft starter and what does that mean?

Yes, it has one fail-safe output (safe state: open load circuit). That means when the safety circuit is triggered, the output opens and the soft starter stops the motor without relying on an external safety relay for the stop function — useful for SIL/PL-rated machine guarding.

Does 3RW5543-2HF04 support Modbus TCP or PROFIBUS communication?

Yes, it supports PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP natively — no separate communication module required for those protocols.

What is 3RW5543-2HF04's ATEX certification?

The listing shows ATEX Yes and IECEx Yes, meaning it is certified for use in explosive atmospheres (gas/dust) per those directives. This is the primary differentiator from standard soft starters.

Where can I buy the Siemens 3RW5543-2HF04 soft starter?

This part is sourced to order; availability and pricing are confirmed at quote time. Contact our sales team for a current RFQ.

MPN
3RW5543-2HF04