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Siemens 3RW5524-1HF04 Soft Starter, ATEX, 200-480 V

MPN3RW5524-1HF04

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Siemens SIRIUS 3RW5524-1HF04 soft starter, ATEX/IECEx certified, rated 200-480 V, fail-safe output, trip class 10A/10E/20E/30E, with Modbus RTU/TCP, PROFIBUS, and EtherNet/IP.

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

Specifications

3RW5524-1HF04 — Identification
Parameter	Value
Product designation	Failsafe soft starters
Product brand name	SIRIUS

3RW5524-1HF04 — Power & Motor Rating
Parameter	Value
Rated motor power at 400 V (40 °C)	22 kW
Rated motor power at 230 V (40 °C)	11 kW
Rated operational current at 40 °C	81.4 A
Rated operational current at 50 °C	72 A
Rated operational current at 60 °C	62.7 A
Rated insulation voltage	480 V
Minimum settable current (% of Ie)	10 %; Relative to set Ie
Power loss during startup (50 °C)	504 W

3RW5524-1HF04 — Control & Connection
Parameter	Value
Control supply voltage type	AC/DC
Rated voltage at 50 Hz	24 V
Rated voltage at 60 Hz	24 V
Main circuit terminal type	box terminal
Control circuit wire range, solid	1x (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 output	Yes; 4 ... 20 mA (default) / 0 ... 10 V
Auxiliary contact rated current, AC-15 at 250 V	3 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 %

3RW5524-1HF04 — Protection & Features
Parameter	Value
Motor overload protection	Yes; 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 protection	Yes; Type A PTC or Klixon / Thermoclick
Adjustable current limitation	Yes
Inside-delta connection	Yes
Intrinsic device protection	Yes
Pollution degree	3, acc. to IEC 60947-4-2

3RW5524-1HF04 — Mechanical
Parameter	Value
Height	306 mm
Width	185 mm
Depth	203 mm
Weight	5.5 kg
Mounting position	Vertical (can be rotated +/- 90° and tilted forward or backward +/- 22.5°)
Fastening method	screw fixing
Mounting clearance, top	100 mm
Mounting clearance, bottom	75 mm
Mounting clearance, side	5 mm
Mounting clearance, front	10 mm

3RW5524-1HF04 — Environmental
Parameter	Value
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 altitude	2 000 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)

3RW5524-1HF04 — Specifications
Parameter	Value
Trip Class	CLASS 10A / 10E (default) / 20E / 30E; acc. to IEC 60947-4-2
Number Of Controlled Phases	3
Utilization category according to IEC 60947-4-2	AC 53a
Product Feature Integrated Bypass Contact System	Yes
Start-Up Ramp Time Of Soft Starter	0 ... 360 s
Ramp-Down Time Of Soft Starter	0 ... 360 s

3RW5524-1HF04 — Electrical
Parameter	Value
Current Limiting Value [%] Adjustable	125 ... 800 %
Starting Voltage [%]	20 ... 100 %
Stopping Voltage [%]	50 %; non-adjustable

Product details

ATEX / IECEx certified for hazardous-area motor starting

The Siemens 3RW5524-1HF04 is a SIRIUS soft starter carrying both ATEX and IECEx certification. Rated 200-480 V, it covers common three-phase low-voltage industrial supplies across Europe and North America. Trip class is field-selectable among CLASS 10A / 10E (default) / 20E / 30E per IEC 60947-4-2, which means you can match the overload protection curve to the motor thermal time constant — 10E for standard squirrel-cage motors, 20E or 30E for high-inertia loads like centrifuges or crushers.

Fail-safe output and fieldbus flexibility

One fail-safe output is built in, with a safe state defined as open load circuit — so if the safety chain drops, the starter opens its power circuit even if the control logic fails. Communication options cover Modbus RTU, Modbus TCP, PROFIBUS, and EtherNet/IP. A 4-20 mA analog output (default) or 0-10 V analog output is available for feeding motor current or torque to a PLC analog input, reducing the need for a separate transducer.

It carries UL and CSA approvals, so it is accepted in North American panel builds without a separate evaluation.

Frequently asked questions

Is the 3RW5524-1HF04 compatible with Modbus RTU or Modbus TCP?

Yes, it supports both Modbus RTU and Modbus TCP natively, plus PROFIBUS and EtherNet/IP, so it fits into most common industrial networks without a gateway.

What is the difference between the 3RW5524-1HF04 and the 3RW5524-1HD04?

The 3RW5524-1HD04 is the base variant without fail-safe output and without the ATEX/IECEx certification. The 1HF04 adds the fail-safe output, ATEX/IECEx, and the wider fieldbus set (Modbus TCP, PROFIBUS, EtherNet/IP). If you need safety-rated motor starting or hazardous-area approval, the 1HF04 is the correct choice.