{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5535-6HF04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5535-6HF04","canonicalUrl":"https://aoctrl.com/siemens/3RW5535-6HF04","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5535-6HF04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RW5535-6HF04 soft starter, ATEX and IECEx certified, 200-480 V rated, selectable trip classes 10A/10E/20E/30E, screw terminal, 185 x 306 x 203 mm (WxHxD).","salesMarkdown":"## ATEX-certified soft starter for hazardous-area motor starting The Siemens 3RW5535-6HF04 is a soft starter carrying both ATEX and IECEx certification, meaning it can be installed in Zone 1 or Zone 2 gas atmospheres and Zone 21 or Zone 22 dust atmospheres per the ATEX directive. This is not a standard soft starter — the ATEX mark tells you the internal components and enclosure are designed to prevent an ignition source in a defined hazardous area. Pair it with an ATEX-rated motor and the installation meets the full equipment directive for explosive environments. Rated for 200 to 480 V AC, this unit covers the common low-voltage industrial supply range across Europe, North America, and much of Asia. The voltage tolerance means it will handle a 400 V 50 Hz line or a 480 V 60 Hz line without derating — one part number for multi-voltage plants. ## Trip class flexibility — match the load, not the rule The 3RW5535-6HF04 offers selectable trip classes CLASS 10A / 10E (default) / 20E / 30E per IEC 60947-4-2. Class 10A is the standard for most motor starting — 10 seconds of overload at 7.2× rated current before tripping. The selector lets the commissioning engineer set the protection to the load without changing hardware. Trip class 10E is the default out of the box, which suits general-purpose pump and conveyor starting. Switching to 20E or 30E is a parameter change — no internal jumpers or resistor swaps. This is the same flexibility you get on a higher-end soft starter, packaged into a single frame. ## Multi-protocol fieldbus and analog feedback This soft starter supports Modbus RTU, Modbus TCP, EtherNet/IP, and PROFIBUS — four industrial Ethernet and serial protocols on one device. That means it drops into a Rockwell ControlLogix system over EtherNet/IP, a Siemens S7 over PROFIBUS, or a Modbus TCP SCADA without a gateway. The analog output can be configured for 4-20 mA or 0-10 V, feeding motor current or torque to a PLC analog input for trending. PROFIenergy support is available when paired with a PROFINET communication module — this allows the soft starter to participate in energy-saving pauses during production breaks, a feature for automated lines with coordinated shutdown sequences. ## Advanced motor control and diagnostics Voltage ramp provides a controlled acceleration profile — the output voltage rises from zero to full line over a set time, reducing mechanical shock on the driven load. Pump ramp down is a separate deceleration profile that reduces pressure surge in pipelines during stop. Torque control lets the starter regulate motor torque during start, useful for conveyors that must not jerk the belt. Breakaway pulse delivers a brief high-torque pulse to break static friction before the ramp begins — critical for stuck pumps or loaded conveyors. DC braking injects DC into the motor winding to stop it quickly without a mechanical brake. Motor heating can apply a low DC current to keep the motor warm in cold environments, preventing condensation inside the winding. The event list, error logbook, and trace function store the last several faults and operating data — useful for diagnosing intermittent trips without a laptop connected. ## Physical integration and clearance Dimensions are 185 mm wide, 306 mm high, and 203 mm deep. The screw terminal wiring accepts standard power and control conductors — no special crimp tooling. Clearance requirements: 100 mm above, 10 mm in front, 0 mm behind, 75 mm below, and 5 mm at the sides. These are the minimum free-air spaces for ventilation and wiring access; crowding them will raise internal temperature and reduce the starter's continuous current rating. ## Safety and compliance UL and CSA approvals cover North American installations — the soft starter carries the cULus mark for the US and Canada. ATEX and IECEx certifications are for explosive atmospheres. The fail-safe output provides a safe state of open load circuit, which means the output contacts open on a fault or power loss, stopping the motor. B10d value of 500,000 is the mean number of cycles until 10% of the population fails dangerously — relevant for safety function calculations per IEC 61508. Accuracy Class 5 per IEC 61557-12 means the current measurement error is within 5% of the reading — good enough for motor protection and trending, but not for revenue metering. Service factor 1.15 allows the starter to run at 115% of its rated continuous current without tripping, matching typical motor service factors.","metaTitle":"Siemens 3RW5535-6HF04 Soft Starter, ATEX, 200-480V","metaDescription":"Siemens 3RW5535-6HF04 soft starter with ATEX and IECEx certification, rated 200-480 V, selectable trip classes 10A/10E/20E/30E.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"ATEX":"Yes","Depth":"203 mm","IECEx":"Yes","Width":"185 mm","title":"3RW5535-6HF04","Height":"306 mm","Upwards":"100 mm","Forwards":"10 mm","PROFIBUS":"Yes","Backwards":"0 mm","Downwards":"75 mm","B10d value":"500 000","CE marking":"Yes","DC braking":"Yes","Event List":"Yes","Modbus RTU":"Yes","Modbus TCP":"Yes","Safe State":"Open load circuit","Trip Class":"CLASS 10A / 10E (default) / 20E / 30E; acc. to IEC 60947-4-2","auto-RESET":"Yes","At The Side":"5 mm","EtherNet/IP":"Yes","PROFIenergy":"Yes; in connection with the PROFINET Standard and PROFINET High-Feature communication modules","Rated Value":"200 ... 480 V","UL approval":"Yes","description":"SIRIUS soft starter 200-480 V 143 A, 24 V AC/DC Screw terminals Fail-safe","CSA approval":"Yes","Remote Reset":"Yes","Voltage Ramp":"Yes","Analog Output":"Yes; 4 ... 20 mA (default) / 0 ... 10 V","Error Logbook":"Yes","Motor Heating":"Yes","Accuracy Class":"5 (based on IEC 61557-12)","Pump Ramp Down":"Yes","Screw Terminal":"Yes","Service Factor":"1.15","Torque Control":"Yes","Trace Function":"Yes","With Fail-Safe":"1","Breakaway Pulse":"Yes","Firmware Update":"Yes","Parameterizable":"4","lifecycle_stage":"current","Combined Braking":"Yes","During Operation":"-25 ... +60 °C; Please observe derating at temperatures of 40 °C or above","Fastening Method":"screw fixing","HMI-High Feature":"Yes","Minimum Load [%]":"10 %; Relative to set Ie","Product Category":"Hybrid switching devices","Shock Resistance":"15 g / 11 ms, from 6 g / 11 ms with potential contact lifting","Start Torque [%]":"10 ... 100 %","Mounting Position":"Vertical (can be rotated +/- 90° and tilted forward or backward +/- 22.5°)","PROFINET standard":"Yes","at DC rated value":"24 V","Product Brand Name":"SIRIUS","Application Wizards":"Yes","Degree Of Pollution":"3, acc. to IEC 60947-4-2","For Control Circuit":"screw-type terminals","Product Designation":"Failsafe soft starters","Reversing Operation":"Yes","Stopping Torque [%]":"10 ... 100 %","Alternative Run-Down":"Yes","Condition Monitoring":"Yes","Idle Time Adjustable":"0 ... 255 s","Inside-Delta Circuit":"Yes","Starting Voltage [%]":"20 ... 100 %","Stopping Voltage [%]":"50 %; non-adjustable","Vibration Resistance":"15 mm up to 6 Hz; 2 g up to 500 Hz","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","PROFINET high-feature":"Yes","Ramp-Down (Soft Stop)":"Yes","Torque Limitation [%]":"20 ... 200 %","at 40 °C rated value":"248 A","at 50 °C rated value":"222 A","at 60 °C rated value":"204 A","Communication Function":"Yes","Digital Output Version":"2 normally-open contacts (NO) / 1 normally-closed contact (NC) / 1 changeover contact (CO)","Slave Pointer Function":"Yes","Spring-Loaded Terminal":"No","according to IEC 61508":"SIL1","Ramp-Up (Soft Starting)":"Yes","at 40 °C after startup":"43 W","at 50 °C after startup":"38 W","at 60 °C after startup":"35 W","EMC emitted interference":"acc. to IEC 60947-4-2: Class A","Emergency Operation Mode":"Yes","For Main Current Circuit":"busbar connection","Number Of Analog Outputs":"1","Number Of Digital Inputs":"4","Number Of Parameter Sets":"3","Weight Without Packaging":"8.5 kg","at 40 °C during startup":"2 115 W","at 50 °C during startup":"1 795 W","at 60 °C during startup":"1 593 W","Breakaway Time Adjustable":"0 ... 2 s","For Control Circuit Solid":"1x (0.5 ... 4.0 mm²), 2x (0.5 ... 2.5 mm²)","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.","Number Of Digital Outputs":"3","Via Software Configurable":"Yes","Automatic Parameterisation":"Yes","Impulse Voltage Rated Value":"6 kV","Intrinsic Device Protection":"Yes","Number Of Controlled Phases":"3","Safe failure fraction (SFF)":"60 %","During Storage And Transport":"-40 ... +80 °C","Type Of The Motor Protection":"Electronic, tripping in the event of thermal overload of the motor","Via Software Parameterizable":"Yes","at DC-13 at 24 V rated value":"1 A","Adjustable Current Limitation":"Yes","Electromagnetic Compatibility":"acc. to IEC 60947-4-2","Substance Prohibitance (Date)":"11/22/2019","at 40 °C rated value minimum":"29 A","at AC-15 at 250 V rated value":"3 A","is supported HMI-High Feature":"Yes","Insulation Voltage Rated Value":"480 V","Ramp-Down Time Of Soft Starter":"0 ... 360 s","at 230 V at 40 °C rated value":"37 kW","at 400 V at 40 °C rated value":"75 kW","Width Of Connection Bar Maximum":"25 mm","Breakaway Voltage [%] Adjustable":"40 ... 100 %","Control Supply Voltage Frequency":"50 ... 60 Hz","Operating Measured Value Display":"Yes","Operating frequency 1 rated value":"50 Hz","Operating frequency 2 rated value":"60 Hz","of high feature HMI module usable":"3RW5980-0HF00","of the gG fuse usable up to 690 V":"3NA3244-6; Type of coordination 1, Iq = 65 kA","Between Main And Auxiliary Circuit":"480 V; does not apply for thermistor connection","Start-Up Ramp Time Of Soft Starter":"0 ... 360 s","at 200/208 V at 50 °C rated value":"40 hp","at 220/230 V at 50 °C rated value":"40 hp","at 460/480 V at 50 °C rated value":"100 hp","of circuit breaker usable at 400 V":"3VA2220-7MN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10","At Inside-Delta Circuit Rated Value":"200 ... 480 V","Programmable Control Inputs/Outputs":"Yes","at the digital inputs at DC maximum":"1 000 m","of communication module Ethernet/IP":"3RW5980-0CE00","Current Unbalance Limiting Value [%]":"10 ... 60 %","Design Of The Overvoltage Protection":"Varistor","Surge Voltage Resistance Rated Value":"6 kV","category according to EN ISO 13849-1":"2","Current Limiting Value [%] Adjustable":"125 ... 800 %","during storage according to IEC 60721":"1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4","stop category according to EN 60204-1":"0","Between Soft Starter And Motor Maximum":"800 m","Removable Terminal For Control Circuit":"Yes","according to ATEX directive 2014/34/EU":"BVS 18 ATEX F 003 X","at AWG cables for control circuit solid":"1x (20 ... 12), 2x (20 ... 14)","during operation according to IEC 60721":"3K6 (no ice formation, only occasional condensation), 3C3 (no salt mist), 3S2 (sand must not get into the devices), 3M6","during transport according to IEC 60721":"2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m)","of communication module PROFIBUS usable":"3RW5980-0CP00","reference code according to IEC 81346-2":"Q","Number of digital outputs with fail-safe":"1","Blocking Voltage Of The Thyristor Maximum":"1 400 V","Evaluation Of Thermistor Motor Protection":"Yes; Type A PTC or Klixon / Thermoclick","Number Of Digital Outputs Parameterizable":"2","average diagnostic coverage level (DCavg)":"90 %","of communication module Modbus RTU usable":"3RW5980-0CR00","of communication module Modbus TCP usable":"3RW5980-0CT00","Creep Speed In Both Directions Of Rotation":"Yes","Ground-Fault Monitoring Limiting Value [%]":"10 ... 95 %","Soft Starting At Heavy Starting Conditions":"Yes","For Main Contacts With Screw-Type Terminals":"89 ... 124 lbf·in","safety device type according to IEC 61508-2":"Type B","Recovery Time After Overload Trip Adjustable":"60 ... 1 800 s","for DIN cable lug for main contacts stranded":"2x (16 ... 95 mm²)","Number Of Digital Outputs Not Parameterizable":"1","Type Of Voltage Of The Control Supply Voltage":"AC/DC","With Conductor Cross-Section = 0.5 Mm2 Maximum":"50 m","With Conductor Cross-Section = 1.5 Mm2 Maximum":"150 m","With Conductor Cross-Section = 2.5 Mm2 Maximum":"250 m","Holding Current In Bypass Operation Rated Value":"870 mA","hardware fault tolerance according to IEC 61508":"0","utilization category according to IEC 60947-4-2":"AC 53a","PFHD with high demand rate according to EN 62061":"1E-6 1/h","Product Feature Integrated Bypass Contact System":"Yes","of communication module PROFINET standard usable":"3RW5980-0CS00","SIL Claim Limit (subsystem) according to EN 62061":"SIL 1","Control Supply Current In Standby Mode Rated Value":"440 mA","PFDavg with low demand rate according to IEC 61508":"0.09","performance level (PL) according to EN ISO 13849-1":"c","for DIN cable lug for main contacts finely stranded":"2x (25 ... 120 mm²)","Relative Negative Tolerance Of The Operating Voltage":"-15 %","Relative Positive Tolerance Of The Operating Voltage":"10 %","contact rating of auxiliary contacts according to UL":"R300-B300","of communication module PROFINET high-feature usable":"3RW5950-0CH00","Inrush Current By Closing The Bypass Contacts Maximum":"6.3 A","Design Of Short-Circuit Protection For Control Circuit":"4 A gG fuse (Icu=1 kA), 6 A quick-acting fuse (Icu=1 kA), C1 miniature circuit breaker (Icu= 600 A), C6 miniature circuit breaker (Icu= 300 A); Is not part of scope of supply","Relative Negative Tolerance Of The Operating Frequency":"-10 %","Relative Positive Tolerance Of The Operating Frequency":"10 %","Installation Altitude At Height Above Sea Level Maximum":"2 000 m; Derating as of 1000 m, see catalog","of the gG fuse usable at inside-delta circuit up to 500 V":"3NA3244-6; Type of coordination 1, Iq = 65 kA","of circuit breaker usable at 400 V at inside-delta circuit":"3VA2325-7MN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10","Diagnostics Test Interval By Internal Test Function Maximum":"1 000 s","For Auxiliary And Control Contacts With Screw-Type Terminals":"7 ... 10.3 lbf·in","For Control Circuit Finely Stranded With Core End Processing":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)","relative negative tolerance of the control supply voltage at DC":"-20 %","relative positive tolerance of the control supply voltage at DC":"20 %","Relative Negative Tolerance Of The Control Supply Voltage Frequency":"-10 %","Relative Positive Tolerance Of The Control Supply Voltage Frequency":"10 %","Inrush Current Peak At Application Of Control Supply Voltage Maximum":"7.5 A","of back-up R fuse link for semiconductor protection usable up to 690 V":"3NE3233; Type of coordination 2, Iq = 65 kA","Duration Of Inrush Current Peak At Application Of Control Supply Voltage":"20 ms","relative negative tolerance of the control supply voltage at AC at 50 Hz":"-20 %","relative negative tolerance of the control supply voltage at AC at 60 Hz":"-20 %","relative positive tolerance of the control supply voltage at AC at 50 Hz":"20 %","relative positive tolerance of the control supply voltage at AC at 60 Hz":"20 %","of full range R fuse link for semiconductor protection usable up to 690 V":"3NE1227-0; Type of coordination 2, Iq = 65 kA","Relative Negative Tolerance Of The Operating Voltage At Inside-Delta Circuit":"-15 %","Relative Positive Tolerance Of The Operating Voltage At Inside-Delta Circuit":"10 %","OFF-delay time with safety-related request when switched off via control inputs maximum":"100 ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7b4121afe0bbadfaa98813032a80674a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=831328&mlfb=3RW5535-6HF04"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RW5535-6HF04?","answer":"Submit an RFQ against this part number. No stock level or price is published here."},{"question":"What compliance documentation does Siemens provide for 3RW5535-6HF04?","answer":"The soft starter carries CE marking, UL approval, CSA approval, ATEX certification, and IECEx certification. These cover the EU low-voltage and ATEX directives, North American safety standards, and international hazardous-area requirements. The manufacturer provides a declaration of conformity and the ATEX/IECEx certificate upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5535-6HF04","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RW5535-6HF04 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}