{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5544-6HF14","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5544-6HF14","canonicalUrl":"https://aoctrl.com/siemens/3RW5544-6HF14","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5544-6HF14","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RW5544-6HF14 soft starter, 200-480 V rated, ATEX and IECEx certified, trip class 10A/10E/20E/30E, PROFIBUS/Modbus/EtherNet/IP, UL/CSA, 393 x 210 x 203 mm.","salesMarkdown":"## ATEX-rated soft starter for hazardous-area motor control The Siemens 3RW5544-6HF14 is a soft starter with ATEX and IECEx certification, meaning it can be installed in Zone 1 or Zone 2 explosive atmospheres where motor starting must not create an ignition source. This is the defining differentiator from standard soft starters — the ATEX marking on the nameplate is what the site electrical engineer checks before signing off the hazardous-area loop. The trip class is selectable between CLASS 10A, 10E (default), 20E, or 30E per IEC 60947-4-2, so you match the thermal overload protection to the motor's starting profile — a high-inertia fan load gets 30E, a pump gets 10A. ## Fieldbus and analog feedback for integrated control This soft starter supports PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP natively — no separate communication module needed. The controls integrator can map the starter into a Siemens S7-1500 or Rockwell ControlLogix rack over the same network as the drives and I/O, reducing gateway hardware and programming overhead. An analog output configurable for 4-20 mA or 0-10 V provides motor current or voltage feedback to a PLC analog input, useful for remote monitoring without adding a separate transducer. The accuracy class is 5 per IEC 61557-12, adequate for trend monitoring and energy logging. ## Safety functions and service factor margin The safe state is open load circuit — when the fail-safe input (1 channel) is de-energized, the starter opens the motor circuit, meeting the stop category 0 requirement for emergency stops. The B10d value of 147,000 cycles supports the reliability calculation for the safety function per ISO 13849. Service factor 1.15 means the starter can deliver 115% of its rated current continuously without tripping, matching NEMA motor service factors. This is useful when the motor runs near its nameplate rating and the process occasionally demands a short overload — the starter holds without nuisance tripping. ## Panel mounting and clearance dimensions The enclosure measures 393 mm high, 210 mm wide, and 203 mm deep — a substantial footprint that needs a backplate area roughly 400 x 220 mm for the starter alone. Clearance requirements: 100 mm above, 75 mm below, 10 mm in front, 5 mm at the sides, and 0 mm behind. The 0 mm rear clearance means it can sit flush against the back panel, saving depth in the enclosure. Screw terminals are standard, so no special crimping tooling is needed for the power and control wiring. The terminal layout follows the Siemens 3RW5 series convention — power terminals at the top, control terminals at the bottom, fieldbus connector on the side. ## Advanced motor protection and diagnostics Motor heating protection, DC braking, torque control, voltage ramp, pump ramp down, and breakaway pulse are all built in — no external add-ons. The commissioning engineer can set the starting parameters (ramp time, initial torque, current limit) directly from the keypad or over the fieldbus, and log events to the internal error logbook for post-start analysis. The trace function captures current and voltage waveforms during starting, useful for diagnosing mechanical binding or supply dips that cause start failures. Auto-reset and remote reset options let the starter recover from a trip without a manual visit to the panel.","metaTitle":"Siemens 3RW5544-6HF14 Soft Starter, 200-480 V, ATEX, UL","metaDescription":"Siemens 3RW5544-6HF14 soft starter, 200-480 V rated, ATEX and IECEx certified for hazardous areas. UL/CSA approved, trip class 10A-30E. Sourced to order.","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":"210 mm","title":"3RW5544-6HF14","Height":"393 mm","Upwards":"100 mm","Forwards":"10 mm","PROFIBUS":"Yes","at 50 Hz":"110 ... 250 V","at 60 Hz":"110 ... 250 V","Backwards":"0 mm","Downwards":"75 mm","B10d value":"147 000","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 250 A, 110-250 V AC, 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","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","PROFINET high-feature":"Yes","Ramp-Down (Soft Stop)":"Yes","Torque Limitation [%]":"20 ... 200 %","at 40 °C rated value":"433 A","at 50 °C rated value":"381 A","at 60 °C rated value":"346 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":"75 W","at 50 °C after startup":"66 W","at 60 °C after startup":"60 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":"10.2 kg","at 40 °C during startup":"3 806 W","at 50 °C during startup":"3 176 W","at 60 °C during startup":"2 787 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":"50 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":"75 kW","at 400 V at 40 °C rated value":"132 kW","Width Of Connection Bar Maximum":"45 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":"2x3NA3354-6; 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":"60 hp","at 220/230 V at 50 °C rated value":"75 hp","at 460/480 V at 50 °C rated value":"150 hp","of circuit breaker usable at 400 V":"3VA2440-7MN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10","of circuit breaker usable at 500 V":"3VA2440-7MN32-0AA0; 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":"124 ... 210 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 (50 ... 240 mm²)","Number Of Digital Outputs Not Parameterizable":"1","Type Of Voltage Of The Control Supply Voltage":"AC","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":"150 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":"100 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 (70 ... 240 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":"0.87 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":"2x3NA3354-6; Type of coordination 1, Iq = 65 kA","of circuit breaker usable at 400 V at inside-delta circuit":"3VA2450-7MN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10","of circuit breaker usable at 500 V at inside-delta circuit":"3VA2450-7MN32-0AA0; 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 Frequency":"-10 %","Relative Positive Tolerance Of The Control Supply Voltage Frequency":"10 %","Inrush Current Peak At Application Of Control Supply Voltage Maximum":"43 A","of back-up R fuse link for semiconductor protection usable up to 690 V":"3NE3335; Type of coordination 2, Iq = 65 kA","Duration Of Inrush Current Peak At Application Of Control Supply Voltage":"1.6 ms","relative negative tolerance of the control supply voltage at AC at 50 Hz":"-15 %","relative negative tolerance of the control supply voltage at AC at 60 Hz":"-15 %","relative positive tolerance of the control supply voltage at AC at 50 Hz":"10 %","relative positive tolerance of the control supply voltage at AC at 60 Hz":"10 %","of full range R fuse link for semiconductor protection usable up to 690 V":"3NE1331-0; 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/16c5fd32d5ddd3b6ca05a0ffc7c87ba2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=831390&mlfb=3RW5544-6HF14"},"ai":{"faq":[{"question":"What is 3RW5544-6HF14's ATEX certification?","answer":"The 3RW5544-6HF14 carries ATEX certification (Yes) and IECEx certification (Yes), meaning it is approved for installation in explosive atmospheres per the ATEX directive 2014/34/EU and the IECEx scheme. This is a factory-fitted rating, not a field-installed option — the nameplate carries the marking."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5544-6HF14","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/3RW5544-6HF14 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}