{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5055-6AB14","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5055-6AB14","canonicalUrl":"https://aoctrl.com/siemens/3RW5055-6AB14","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5055-6AB14","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW5055-6AB14 soft starter, 68 A minimum setting, 200-480 V rated voltage, ATEX, UKEX, UL, CSA, CE, PROFIBUS, Modbus RTU/TCP, EtherNet/IP.","salesMarkdown":"The Siemens 3RW5055-6AB14 is a SIRIUS soft starter, a hybrid switching device that ramps motor voltage up and down to limit inrush current and mechanical stress on startup and stop. It is rated for a minimum motor current setting of 68 A and a supply voltage of 200... 480 V, making it suitable for medium-sized induction motors in pump, fan, and conveyor applications where controlled acceleration and deceleration are needed. It also holds UL, CSA, and CE approvals, covering North American and European regulatory jurisdictions for panel builders and OEMs shipping globally. The minimum settable current is 68 A, which means the soft starter can be adjusted down to protect smaller motors within its range — useful when the BOM calls for a single starter size across slightly different motor ratings. The rated voltage of 200... 480 V covers common three-phase supplies from 208 V North American to 400 V European without needing a different variant. Trip class is selectable between CLASS 10A, 10E (preset), and 20E per IEC 60947-4-2. CLASS 10A suits standard motor starts with short acceleration times; CLASS 20E gives extra headroom for high-inertia loads like centrifuges or long conveyors that take longer to reach speed. The preset 10E is a common middle ground for general-purpose duty. Operating temperature range is -25... +60 °C, but derating is required at 40 °C or above. ## Communication and control features The 3RW5055-6AB14 supports PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP, giving flexibility to integrate into existing fieldbus architectures without a separate gateway. PROFIenergy is available when used with a PROFINET communication module, allowing energy management functions during idle periods. Soft Torque, Voltage Ramp, and Pump Ramp Down are built-in starting and stopping profiles. Soft Torque reduces mechanical shock on geared loads; Pump Ramp Down minimizes water hammer in pumping systems by gradually reducing voltage rather than coasting to a stop. An analog output is configurable as 4... 20 mA (default) or 0... 10 V via the High Feature HMI, providing a real-time current or motor load signal to a PLC or panel meter. Remote reset is possible by cycling the control supply voltage. ## Mounting and mechanical integration Mounting is by screw fixing, not DIN rail. The unit measures 120 mm wide, 198 mm high, and 249 mm deep, with specified clearance requirements: 100 mm upwards, 10 mm forwards, 75 mm downwards, 5 mm at the sides, and 0 mm backwards. These clearances must be maintained for airflow and to prevent contact lifting under shock — the shock resistance rating is 15 g / 11 ms, dropping to 12 g / 11 ms if contact lifting is a concern. Given the multi-protocol communication and ATEX/UKEX certifications, this is a specified-into-the-BOM part for many OEMs and panel builders.","metaTitle":"Siemens 3RW5055-6AB14 Soft Starter, 68A min, ATEX, 200-480V","metaDescription":"Siemens 3RW5055-6AB14 soft starter, 68 A minimum setting, 200-480 V rated voltage, ATEX and UKEX certified. Current lifecycle stage. UL, CSA, CE approved. PROFIBUS, Modbus RTU/TCP,","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"ATEX":"Yes","UKEX":"Yes","Depth":"249 mm","IECEx":"Yes","Width":"120 mm","title":"3RW5055-6AB14","Height":"198 mm","Minimum":"68 A","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","CE marking":"Yes","Modbus RTU":"Yes","Modbus TCP":"Yes","Trip Class":"CLASS 10A / 10E (preset) / 20E; 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 communication module","Rated Value":"200 ... 480 V","Soft Torque":"Yes","UL approval":"Yes","description":"SIRIUS soft starter 200-480 V 143 A, 110-250 V AC Screw terminals Analog output","CSA approval":"Yes","Remote Reset":"Yes; By turning off the control supply voltage","Voltage Ramp":"Yes","Analog Output":"Yes; 4 ... 20 mA (default) / 0 ... 10 V (parameterizable with High Feature HMI)","Error Logbook":"Yes; Only in conjunction with special accessories","Pump Ramp Down":"Yes","Service Factor":"1","Torque Control":"No","lifecycle_stage":"current","During Operation":"-25 ... +60 °C; Please observe derating at temperatures of 40 °C or above","Fastening Method":"screw fixing","HMI-High Feature":"No","Minimum Load [%]":"15 %; Relative to smallest settable Ie","Product Category":"Hybrid switching devices","Shock Resistance":"15 g / 11 ms, from 12 g / 11 ms with potential contact lifting","Mounting Position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back","PROFINET standard":"Yes","Product Brand Name":"SIRIUS","Degree Of Pollution":"3, acc. to IEC 60947-4-2","For Control Circuit":"screw-type terminals","Not Parameterizable":"2","Product Designation":"Soft starter","Starting Voltage [%]":"30 ... 100 %","Stopping Voltage [%]":"50 %; non-adjustable","Vibration Resistance":"15 mm to 6 Hz; 2g to 500 Hz","Ramp-Down (Soft Stop)":"Yes","at 40 °C rated value":"143 A","at 50 °C rated value":"128 A","at 60 °C rated value":"118 A","Communication Function":"Yes","Digital Output Version":"2 normally-open contacts (NO) / 1 changeover contact (CO)","Ramp-Up (Soft Starting)":"Yes","at 40 °C after startup":"23 W","at 50 °C after startup":"19 W","at 60 °C after startup":"16 W","EMC emitted interference":"acc. to IEC 60947-4-2: Class A","For Main Current Circuit":"busbar connection","Number Of Analog Outputs":"1","Number Of Digital Inputs":"1","Weight Without Packaging":"3.2 kg","at 40 °C during startup":"1 336 W","at 50 °C during startup":"1 134 W","at 60 °C during startup":"1 007 W","For Control Circuit Solid":"1x (0.5 ... 4.0 mm²), 2x (0.5 ... 2.5 mm²)","Motor Overload Protection":"Yes; Electronic motor overload protection","Number Of Digital Outputs":"3","Via Software Configurable":"Yes","is supported HMI-Standard":"Yes","Impulse Voltage Rated Value":"6 kV","Intrinsic Device Protection":"Yes","Number Of Controlled Phases":"2","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":"No","at DC-13 at 24 V rated value":"1 A","Adjustable Current Limitation":"Yes","Substance Prohibitance (Date)":"09/23/2019","at AC-15 at 250 V rated value":"3 A","is supported HMI-High Feature":"Yes","of standard HMI module usable":"3RW5980-0HS01","Insulation Voltage Rated Value":"600 V","Ramp-Down Time Of Soft Starter":"0 ... 20 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","Control Supply Voltage Frequency":"50 ... 60 Hz","Operating Measured Value Display":"Yes; Only in conjunction with special accessories","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":"600 V","Start-Up Ramp Time Of Soft Starter":"0 ... 20 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 assignment 1, Iq = 20 kA","of circuit breaker usable at 500 V":"3VA2220-7MN32-0AA0 ; Type of assignment 1, Iq = 20 kA","at the digital inputs at AC maximum":"1 000 m","of communication module Ethernet/IP":"3RW5980-0CE00","Design Of The Overvoltage Protection":"Varistor","Surge Voltage Resistance Rated Value":"6 kV","of line contactor usable up to 480 V":"3RT1055","of line contactor usable up to 690 V":"3RT1055","Current Limiting Value [%] Adjustable":"130 ... 700 %","during storage according to IEC 60721":"1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4","Between Soft Starter And Motor Maximum":"800 m","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","Blocking Voltage Of The Thyristor Maximum":"1 400 V","Evaluation Of Thermistor Motor Protection":"No","of communication module Modbus RTU usable":"3RW5980-0CR00","of communication module Modbus TCP usable":"3RW5980-0CT00","For Main Contacts With Screw-Type Terminals":"89 ... 124 lbf·in","At Rotary Coding Switch On Switch Position 1":"68 A","At Rotary Coding Switch On Switch Position 2":"73 A","At Rotary Coding Switch On Switch Position 3":"78 A","At Rotary Coding Switch On Switch Position 4":"83 A","At Rotary Coding Switch On Switch Position 5":"88 A","At Rotary Coding Switch On Switch Position 6":"93 A","At Rotary Coding Switch On Switch Position 7":"98 A","At Rotary Coding Switch On Switch Position 8":"103 A","At Rotary Coding Switch On Switch Position 9":"108 A","at AWG cables for main current circuit solid":"4 ... 250 kcmil","for DIN cable lug for main contacts stranded":"16 ... 95 mm²","At Rotary Coding Switch On Switch Position 10":"113 A","At Rotary Coding Switch On Switch Position 11":"118 A","At Rotary Coding Switch On Switch Position 12":"123 A","At Rotary Coding Switch On Switch Position 13":"128 A","At Rotary Coding Switch On Switch Position 14":"133 A","At Rotary Coding Switch On Switch Position 15":"138 A","At Rotary Coding Switch On Switch Position 16":"143 A","Type Of Voltage Of The Control Supply Voltage":"AC","Holding Current In Bypass Operation Rated Value":"80 mA","utilization category according to IEC 60947-4-2":"AC-53a","Product Feature Integrated Bypass Contact System":"Yes","of communication module PROFINET standard usable":"3RW5980-0CS00","Control Supply Current In Standby Mode Rated Value":"30 mA","for DIN cable lug for main contacts finely stranded":"25 ... 120 mm²","Relative Negative Tolerance Of The Operating Voltage":"-15 %","Relative Positive Tolerance Of The Operating Voltage":"10 %","Inrush Current By Closing The Bypass Contacts Maximum":"2.5 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":"5 000 m; derating as of 1000 m, see Manual","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)","For Main Contacts For Box Terminal Using Both Clamping Points Solid":"max. 1x 95 mm², 1x 120 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":"12.2 A","For Main Contacts For Box Terminal Using Both Clamping Points Stranded":"max. 2x 120 mm²","For Main Contacts For Box Terminal Using The Back Clamping Point Solid":"16 ... 120 mm²","of back-up R fuse link for semiconductor protection usable up to 690 V":"3NE3 334 -0B ; Type of coordination 2, Iq = 65 kA","For Main Contacts For Box Terminal Using The Front Clamping Point Solid":"16 ... 120 mm²","Duration Of Inrush Current Peak At Application Of Control Supply Voltage":"2.2 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 %","For Main Contacts For Box Terminal Using The Back Clamping Point Stranded":"16 ... 120 mm²","of full range R fuse link for semiconductor protection usable up to 690 V":"3NE1 227-0 ; Type of coordination 2, Iq = 65 kA","For Main Contacts For Box Terminal Using The Front Clamping Point Stranded":"16 ... 70 mm²","at AWG cables for main contacts for box terminal using the back clamping point":"6 ... 250 kcmil","For Main Contacts For Box Terminal Using Both Clamping Points Finely Stranded With Core End Processing":"max. 1x 95 mm², 1x 120 mm²","For Main Contacts For Box Terminal Using Both Clamping Points Finely Stranded Without Core End Processing":"max. 1x 95 mm², 1x 120 mm²","For Main Contacts For Box Terminal Using The Back Clamping Point Finely Stranded With Core End Processing":"16 ... 120 mm²","For Main Contacts For Box Terminal Using The Front Clamping Point Finely Stranded With Core End Processing":"16 ... 120 mm²","For Main Contacts For Box Terminal Using The Back Clamping Point Finely Stranded Without Core End Processing":"10 ... 120 mm²","For Main Contacts For Box Terminal Using The Front Clamping Point Finely Stranded Without Core End Processing":"10 ... 120 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,137.92 – $1,710.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/daf6968296572d825ffd149322e877b6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=830504&mlfb=3RW5055-6AB14"},"ai":{"faq":[{"question":"What certifications does the 3RW5055-6AB14 carry?","answer":"It carries ATEX, UKEX, UL, CSA, and CE marking, covering hazardous-location use (ATEX/UKEX) and North American/European regulatory compliance."},{"question":"What communication protocols does this soft starter support?","answer":"It supports PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP natively, with PROFIenergy available via a PROFINET communication module."},{"question":"What trip classes are available on the 3RW5055-6AB14?","answer":"Trip class is selectable between CLASS 10A, CLASS 10E (preset), and CLASS 20E per IEC 60947-4-2, allowing matching to motor start characteristics."},{"question":"What are the mounting clearance requirements?","answer":"Required clearances are 100 mm upwards, 10 mm forwards, 75 mm downwards, 5 mm at the sides, and 0 mm backwards. Mounting is by screw fixing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5055-6AB14","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/3RW5055-6AB14 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}}