{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5055-6TB04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5055-6TB04","canonicalUrl":"https://aoctrl.com/siemens/3RW5055-6TB04","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5055-6TB04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RW5055-6TB04 soft starter, 68 A minimum current, 200-480 V, trip class 10A/10E/20E, ATEX/UKEX/IECEx, PROFIBUS/Modbus/EtherNet/IP/PROFINET, 120x198x249 mm.","salesMarkdown":"## Panel fit and mounting reality The 3RW5055-6TB04 measures 120 mm wide by 198 mm high by 249 mm deep — that depth includes the heat sink and fieldbus module, so account for it when laying out the gland plate and cable duct. Mounting is screw-fix only, no DIN-rail clip; the vertical mounting surface can rotate ±90° or tilt ±22.5° front-to-back, which helps when you're shoehorning it into a crowded MCC bucket. Clearance requirements: 100 mm above, 75 mm below, 10 mm in front, 5 mm to the side, and zero at the back. That 100 mm upward gap is non-negotiable for heat dissipation — the unit derates above 40 °C ambient, and stacking cabinets without that headroom will trip you into the derating curve faster than expected. ## Motor protection and trip class options Minimum load is 15% of the smallest settable Ie, and the minimum operating current is 68 A. That 68 A floor means this unit won't regulate a motor drawing less than that — if your BOM has a 30 A FLC motor, step down to a smaller frame. ## Fieldbus and control wiring Built-in fieldbus support covers PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET standard — no add-on module required for any of those. PROFIenergy is available when paired with the PROFINET communication module, which lets the drive park the motor during production pauses and save panel cooling load. Auto-reset and remote reset (by cycling the control supply voltage) are both supported. That remote reset is useful when the starter is inside a locked MCC and the operator station is 50 m away — no need to walk over and push a button. ## Hazardous-area approvals and compliance ATEX, UKEX, and IECEx approvals are all listed — this unit is certified for use in explosive atmospheres. That's a hard requirement for chemical, oil and gas, or grain-handling lines where a standard soft starter would fail the safety case. The ATEX marking means the starter itself won't become an ignition source in a Zone 1 or Zone 2 gas group environment. The UL listing is essential for any panel destined for a US or Canadian site — without it, the local inspector flags the whole cabinet. If you're replacing an older 3RW5 series unit, confirm the control voltage and fieldbus revision match your existing cabinet wiring before committing.","metaTitle":"Siemens 3RW5055-6TB04 Soft Starter, 68A Min, 200-480V, ATEX","metaDescription":"Siemens 3RW5055-6TB04 soft starter, 68A minimum current, 200-480V, trip class 10A/10E/20E. ATEX/UKEX/IECEx approved.","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":"3RW5055-6TB04","Height":"198 mm","Minimum":"68 A","Upwards":"100 mm","Forwards":"10 mm","PROFIBUS":"Yes","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, 24 V AC/DC Screw terminals Thermistor input","CSA approval":"Yes","Remote Reset":"Yes; By turning off the control supply voltage","Voltage Ramp":"Yes","Analog Output":"No","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","at DC rated value":"24 V","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","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","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":"0","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; Full motor protection (thermistor motor protection and 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":"Yes; Type A PTC or Klixon / Thermoclick","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/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":"360 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":"160 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":"7.6 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)","relative negative tolerance of the control supply voltage at DC":"-20 %","relative positive tolerance of the control supply voltage at DC":"20 %","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":"3.3 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":"12.1 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 %","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/715e8b19d011ef67c3867c62b7b4080f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=830506&mlfb=3RW5055-6TB04"},"ai":{"faq":[{"question":"What ATEX and UKEX approvals does the 3RW5055-6TB04 carry?","answer":"ATEX, UKEX, and IECEx approvals are all listed on this unit, making it suitable for explosive atmosphere installations in Zone 1 and Zone 2 gas groups."},{"question":"What fieldbus protocols does the 3RW5055-6TB04 support?","answer":"Built-in support for PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET standard. PROFIenergy is available when used with the PROFINET communication module."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5055-6TB04","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/3RW5055-6TB04 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}}