{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5055-2TB04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5055-2TB04","canonicalUrl":"https://aoctrl.com/siemens/3RW5055-2TB04","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5055-2TB04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RW5055-2TB04 soft starter, 68 A minimum, 200-480 V, ATEX, IECEx, Trip Class 10A/10E/20E, PROFIBUS, Modbus RTU/TCP, EtherNet/IP, PROFINET, screw fixing, 249 x 120 x 198 mm.","salesMarkdown":"## ATEX and IECEx — the hazardous-location angle The 3RW5055-2TB04: Both ATEX and IECEx are listed on this soft starter — that means it carries the certifications for installation in potentially explosive atmospheres (gas and dust). For a maintenance-spares purchaser or a site electrical engineer, this is the single most important compliance check: if your panel is in a Zone 1/2 or Zone 21/22 area, this part keeps the nameplate compliant without an external isolation barrier. The ATEX and IECEx marks are backed by CE and UL/CSA approvals — so the same unit ships into European ATEX directives, North American hazardous-location installations, and IECEx-adopting markets without a second variant. ## Trip Class 10A / 10E / 20E — what the selector means The trip class determines how long the soft starter can carry the starting current before the overload protection trips. Class 10A (preset) and 10E allow starting times up to 10 seconds at 7.2× Ie; Class 20E extends that to 20 seconds. For a pump or a fan with a long acceleration ramp, you dial in 20E. For a conveyor or compressor that starts under light load, 10A keeps the protection tighter. ## Fieldbus options — PROFIBUS, Modbus, EtherNet/IP, PROFINET This soft starter carries PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET on the communication module — you can drop it into a Siemens S7 environment (PROFINET/PROFIBUS) or a Rockwell/Allen-Bradley line (EtherNet/IP) without a gateway. Modbus TCP covers the rest of the PLC landscape. PROFIenergy is supported in conjunction with the PROFINET standard communication module — useful for data-center or production-line energy management where the soft starter needs to report power consumption or enter standby on command. ## Mounting and panel fit — dimensions and clearances The 3RW5055-2TB04 measures 249 mm deep, 120 mm wide, and 198 mm high — a compact footprint for a 68 A soft starter. It mounts via screw fixing (not DIN-rail snap-on), so budget for four mounting holes on the backplate. Clearance requirements: 100 mm upwards, 10 mm forwards, 0 mm backwards, 75 mm downwards, and 5 mm at the sides. The 0 mm backwards clearance means it can sit flush against the backpanel — useful when you're packing multiple starters into a single enclosure. Mounting position is flexible: vertical surface with ±90° rotation and ±22.5° tilt front-to-back. That covers most panel layouts without needing a special bracket. ## Operating temperature and derating Rated for -25°C to +60°C during operation — but the spec explicitly notes derating at temperatures of 40°C or above. If your panel ambient runs at 50°C, expect the continuous current rating to drop; the exact derating curve is in the manual. For a data-center or foundry installation, factor this into the thermal budget. Shock resistance is 15 g / 11 ms, dropping to 12 g / 11 ms with potential contact lifting — relevant for mobile or high-vibration installations like mining conveyors or shipboard pumps. ## Soft-start features — voltage ramp, pump ramp down, soft torque Voltage ramp and soft torque are both present — voltage ramp gives a linear acceleration profile, while soft torque reduces the initial current spike for loads that are sensitive to sudden torque (like a conveyor with a loose belt or a pump with a closed discharge valve). Pump ramp down is also listed — this extends the deceleration time to prevent water hammer in pumping systems. If you're replacing a failed starter on a wastewater lift station, this feature alone justifies the swap. Auto-reset and remote reset (by cycling the control supply voltage) are supported — useful for unattended sites where you want the starter to retry after a fault without a site visit.","metaTitle":"Siemens 3RW5055-2TB04 Soft Starter, 68 A, 200-480 V, ATEX","metaDescription":"Siemens 3RW5055-2TB04 soft starter, 68 A minimum, 200-480 V, ATEX/IECEx certified, Trip Class 10A/10E/20E. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"ATEX":"Yes","Depth":"249 mm","IECEx":"Yes","Width":"120 mm","title":"3RW5055-2TB04","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 Spring-loaded 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":"spring-loaded 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":"2x (0.25 ... 1.5 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":"2x (24 ... 16)","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","accuracy class according to IEC 61557-12":"5 %","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 %","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","Locked-Rotor Current At Close Of Bypass Contact Maximum":"7.6 A","For Auxiliary And Control Contacts With Screw-Type Terminals":"7 ... 10.3 lbf·in","For Control Circuit Finely Stranded With Core End Processing":"2x (0.25 ... 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 control circuit finely stranded with core end processing":"2x (24 ... 16)","at AWG cables for main contacts for box terminal using the back clamping point":"6 ... 250 kcmil","at AWG cables for main contacts for box terminal using the front 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/5fe0ef2b6e21e8ecbf0a252a47eff721.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=830498&mlfb=3RW5055-2TB04"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 3RW5055-2TB04?","answer":"The unit carries CE marking, UL approval, CSA approval, ATEX, and IECEx certification. RoHS and REACH compliance are standard for Siemens industrial controls of this generation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5055-2TB04","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/3RW5055-2TB04 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}}