{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5056-2TB05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5056-2TB05","canonicalUrl":"https://aoctrl.com/siemens/3RW5056-2TB05","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5056-2TB05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RW5056-2TB05 soft starter, 81 A minimum operating current, 200–600 V supply voltage, trip class 10A/10E/20E per IEC 60947-4-2, ATEX/UKEX/IECEx certified, 120 x 198 x 249 mm screw-fixed mounting.","salesMarkdown":"## Active production, multi-protocol fieldbus The 3RW5056-2TB05: Fieldbus integration covers PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET standard, with PROFIenergy support when paired with the PROFINET communication module. This allows the starter to participate in energy management and coordinated start sequences on a single network. ## Explosion-protected area deployment The unit holds ATEX, UKEX, and IECEx certification, qualifying it for installation in potentially explosive atmospheres where standard soft starters would be prohibited. This is a key differentiator for sites governed by the ATEX Directive 2014/34/EU or IECEx Scheme. North American market acceptance is confirmed by UL and CSA approvals. ## Mounting and physical integration Dimensions are 120 mm width, 198 mm height, 249 mm depth. Fastening method is screw fixing — no DIN-rail clip. Mounting position allows a vertical surface with +/-90° rotation and +/-22.5° tilt forward/backward, giving flexibility in panel layout but requiring dedicated screw holes. Clearance requirements: 100 mm upwards, 75 mm downwards, 10 mm forwards, 5 mm sideways, 0 mm backwards. These minimums must be maintained for airflow and service access — a panel designed for a different starter may need re-spacing. ## Application-specific starting profiles Soft torque, voltage ramp, and pump ramp down are built-in functions. Pump ramp down reduces the deceleration rate to prevent water hammer in pumping systems — a common failure mode in water/wastewater installations. Remote reset is available by cycling the control supply voltage. Minimum load is 15 % of the smallest settable Ie, ensuring the starter can handle lightly loaded motors without nuisance tripping. Auto-reset is supported for unattended restart after a fault clears. ## Sourcing and compliance documentation Compliance documentation includes CE marking, UL, CSA, ATEX, UKEX, and IECEx certificates. The unit is classified under product category 'Hybrid switching devices' and carries a service factor of 1.","metaTitle":"Siemens 3RW5056-2TB05 Soft Starter, 81 A Min, 200–600 V","metaDescription":"Siemens 3RW5056-2TB05 soft starter, 81 A minimum operating current, 200–600 V supply, trip class 10A/10E/20E. ATEX/UKEX/IECEx certified.","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":"3RW5056-2TB05","Height":"198 mm","Minimum":"81 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 ... 600 V","Soft Torque":"Yes","UL approval":"Yes","description":"SIRIUS soft starter 200-600 V 171 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":"171 A","at 50 °C rated value":"153 A","at 60 °C rated value":"141 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":"29 W","at 50 °C after startup":"23 W","at 60 °C after startup":"20 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":"5.2 kg","at 40 °C during startup":"1 751 W","at 50 °C during startup":"1 478 W","at 60 °C during startup":"1 308 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":"45 kW","at 400 V at 40 °C rated value":"90 kW","at 500 V at 40 °C rated value":"110 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":"50 hp","at 220/230 V at 50 °C rated value":"50 hp","at 460/480 V at 50 °C rated value":"100 hp","at 575/600 V at 50 °C rated value":"150 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":"3RT1056","of line contactor usable up to 690 V":"3RT1064","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","Blocking Voltage Of The Thyristor Maximum":"1 800 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":"81 A","At Rotary Coding Switch On Switch Position 2":"87 A","At Rotary Coding Switch On Switch Position 3":"93 A","At Rotary Coding Switch On Switch Position 4":"99 A","At Rotary Coding Switch On Switch Position 5":"105 A","At Rotary Coding Switch On Switch Position 6":"111 A","At Rotary Coding Switch On Switch Position 7":"117 A","At Rotary Coding Switch On Switch Position 8":"123 A","At Rotary Coding Switch On Switch Position 9":"129 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":"135 A","At Rotary Coding Switch On Switch Position 11":"141 A","At Rotary Coding Switch On Switch Position 12":"147 A","At Rotary Coding Switch On Switch Position 13":"153 A","At Rotary Coding Switch On Switch Position 14":"159 A","At Rotary Coding Switch On Switch Position 15":"165 A","At Rotary Coding Switch On Switch Position 16":"171 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":"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 335; 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 230-0; 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","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/bfb973eb06cc76dd5eb3009072aaf721.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=830515&mlfb=3RW5056-2TB05"},"ai":{"faq":[{"question":"What compliance certifications does the 3RW5056-2TB05 carry?","answer":"It carries ATEX, UKEX, IECEx, CE, UL, and CSA approvals. This qualifies it for explosive atmospheres per ATEX Directive 2014/34/EU and for North American installations requiring UL/CSA listing."},{"question":"Can the 3RW5056-2TB05 replace a 6ED1052-1MD08-0BA1 in an existing panel?","answer":"No direct drop-in replacement is confirmed. The 6ED1052-1MD08-0BA1 is a LOGO! logic module, not a soft starter — the two serve different functions. The 3RW5056-2TB05 requires screw fixing and specific clearance zones (100 mm up, 75 mm down) that differ from a DIN-rail-mounted controller."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5056-2TB05","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/3RW5056-2TB05 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}}