{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5073-2TB05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5073-2TB05","canonicalUrl":"https://aoctrl.com/siemens/3RW5073-2TB05","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5073-2TB05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RW5073-2TB05 soft starter, 100 A minimum operating current, 200–600 V control supply, ATEX and IECEx certified, trip class 10A/10E/20E, PROFIBUS/Modbus/EtherNet/IP/PROFINET, UL/CSA/CE.","salesMarkdown":"## Hazardous-area motor starting with ATEX certification The 3RW5073-2TB05 is a Siemens soft starter carrying ATEX and IECEx certification, meaning it is approved for installation in explosive atmospheres where gas or dust hazards are present. This is the primary differentiator from standard soft starters — the ATEX marking and IECEx marking allow direct integration into Zone 1/21 or Zone 2/22 motor control circuits without additional enclosure isolation. Rated for a minimum operating current of 100 A with a control supply voltage range of 200–600 V, this unit covers global line voltages from 208 V to 600 V without a transformer tap change. The wide input window simplifies BOM planning for multi-voltage sites. ## Trip class and overload protection for motor heating The trip class is configurable as CLASS 10A, 10E, or 20E per IEC 60947-4-2. The preset is 10E, which matches most pump and fan applications. The minimum load setting is 15 % of the smallest settable Ie, which means the starter can be tuned down to protect lightly loaded motors without nuisance tripping. This is relevant when the motor FLA is near the lower end of the 100 A minimum. ## Fieldbus integration and communication options The 3RW5073-2TB05 supports PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET with PROFIenergy. This multi-protocol capability means the same hardware can be commissioned on a Rockwell ControlLogix network (EtherNet/IP) or a Siemens S7-1500 (PROFINET) without a gateway. The PROFIenergy profile allows the starter to pause loads during production breaks, saving energy at the panel level. Remote reset is achieved by cycling the 24 V DC control supply off and on. The error logbook is available only with special accessories — if fault logging is required for your maintenance plan, factor in the additional module at the BOM stage. ## Mounting dimensions and panel integration The unit measures 160 mm wide × 230 mm high × 282 mm deep and is fastened via screw fixing. The mounting position allows vertical surface mounting with ±90° rotation and ±22.5° tilt forward/backward — this gives flexibility in tight enclosures but requires the derating curve to be checked if the unit is not vertically oriented. Clearance requirements: 100 mm upwards, 10 mm forwards, 0 mm backwards, 75 mm downwards, and 5 mm at the sides. The zero backward clearance means the unit can be mounted flush against the back panel, saving depth in shallow enclosures. ## Operating temperature and derating In a non-air-conditioned panel in a Middle East or Southeast Asian plant, the internal temperature can exceed 50 °C — the derating curve must be applied to the continuous current rating to avoid thermal overload trips during normal running. Shock resistance is rated at 15 g / 11 ms, with potential contact lifting above 12 g / 11 ms. For installations on vibrating machinery (compressors, large conveyors), the mounting bracket should be isolated or the shock spec verified against the machine's vibration profile. ## Compliance and approvals for global installations The 3RW5073-2TB05 carries UL approval, CSA approval, and CE marking. For a panel destined for a US chemical plant with ATEX-rated equipment, this single starter satisfies both NEC and IECEx requirements without a separate enclosure. ## Sourcing and lifecycle — active production For a line-down spare or a new project BOM, this part is sourced through authorized distribution channels and quoted to order against the RFQ quantity.","metaTitle":"Siemens 3RW5073-2TB05 Soft Starter, 100 A min, ATEX","metaDescription":"Siemens 3RW5073-2TB05 soft starter, rated 100 A minimum, ATEX/IECEx certified for hazardous areas. Active production, UL/CSA/CE approved.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"ATEX":"Yes","Depth":"282 mm","IECEx":"Yes","Width":"160 mm","title":"3RW5073-2TB05","Height":"230 mm","Minimum":"100 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 250 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":"250 A","at 50 °C rated value":"220 A","at 60 °C rated value":"200 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":"18 W","at 60 °C after startup":"15 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":"7.3 kg","at 40 °C during startup":"2 454 W","at 50 °C during startup":"2 043 W","at 60 °C during startup":"1 786 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":"75 kW","at 400 V at 40 °C rated value":"132 kW","at 500 V at 40 °C rated value":"160 kW","Width Of Connection Bar Maximum":"35 mm; with connection cover 3RT1966-4EA1 maximum length 45 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":"2x3NA3354-6; 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":"60 hp","at 220/230 V at 50 °C rated value":"75 hp","at 460/480 V at 50 °C rated value":"150 hp","at 575/600 V at 50 °C rated value":"200 hp","of circuit breaker usable at 400 V":"3VA2440-7MN32-0AA0; Type of assignment 1, Iq = 65 kA","of circuit breaker usable at 500 V":"3VA2440-7MN32-0AA0; Type of assignment 1, Iq = 65 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":"3RT1065","of line contactor usable up to 690 V":"3RT1065","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":"1 600 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":"124 ... 210 lbf·in","At Rotary Coding Switch On Switch Position 1":"100 A","At Rotary Coding Switch On Switch Position 2":"110 A","At Rotary Coding Switch On Switch Position 3":"120 A","At Rotary Coding Switch On Switch Position 4":"130 A","At Rotary Coding Switch On Switch Position 5":"140 A","At Rotary Coding Switch On Switch Position 6":"150 A","At Rotary Coding Switch On Switch Position 7":"160 A","At Rotary Coding Switch On Switch Position 8":"170 A","At Rotary Coding Switch On Switch Position 9":"180 A","at AWG cables for main current circuit solid":"2/0 ... 500 kcmil","for DIN cable lug for main contacts stranded":"50 ... 240 mm²","At Rotary Coding Switch On Switch Position 10":"190 A","At Rotary Coding Switch On Switch Position 11":"200 A","At Rotary Coding Switch On Switch Position 12":"210 A","At Rotary Coding Switch On Switch Position 13":"220 A","At Rotary Coding Switch On Switch Position 14":"230 A","At Rotary Coding Switch On Switch Position 15":"240 A","At Rotary Coding Switch On Switch Position 16":"250 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":"490 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":"70 ... 240 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":"min. 2x 70 mm², max. 2x 240 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":"min. 2x 70 mm², max. 2x 240 mm²","For Main Contacts For Box Terminal Using The Back Clamping Point Solid":"120 ... 240 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":"95 ... 300 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":"120 ... 240 mm²","of full range R fuse link for semiconductor protection usable up to 690 V":"3NE1 331-0; Type of coordination 2, Iq = 65 kA","For Main Contacts For Box Terminal Using The Front Clamping Point Stranded":"95 ... 300 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":"250 ... 500 kcmil","at AWG cables for main contacts for box terminal using the front clamping point":"3/0 ... 600 kcmil","For Main Contacts For Box Terminal Using Both Clamping Points Finely Stranded With Core End Processing":"min. 2x 50 mm², max. 2x 185 mm²","For Main Contacts For Box Terminal Using Both Clamping Points Finely Stranded Without Core End Processing":"min. 2x 50 mm², max. 2x 185 mm²","For Main Contacts For Box Terminal Using The Back Clamping Point Finely Stranded With Core End Processing":"120 ... 185 mm²","For Main Contacts For Box Terminal Using The Front Clamping Point Finely Stranded With Core End Processing":"70 ... 240 mm²","For Main Contacts For Box Terminal Using The Back Clamping Point Finely Stranded Without Core End Processing":"120 ... 185 mm²","For Main Contacts For Box Terminal Using The Front Clamping Point Finely Stranded Without Core End Processing":"70 ... 240 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2b392d02a66bc8f10f1cbc3efff86873.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=830747&mlfb=3RW5073-2TB05"},"ai":{"faq":[{"question":"What ATEX certification does 3RW5073-2TB05 carry?","answer":"The 3RW5073-2TB05 is ATEX certified and also carries IECEx certification. This qualifies it for installation in explosive atmospheres (gas and dust) without requiring additional enclosure isolation, per the ATEX 2014/34/EU directive."},{"question":"What is the minimum operating current for 3RW5073-2TB05?","answer":"The minimum operating current is 100 A. This sets the lower bound for motor full-load amps — the starter cannot be adjusted below this value. For motors with FLA below 100 A, a smaller frame soft starter would be required."},{"question":"What fieldbus protocols does 3RW5073-2TB05 support?","answer":"It supports PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET with PROFIenergy. This covers the major industrial Ethernet and fieldbus networks without additional gateways."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5073-2TB05","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/3RW5073-2TB05 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}}