{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5243-2TC05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5243-2TC05","canonicalUrl":"https://aoctrl.com/siemens/3RW5243-2TC05","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5243-2TC05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW5243-2TC05 soft starter, 90 A minimum, 200-600 V, Class 10A/10E/20E, PROFIBUS/Modbus RTU/Modbus TCP/EtherNet/IP/PROFINET, screw fixing, 203x210x393 mm.","salesMarkdown":"## Trip class and motor protection — what the 10A/10E/20E rating means for your start profile The 3RW5243-2TC05 is a SIRIUS soft starter rated for a minimum motor current of 90 A across a 200-600 V supply range. Its trip class is configurable between CLASS 10A (default), 10E, and 20E per IEC 60947-4-2 — this sets the thermal overload curve that protects the motor during start. A Class 10A trip clears in 10 seconds at 7.2× FLA, matching standard squirrel-cage motors with normal inertia; 10E extends that window for extended-start applications like centrifuges, and 20E covers high-inertia loads such as crushers or long conveyors. ## Fieldbus connectivity — PROFIBUS, Modbus, EtherNet/IP, and PROFINET on one unit This soft starter ships with onboard PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET standard communication — no separate gateway module needed for most line integrations. PROFINET supports PROFIenergy in conjunction with the standard communication module, allowing the drive to shed idle loads during production pauses. The Modbus TCP and EtherNet/IP stacks share the same physical port, so the commissioning engineer selects the protocol via the parameter menu without a hardware swap. ## Mounting and clearance — screw-fixed chassis with defined air gaps Fastening method is screw fixing to the backplate; the unit measures 210 mm wide, 393 mm high, and 203 mm deep. Clearance requirements are specified: 100 mm upwards, 10 mm forwards, 0 mm backwards, 75 mm downwards, and 5 mm at the side. The mounting position allows a vertical surface with ±90° rotation and ±22.5° tilt forward/backward, giving the panel builder flexibility in enclosure layout while maintaining the airflow path for the heatsink. ## Ambient derating and operating envelope The unit carries a service factor of 1, meaning no built-in overload margin beyond nameplate — the trip class settings handle the thermal protection. Shock resistance is 15 g for 11 ms, with potential contact lifting noted at 12 g / 11 ms, which matters for installations on vibrating machinery or near crushers. ## Approvals and compliance — UL, CSA, CE, pollution degree 3 Approved under UL, CSA, and CE marking schemes. The pollution degree is rated 3 per IEC 60947-4-2, meaning it tolerates conductive pollution or dry non-conductive pollution that becomes conductive due to condensation — typical for industrial control panels without climate control. The minimum load is 15% of the smallest settable Ie, so the soft starter can handle lightly loaded motors without nuisance tripping. ## Application-specific features — pump ramp down and soft torque Pump ramp down is included, which gradually reduces the voltage to the motor during stop to eliminate water hammer in pumping systems. Soft torque is also available, reducing mechanical stress on the load during start. Remote reset is possible by cycling the 24 V control supply voltage. An error logbook is available only with special accessories — the base unit does not store fault history without the optional memory module.","metaTitle":"Siemens 3RW5243-2TC05 SIRIUS Soft Starter, 90 A, 200-600 V","metaDescription":"Siemens 3RW5243-2TC05 SIRIUS soft starter, 90 A minimum, 200-600 V, Class 10A/10E/20E, PROFIBUS/Modbus/EtherNet/IP. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"203 mm","Width":"210 mm","title":"3RW5243-2TC05","Height":"393 mm","Minimum":"90 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 (default) / 10E / 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 210 A, 24 V AC/DC spring-type terminals Thermistor input","CSA approval":"Yes","Remote Reset":"Yes; By turning off the control supply voltage","Analog Output":"No","Error Logbook":"Yes; Only in conjunction with special accessories","Pump Ramp Down":"Yes","Service Factor":"1","Torque Control":"No","Firmware Update":"Yes","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","Inside-Delta Circuit":"Yes","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":"364 A","at 50 °C rated value":"322 A","at 60 °C rated value":"294 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":"75 W","at 50 °C after startup":"68 W","at 60 °C after startup":"63 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":"9.9 kg","at 40 °C during startup":"3 562 W","at 50 °C during startup":"2 979 W","at 60 °C during startup":"2 617 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":"3","During Storage And Transport":"-40 ... +80 °C","Via Software Parameterizable":"No","at DC-13 at 24 V rated value":"1 A","Adjustable Current Limitation":"Yes","Electromagnetic Compatibility":"in accordance with IEC 60947-4-2","Substance Prohibitance (Date)":"02/15/2018","at AC-15 at 250 V rated value":"3 A","is supported HMI-High Feature":"Yes","of standard HMI module usable":"3RW5980-0HS00","Insulation Voltage Rated Value":"600 V","at 230 V at 40 °C rated value":"55 kW","at 400 V at 40 °C rated value":"110 kW","at 500 V at 40 °C rated value":"132 kW","At Inside-Delta Circuit Minimum":"156 A","Width Of Connection Bar Maximum":"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":"60 hp","at 460/480 V at 50 °C rated value":"150 hp","at 575/600 V at 50 °C rated value":"150 hp","of circuit breaker usable at 400 V":"3VA2325-7MN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10","of circuit breaker usable at 500 V":"3VA2325-7MN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10","At Inside-Delta Circuit Rated Value":"200 ... 600 V","at the digital inputs at AC maximum":"100 m","at the digital inputs at DC maximum":"1 000 m","of communication module Ethernet/IP":"3RW5980-0CE00","Design Of The Overvoltage Protection":"Varistor","Surge Voltage Resistance Rated Value":"6 kV","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","Removable Terminal For Control Circuit":"Yes","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":"1 600 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":"90 A","At Rotary Coding Switch On Switch Position 2":"98 A","At Rotary Coding Switch On Switch Position 3":"106 A","At Rotary Coding Switch On Switch Position 4":"114 A","At Rotary Coding Switch On Switch Position 5":"122 A","At Rotary Coding Switch On Switch Position 6":"130 A","At Rotary Coding Switch On Switch Position 7":"138 A","At Rotary Coding Switch On Switch Position 8":"146 A","At Rotary Coding Switch On Switch Position 9":"154 A","for DIN cable lug for main contacts stranded":"2x (50 ... 240 mm²)","At Rotary Coding Switch On Switch Position 10":"162 A","At Rotary Coding Switch On Switch Position 11":"170 A","At Rotary Coding Switch On Switch Position 12":"178 A","At Rotary Coding Switch On Switch Position 13":"186 A","At Rotary Coding Switch On Switch Position 14":"194 A","At Rotary Coding Switch On Switch Position 15":"202 A","At Rotary Coding Switch On Switch Position 16":"210 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":"470 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":"2x (70 ... 240 mm²)","Relative Negative Tolerance Of The Operating Voltage":"-15 %","Relative Positive Tolerance Of The Operating Voltage":"10 %","contact rating of auxiliary contacts according to UL":"R300-B300","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 catalog","Locked-Rotor Current At Close Of Bypass Contact Maximum":"7.6 A","of the gG fuse usable at inside-delta circuit up to 500 V":"2x3NA3354-6; Type of coordination 1, Iq = 65 kA","of circuit breaker usable at 400 V at inside-delta circuit":"3VA2440-7MN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10","of circuit breaker usable at 500 V at inside-delta circuit":"3VA2440-7MN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10","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 %","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 Inside-Delta Circuit At Rotary Coding Switch On Switch Position 1":"156 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 2":"170 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 3":"184 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 4":"197 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 5":"211 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 6":"225 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 7":"239 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 8":"253 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 9":"267 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 10":"281 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 11":"294 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 12":"308 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 13":"322 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 14":"336 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 15":"350 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 16":"364 A","of back-up R fuse link for semiconductor protection usable up to 690 V":"3NE3333; Type of coordination 2, Iq = 65 kA","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 %","of full range R fuse link for semiconductor protection usable up to 690 V":"3NE1230-2; Type of coordination 2, Iq = 65 kA","at AWG cables for control circuit finely stranded with core end processing":"2x (24 ... 16)","Relative Negative Tolerance Of The Operating Voltage At Inside-Delta Circuit":"-15 %","Relative Positive Tolerance Of The Operating Voltage At Inside-Delta Circuit":"10 %"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a824b5296ac17c342b6ed7378947092f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=830637&mlfb=3RW5243-2TC05"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5243-2TC05","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/3RW5243-2TC05 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}