{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW5235-2AC05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW5235-2AC05","canonicalUrl":"https://aoctrl.com/siemens/3RW5235-2AC05","factsUrl":"https://aoctrl.com/api/mcp/products/3RW5235-2AC05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW5235-2AC05 soft starter, 68 A minimum, 200-600 V rated voltage, Class 10A/10E/20E trip class, PROFIBUS, Modbus RTU/TCP, EtherNet/IP, PROFINET, screw fixing, 306 x 185 x 203 mm.","salesMarkdown":"## Trip class and motor protection profile The 3RW5235-2AC05 ships with a default trip class of CLASS 10A per IEC 60947-4-2, with selectable CLASS 10E and CLASS 20E profiles. For a pump or conveyor with a normal starting duty cycle, 10A is the baseline — it clears the start within 10 seconds at 600% locked-rotor current. If you're starting a high-inertia load like a centrifuge or a large fan, bump it to 20E so the soft starter doesn't nuisance-trip during the acceleration ramp. The minimum load setting is 15% relative to the smallest settable Ie — meaning if you're running a motor that draws well below the 68 A minimum, the soft starter may not regulate properly. Keep the motor FLA at or above 68 A to stay in the control band. ## Fieldbus and control integration This SIRIUS soft starter carries onboard PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET — all five protocols are available without an add-on module. If your plant runs a mixed-protocol environment, you can commission the same unit across different network segments by swapping the parameter set. The analog output is configurable as 4-20 mA (default) or 0-10 V via the High Feature HMI parameter set. This gives the PLC a live current signal for trending motor load without a separate transducer. PROFIenergy is supported when used with the PROFINET communication module — useful for shutting down non-critical loads during idle periods in automotive or machining lines. ## Mounting, clearances, and thermal derating The unit measures 306 mm high, 185 mm wide, and 203 mm deep — screw-fixing mount, not DIN rail. You need 100 mm clearance above, 75 mm below, 10 mm forward, and 5 mm on each side. Zero clearance required at the rear, so you can push it against the back panel. If the panel ambient hits 50 °C, expect the continuous current rating to drop — plan your wire sizing and thermal management accordingly. Mounting position is flexible: vertical surface with ±90° rotation, and ±22.5° tilt forward/back. That helps when the sub-panel is angled inside the enclosure. ## Soft torque, pump ramp, and reset logic Soft Torque is enabled — this reduces the initial current spike on high-friction loads like conveyors with stuck rollers. Pump Ramp Down gives a controlled deceleration profile for centrifugal pumps, preventing water hammer on the discharge line. Auto-reset is standard, and a remote reset is available by cycling the 24 V control supply. If the starter trips on a fault, the PLC can toggle the control voltage to clear the trip without a site visit. Shock resistance is rated at 15 g / 11 ms, with potential contact lifting above 12 g / 11 ms — fine for most industrial panels, but if the machine sees repetitive hammering (stamping presses, rock crushers), consider adding vibration dampers. ## Compliance and documentation The 3RW5235-2AC05 carries CE marking, UL approval, and CSA approval — covering the three major regulatory jurisdictions for industrial control panels. Firmware updates are supported, and an error logbook is available with special accessories — useful for tracking repeated fault conditions on a critical motor. ## Sourcing and lifecycle status For a panel originally specified around a different soft starter (e.g., 6ED1052-1MD08-0BA1 or 6ES7517-3FP00-0AB0), this unit will not drop in without rewiring — the footprint, mounting, and control wiring differ. A panel re-spin is required.","metaTitle":"Siemens 3RW5235-2AC05 SIRIUS Soft Starter, 68 A, 200-600 V","metaDescription":"Siemens 3RW5235-2AC05 SIRIUS soft starter, 68 A minimum, 200-600 V, Class 10A/10E/20E trip, 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":"185 mm","title":"3RW5235-2AC05","Height":"306 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 (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 143 A, 24 V AC/DC spring-type terminals Analog output","CSA approval":"Yes","Remote Reset":"Yes; By turning off the control supply voltage","Analog Output":"Yes; 4 ... 20 mA (default) / 0 ... 10 V (parameterizable with High Feature HMI)","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":"248 A","at 50 °C rated value":"222 A","at 60 °C rated value":"204 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":"55 W","at 50 °C after startup":"50 W","at 60 °C after startup":"47 W","EMC emitted interference":"acc. to IEC 60947-4-2: Class A","For Main Current Circuit":"busbar connection","Number Of Analog Outputs":"1","Number Of Digital Inputs":"1","Weight Without Packaging":"6.6 kg","at 40 °C during startup":"2 127 W","at 50 °C during startup":"1 807 W","at 60 °C during startup":"1 605 W","For Control Circuit Solid":"2x (0.25 ... 1.5 mm²)","Motor Overload Protection":"Yes; 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":"37 kW","at 400 V at 40 °C rated value":"75 kW","at 500 V at 40 °C rated value":"90 kW","At Inside-Delta Circuit Minimum":"118 A","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","at 575/600 V at 50 °C rated value":"125 hp","of circuit breaker usable at 400 V":"3VA2220-7MN32-0AA0; 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":"1 800 V","Evaluation Of Thermistor Motor Protection":"No","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","for DIN cable lug for main contacts stranded":"2x (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","Holding Current In Bypass Operation Rated Value":"380 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 (25 ... 120 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","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 catalog","of the gG fuse usable at inside-delta circuit up to 500 V":"3NA3244-6; Type of coordination 1, Iq = 65 kA","of circuit breaker usable at 400 V at inside-delta circuit":"3VA2325-7MN32-0AA0; 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":"118 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 2":"126 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 3":"135 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 4":"144 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 5":"152 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 6":"161 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 7":"170 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 8":"178 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 9":"187 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 10":"196 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 11":"204 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 12":"213 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 13":"222 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 14":"230 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 15":"239 A","For Inside-Delta Circuit At Rotary Coding Switch On Switch Position 16":"248 A","of back-up R fuse link for semiconductor protection usable up to 690 V":"3NE3334-0B; 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":"3NE1227-0; 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/2ef5a9f3c2ca2b4cd2b5332cd981442a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=830601&mlfb=3RW5235-2AC05"},"ai":{"faq":[{"question":"What trip classes does the 3RW5235-2AC05 support?","answer":"The default trip class is CLASS 10A per IEC 60947-4-2, with selectable CLASS 10E and CLASS 20E profiles. Use 10A for normal starting duty, 10E for extended ramp times, and 20E for high-inertia loads."},{"question":"What fieldbus protocols does the 3RW5235-2AC05 support?","answer":"It supports PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET — all five are integrated without an add-on module."},{"question":"What are the clearance requirements for mounting the 3RW5235-2AC05?","answer":"You need 100 mm above, 75 mm below, 10 mm forward, and 5 mm on each side. Zero clearance at the rear."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW5235-2AC05","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/3RW5235-2AC05 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}}