{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4424-3BC35","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4424-3BC35","canonicalUrl":"https://aoctrl.com/siemens/3RW4424-3BC35","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4424-3BC35","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4424-3BC35 soft starter, 81 A at 40 °C, 115 V AC coil 50/60 Hz, integrated bypass, screw fixing, 170 x 192 x 270 mm.","salesMarkdown":"## 81 A at 40 °C, derated to 64 A at 60 °C The 3RW4424-3BC35: The derating curve matters if this lives in a hot panel — a 40 °C enclosure interior is optimistic in a Gulf Coast summer. The integrated bypass contact system pulls the thyristors out of circuit after start, which cuts heat generation during run and keeps the enclosure rise lower than a non-bypassed starter. Minimum load is 8 % of rated current — below that, the motor current may drop below the thyristor holding current and the starter drops out. Check the motor no-load amps against this threshold. ## Panel fit and wiring — 170 x 192 x 270 mm Envelope is 170 mm wide, 192 mm high, 270 mm deep — screw fixing, not DIN-rail snap-on. The depth is the dimension that surprises panel builders: 270 mm means the back of the enclosure needs clearance for the body plus the 100 mm upward and 75 mm downward bending radius for the power cables. Side clearance is only 5 mm, so adjacent devices can sit tight. Main circuit uses box terminals accepting 2x (4... 50 mm²) stranded or 2x (10... 1/0 AWG). The control coil is 115 V at 50/60 Hz — confirm the control transformer taps. ## Inside-delta wiring and adjustable current limit Supports inside-delta connection, which lets a smaller-frame starter handle a given motor FLA by wiring the thyristors in the delta legs rather than the line. Adjustable current limitation sets the start current ceiling as a percentage of the starter's rated current — useful for soft-starting conveyors or pumps that can't take a full-voltage kick. Motor overload protection and intrinsic device protection are both onboard. External reset allows remote fault clearing.","metaTitle":"Siemens 3RW4424-3BC35 SIRIUS Soft Starter, 81A, 115V Coil","metaDescription":"Siemens 3RW4424-3BC35 SIRIUS soft starter, 81A at 40°C, 115V coil, integrated bypass. Active production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"270mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"170mm","title":"3RW4424-3BC35","Height":"192mm","Upwards":"100mm","Stranded":"2x (4 ... 50 mm²)","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 575 V, 50 °C standard: 42 A, 30 hp Inside-delta: 73 A, 60 hp 400-600 V AC, 115 V AC spring-type terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5524-3HA16<<","During Storage":"-25 ... +80°C","External Reset":"Yes","lifecycle_stage":"current","During Operation":"60°C","Fastening Method":"screw fixing","Minimum Load [%]":"8%","Mounting Position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back","Product Brand Name":"SIRIUS","Degree Of Pollution":"3, acc. to IEC 60947-4-2","Product Designation":"Soft starter","Wire Length Maximum":"500m","Derating Temperature":"40°C","Inside-Delta Circuit":"Yes","at 50 Hz rated value":"115V","at 60 Hz rated value":"115V","at 40 °C rated value":"81A","at 50 °C rated value":"73A","at 60 °C rated value":"64A","For Auxiliary Contacts":"2x (24 ... 16)","For Main Current Circuit":"box terminal","Motor Overload Protection":"Yes","Using Both Clamping Points":"2x (10 ... 1/0)","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Using The Back Clamping Point":"10 ... 2/0","Insulation Voltage Rated Value":"690V","Using The Front Clamping Point":"10 ... 2/0","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"Display","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Component Motor Brake Output":"Yes","during storage according to IEC 60721":"1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4","reference code according to EN 61346-2":"Q","during operation according to IEC 60721":"3K6 (no formation of ice, no 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)","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Evaluation Of Thermistor Motor Protection":"Yes","at standard circuit at 40 °C rated value":"30kW","at standard circuit at 50 °C rated value":"30hp","Finely Stranded Without Core End Processing":"2x (4 ... 35 mm²)","number of CO contacts for auxiliary contacts":"1","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"3","Type Of Voltage Of The Control Supply Voltage":"AC","at inside-delta circuit at 40 °C rated value":"45kW","at inside-delta circuit at 50 °C rated value":"60hp","Control Supply Voltage Frequency 1 Rated Value":"50Hz","Control Supply Voltage Frequency 2 Rated Value":"60Hz","Installation Altitude At Height Above Sea Level":"5 000m","continuous operating current [% of Ie] at 40 °C":"115%","Operating Voltage At Standard Circuit Rated Value":"400 ... 600V","contact rating of auxiliary contacts according to UL":"B300 / R300","Operating Voltage At Inside-Delta Circuit Rated Value":"400 ... 600V","Relative Negative Tolerance Of The Operating Frequency":"-10%","Relative Positive Tolerance Of The Operating Frequency":"10%","Relative Negative Tolerance Of The Control Supply Voltage Frequency":"-10%","Relative Positive Tolerance Of The Control Supply Voltage Frequency":"10%","Relative Negative Tolerance Of The Operating Voltage At Standard Circuit":"-15%","Relative Positive Tolerance Of The Operating Voltage At Standard Circuit":"10%","power loss [W] at operational current at 40 °C during operation typical":"32W","relative negative tolerance of the control supply voltage at AC at 50 Hz":"-15%","relative negative tolerance of the control supply voltage at AC at 60 Hz":"-15%","relative positive tolerance of the control supply voltage at AC at 50 Hz":"10%","relative positive tolerance of the control supply voltage at AC at 60 Hz":"10%","Adjustable Motor Current For Motor Overload Protection Minimum Rated Value":"9A","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":"$3,360.42","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/686746a30668dceca01b83fc3c467228.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=276871&mlfb=3RW4424-3BC35"},"ai":{"faq":[{"question":"What is the 3RW4424-3BC35's depth and mounting method?","answer":"Depth is 270 mm. Mounting is screw fixing — not DIN-rail snap-on. The mounting position allows vertical surface with +/-90° rotation and +/-22.5° tilt front-to-back."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4424-3BC35","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/3RW4424-3BC35 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}}