{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4424-3BC36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4424-3BC36","canonicalUrl":"https://aoctrl.com/siemens/3RW4424-3BC36","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4424-3BC36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4424-3BC36 soft starter, 81 A at 40 °C, 690 V insulation voltage, 50/60 Hz, integrated bypass, inside-delta capable, screw fixing, 192 x 170 x 270 mm.","salesMarkdown":"## Panel fit and derating reality The 3RW4424-3BC36 occupies 192 mm height by 170 mm width by 270 mm depth, screw-fixed to the backplate — not DIN-rail snap-on, so budget four corner fasteners and a drill template. ## Wiring and termination Main power circuit uses box terminals accepting 2x (4... 50 mm²) stranded — that covers most motor cables up to 95 A class. Maximum motor cable length is 500 m — beyond that, capacitive charging current from the cable can interfere with the soft starter's firing circuit; keep runs under that for reliable starting. ## Motor protection and control features Built-in motor overload protection and intrinsic device protection mean no separate overload relay is needed for most applications — the soft starter handles thermal memory and fault lockout internally. Adjustable current limitation lets you cap starting current below the supply transformer or generator rating — set it as a percentage of the motor FLA, and the thyristors clip the current envelope. Minimum load is 8 % of the rated current — below that, the motor may not generate enough back-EMF for the soft starter to detect the end of start; light-load applications need a check against this threshold. ## Inside-delta and bypass — what they mean for the cabinet Inside-delta wiring (six-wire connection) reduces the current through each thyristor to 58 % of the line current — useful when the motor is far from the panel and cable sizing is tight, or when the soft starter's rating is marginal for the motor FLA. Integrated bypass contact system closes after the start ramp, taking the thyristors out of the circuit for steady-state running — this eliminates thyristor conduction losses and keeps the enclosure cooler during continuous duty.","metaTitle":"Siemens 3RW4424-3BC36 SIRIUS Soft Starter, 81 A, 690 V","metaDescription":"Siemens 3RW4424-3BC36 SIRIUS soft starter, rated 81 A at 40 °C, 690 V insulation voltage. Active production, quoted to order.","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":"3RW4424-3BC36","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 400-690 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 ... 690V","at 690 V at standard circuit at 40 °C rated value":"45kW","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/dfa45d9d2955c7aa9a085738c243cac4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=439721&mlfb=3RW4424-3BC36"},"ai":{"faq":[{"question":"Can the 3RW4424-3BC36 be wired in inside-delta configuration?","answer":"Yes, it supports inside-delta (six-wire) connection, which reduces thyristor current to 58 % of line current."},{"question":"What compliance documentation does Siemens provide for the 3RW4424-3BC36?","answer":"The soft starter is designed to IEC 60947-4-2, pollution degree 3, with an insulation voltage of 690 V. Standard Siemens documentation includes the declaration of conformity and CE marking; UL/CSA listing should be confirmed per the specific variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4424-3BC36","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/3RW4424-3BC36 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}}