{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4424-1BC34","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4424-1BC34","canonicalUrl":"https://aoctrl.com/siemens/3RW4424-1BC34","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4424-1BC34","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4424-1BC34 soft starter, 81 A (40 °C), 690 V insulation voltage, 115 V control supply, integrated bypass, screw fixing.","salesMarkdown":"The Siemens 3RW4424-1BC34 is a SIRIUS soft starter — thyristor-based motor starting that ramps voltage to limit inrush current and mechanical shock on pumps, conveyors, fans, and compressors. Rated 81 A at 40 °C (73 A at 50 °C, 64 A at 60 °C), it handles motors up to that full-load current on a 400 V three-phase system. The 690 V insulation voltage (rated impulse withstand per IEC 60947-4-2, pollution degree 3) means it's built for industrial panels where line transients are a given. Control supply is 115 V at 50/60 Hz — a common voltage for North American and some European control transformers. The integrated bypass contact system shunts the thyristors after start, so the power semiconductors aren't carrying continuous load current; that cuts heat dissipation inside the panel and extends device life. Adjustable current limitation and motor overload protection are built in, meaning you don't need a separate overload relay for most applications. Screw fixing to a vertical mounting surface — no DIN-rail clip on this frame size. Dimensions: 170 mm wide, 192 mm high, 270 mm deep. Clearance requirements: 100 mm above, 75 mm below, 5 mm at the sides — that 5 mm side gap is tight; adjacent devices or cable ducts need to respect it for airflow and arc flash containment. Main circuit terminals are box lugs accepting 2x (4...50 mm²) stranded or 2x (10...1/0 AWG) using both clamping points. Auxiliary and control circuit wiring uses screw-type terminals for 2x (0.5...2.5 mm²) solid or 2x (20...14 AWG). Maximum motor cable length is 500 m — sufficient for most distributed motor installations, but watch for capacitive charging current on long runs that could cause nuisance tripping of the overload protection. Above 40 °C, derate linearly to 73 A at 50 °C and 64 A at 60 °C. If your panel ambient hits 50 °C, you lose about 10% of the rated capacity — factor that into motor selection or consider a larger frame. External reset allows remote fault clearing without opening the panel door. Display version for fault signal shows diagnostic codes locally. Intrinsic device protection covers overtemperature and phase-loss internally — no separate thermistor relay needed for the soft starter itself.","metaTitle":"Siemens 3RW4424-1BC34 SIRIUS Soft Starter, 81A, 115V Control","metaDescription":"Siemens 3RW4424-1BC34 SIRIUS soft starter, 81A rated at 40°C, 690V insulation voltage, integrated bypass, thyristor control. Active production. Source to RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"270mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"170mm","title":"3RW4424-1BC34","Height":"192mm","Upwards":"100mm","Stranded":"2x (4 ... 50 mm²)","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 460 V, 50 °C standard: 42 A, 25 hp Inside-delta: 73 A, 50 hp 200-460 V AC, 115 V AC Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5524-1HA14<<","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 (20 ... 14)","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":"screw-type 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 (0.5 ... 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":"22kW","at standard circuit at 50 °C rated value":"25hp","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":"50hp","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":"200 ... 460V","contact rating of auxiliary contacts according to UL":"B300 / R300","Operating Voltage At Inside-Delta Circuit Rated Value":"200 ... 460V","Relative Negative Tolerance Of The Operating Frequency":"-10%","Relative Positive Tolerance Of The Operating Frequency":"10%","For Auxiliary Contacts Finely Stranded With Core End Processing":"2x (20 ... 16)","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":"$1,869.00 – $2,922.27","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a70fd90bbe41ff1f78e215b55f96898e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=33298&mlfb=3RW4424-1BC34"},"ai":{"faq":[{"question":"What control voltage does this soft starter need?","answer":"115 V at 50/60 Hz — a standard control supply for many industrial panels. The control circuit uses screw-type terminals for 2x (0.5...2.5 mm²) solid wire."},{"question":"Does it have an integrated bypass contactor?","answer":"Yes, the integrated bypass contact system shunts the thyristors after the motor reaches full speed, so the power semiconductors don't carry continuous load current. This reduces heat and extends service life."},{"question":"What are the mounting dimensions and clearances?","answer":"170 mm wide, 192 mm high, 270 mm deep. Screw fixing to a vertical surface. Required clearances: 100 mm above, 75 mm below, 5 mm at the sides. The mounting position allows +/-90° rotation and +/-22.5° tilt."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4424-1BC34","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/3RW4424-1BC34 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}}