{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4424-3BC44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4424-3BC44","canonicalUrl":"https://aoctrl.com/siemens/3RW4424-3BC44","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4424-3BC44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS soft starter, 3RW4424-3BC44, 81 A at 40 °C, 230 V AC, 50/60 Hz, with integrated bypass and thyristors.","salesMarkdown":"The Siemens SIRIUS 3RW4424-3BC44 is a soft starter designed to ramp induction motors up to speed, reducing inrush current and mechanical shock. It is rated 81 A at 40 °C (73 A at 50 °C, 64 A at 60 °C) on a 230 V supply at 50/60 Hz, with an insulation voltage of 690 V. Built with thyristors and an integrated bypass contact system, it handles continuous motor current through the bypass once the motor is up to speed, reducing heat dissipation in the soft starter. Adjustable current limitation lets you set the starting current between 8% and 100% of the motor FLA. Above 40 °C, you must derate: 73 A at 50 °C, 64 A at 60 °C. If your panel ambient runs at 50 °C, size the motor load to 73 A or less. Minimum load is 8% of the rated current — so at 81 A, the soft starter will reliably control a motor drawing as little as 6.5 A. Below that, the thyristor firing angle may not be consistent. Motor overload protection is built in, and intrinsic device protection (over-temperature, phase imbalance) is standard. An external reset input allows remote fault clearing. The inside-delta circuit connection option is available — this reduces the soft starter current rating requirement to 58% of the motor FLA when wired in delta, useful for larger motors where the soft starter frame size would otherwise be larger. Dimensions: 192 mm high, 170 mm wide, 270 mm deep. Mounting is screw fixing on a vertical surface, rotatable ±90° and tiltable ±22.5° front-to-back. Clearance requirements: 100 mm above, 75 mm below, 5 mm at the sides for airflow. Main current circuit uses box terminals accepting stranded 2x (4... 50 mm²). Auxiliary and control circuits use spring-loaded terminals for 2x (0.25... 1.5 mm²) solid. Maximum motor cable length is 500 m. Storage temperature range is -25 to +80 °C; operation is rated to 60 °C ambient. The unit has a display for fault signals.","metaTitle":"Siemens 3RW4424-3BC44 SIRIUS Soft Starter, 81A, 230V","metaDescription":"Siemens SIRIUS 3RW4424-3BC44 soft starter, 81 A at 40 °C, 230 V, 50/60 Hz. Integrated bypass, thyristor-based, adjustable current limit. Current production. Sourced 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":"3RW4424-3BC44","Height":"192mm","Upwards":"100mm","Stranded":"2x (4 ... 50 mm²)","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 400 V, 40 °C standard: 47 A, 22 kW Inside-delta: 81 A, 45 kW 200-460 V AC, 230 V AC spring-type terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5524-3HA14<<","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":"230V","at 60 Hz rated value":"230V","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":"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%","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","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/aeff9050b1cc1b1b834283e9a7ff8210.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=16288&mlfb=3RW4424-3BC44"},"ai":{"faq":[{"question":"What are the key ratings I need to check for fit?","answer":"The headline rating is 81 A at 40 °C, 230 V, 50/60 Hz. Derate to 73 A at 50 °C and 64 A at 60 °C. Insulation voltage is 690 V. Minimum load is 8% of rated current."},{"question":"What are the physical dimensions and mounting requirements?","answer":"192 mm high, 170 mm wide, 270 mm deep. Screw fixing on a vertical surface. Allow 100 mm clearance above, 75 mm below, 5 mm at the sides."},{"question":"Does it have an integrated bypass?","answer":"Yes, the integrated bypass contact system carries the motor current once the motor is at full speed, reducing heat in the thyristors."},{"question":"What wire sizes does it accept?","answer":"Main circuit: box terminals for stranded 2x (4... 50 mm²). Auxiliary/control: spring-loaded terminals for solid 2x (0.25... 1.5 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4424-3BC44","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/3RW4424-3BC44 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}}