{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4047-2BB14","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4047-2BB14","canonicalUrl":"https://aoctrl.com/siemens/3RW4047-2BB14","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4047-2BB14","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4047-2BB14 soft starter, Size S3, 106 A at 40 °C, 110–230 VDC control supply, screw terminals, thyristor-based, active production.","salesMarkdown":"## What the 106 A rating means for a motor load That figure is the full-load current it can handle continuously in a standard panel — enough for a 55 kW motor at 400 V three-phase, assuming a typical service factor. The control supply is 110–230 VDC; the operating frequency is 50/60 Hz. ## Integration: panel fit and wiring Mounts on DIN rail or with screws — the fastening method supports both screw and snap-on mounting. The main current circuit uses screw-type terminals; the stranded wire range is 2x (10–70 mm²) and solid wire 2x (0.25–2.5 mm²). For auxiliary contacts the AWG range is 2x (24–14). Minimum load is 20 %, meaning the soft starter needs at least that much motor current to regulate properly — don't use it on a motor that draws less than about 21 A. The maximum motor cable length is 300 m, which covers most industrial runs.","metaTitle":"Siemens 3RW4047-2BB14 SIRIUS Soft Starter, 106A at 40°C","metaDescription":"Siemens 3RW4047-2BB14 SIRIUS soft starter, 106 A rated at 40 °C, 110–230 VDC control supply. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"190mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"70mm","title":"3RW4047-2BB14","Height":"170mm","Upwards":"60mm","Stranded":"2x (10 ... 70 mm²)","Downwards":"40mm","Thyristors":"Yes","At The Side":"30mm","description":"SIRIUS soft starter S3 106 A, 55 kW/400 V, 40 °C 200-480 V AC, 110-230 V AC/DC spring-type terminals","During Storage":"-40 ... +80°C","External Reset":"Yes","Finely Stranded":"2 x (10 ... 50 mm²)","lifecycle_stage":"current","During Operation":"-25 ... +60°C","Fastening Method":"screw and snap-on mounting","Minimum Load [%]":"20%","For Main Contacts":"2x (7 ... 1/0)","Mounting Position":"With additional fan: With vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back Without additional fan: With vertical mounting surface +/-10° rotatable, with vertical mounting surface +/- 10° t","Product Brand Name":"SIRIUS","Degree Of Pollution":"3, acc. to IEC 60947-4-2","Product Designation":"Soft starter","Wire Length Maximum":"300m","Derating Temperature":"40°C","Inside-Delta Circuit":"No","at 40 °C rated value":"106A","at 50 °C rated value":"98A","at 60 °C rated value":"90A","For Auxiliary Contacts":"2x (24 ... 14)","For Main Current Circuit":"screw-type terminals","Motor Overload Protection":"Yes","Using Both Clamping Points":"10 ... 2/0","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Size Of Engine Control Device":"S3","Using The Back Clamping Point":"2x (10 ... 1/0)","Insulation Voltage Rated Value":"600V","Using The Front Clamping Point":"2x (10 ... 1/0)","control supply voltage 1 at DC":"110 ... 230V","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"red","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Component Motor Brake Output":"No","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","control supply voltage 1 at AC at 50 Hz":"110 ... 230V","control supply voltage 1 at AC at 60 Hz":"110 ... 230V","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":"No","at standard circuit at 40 °C rated value":"55kW","at standard circuit at 50 °C rated value":"75hp","number of CO contacts for auxiliary contacts":"1","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"AC/DC","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 ... 480V","contact rating of auxiliary contacts according to UL":"B300 / R300","Relative Negative Tolerance Of The Operating Frequency":"-10%","Relative Positive Tolerance Of The Operating Frequency":"10%","relative negative tolerance of the control supply voltage at DC":"-15%","relative positive tolerance of the control supply voltage at DC":"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":"21W","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":"46A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$805.18","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/328095340d5d30c81cfd0960ba5a45fb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=114435&mlfb=3RW4047-2BB14"},"ai":{"faq":[{"question":"Is 3RW4047-2BB14 compatible with a 55kW motor at 400V?","answer":"Yes, the 106 A rating at 40 °C is sufficient for a 55 kW motor at 400 V three-phase, assuming typical full-load current around 104 A. Derate to 98 A at 50 °C or 90 A at 60 °C if the ambient is higher."},{"question":"Where can I buy 3RW4047-2BB14 as a distributor?","answer":"The 3RW4047-2BB14 is sourced to order through independent distribution. Submit an RFQ for current pricing and availability — stock and lead time are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4047-2BB14","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/3RW4047-2BB14 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}}