{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4047-1BB05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4047-1BB05","canonicalUrl":"https://aoctrl.com/siemens/3RW4047-1BB05","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4047-1BB05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4047-1BB05 soft starter, S3 frame size, 106 A at 40 °C, 50/60 Hz, screw-type terminals, motor overload protection, adjustable current limitation.","salesMarkdown":"## 106 A at 40 °C — the derating curve governs the real load The 3RW4047-1BB05: The 16 A drop across that 20 °C window means the panel ambient temperature — not the motor FLA — decides whether this frame holds the continuous current. At 50 °C the rating is 98 A; if the enclosure runs hot, step up a frame or add forced ventilation. Pollution degree 3 per IEC 60947-4-2 means it tolerates conductive dust and humidity typical of industrial panels — no derating for environment unless the enclosure is sealed and unventilated. ## Mounting and clearance — the panel layout constraints Dimensions are 170 mm high, 70 mm wide, 190 mm deep. The S3 footprint fits a standard DIN rail or screw-fixed backplate — the fastening method accepts both screw and snap-on mounting. Clearance above the unit is 60 mm, below 40 mm, and to the side 30 mm; those gaps are for airflow and busbar access, not optional. Mounting position rules depend on whether an additional fan is fitted. With the fan, the unit can be rotated ±90° on a vertical surface and tilted ±22.5° front-to-back. Without the fan, rotation is limited to ±10° and tilt to ±10°. If the panel layout forces an off-vertical orientation, budget for the fan option or accept the tighter envelope. ## Terminal capacity and motor cable reach Solid conductors are limited to 2.5 mm² — that is for control wiring, not the power loop. The maximum motor cable length is 300 m; beyond that, reflected-wave stress on the motor insulation becomes a consideration, even with a soft starter's ramp. ## Protection and control — built-in overload and current limit Motor overload protection is integrated, so no separate overload relay is needed in the power circuit. The adjustable current limitation sets the starting current ceiling as a percentage of the rated current — minimum load is 20%. The external reset input allows remote fault clearing, which keeps the starter in the control loop rather than requiring a panel walk. Intrinsic device protection covers the thyristors against overtemperature and phase imbalance. The derating temperature threshold is 40 °C — above that, the current values in the spec table are the binding limits. The lifecycle stage is current production. Sourced through authorized distribution; availability and volume pricing confirmed at RFQ against the BOM quantity.","metaTitle":"Siemens 3RW4047-1BB05 SIRIUS Soft Starter, 106 A, S3 Frame","metaDescription":"Siemens 3RW4047-1BB05 SIRIUS soft starter, 106 A at 40 °C, S3 frame. Active production. Screw terminals, motor overload protection, adjustable current limit.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"190mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"70mm","title":"3RW4047-1BB05","Height":"170mm","Upwards":"60mm","Stranded":"2x (10 ... 70 mm²)","Downwards":"40mm","Thyristors":"Yes","At The Side":"30mm","description":"SIRIUS soft starter S3 106 A, 75 kW/500 V, 40 °C 400-600 V AC, 24 V AC/DC Screw 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 50 Hz rated value":"24V","at 60 Hz rated value":"24V","at 40 °C rated value":"106A","at 50 °C rated value":"98A","at 60 °C rated value":"90A","For Auxiliary Contacts":"2x (20 ... 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)","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"red","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"screw-type 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","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":"No","at standard circuit at 40 °C rated value":"75kW","at standard circuit at 50 °C rated value":"75hp","control supply voltage 1 at DC rated value":"24V","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":"400 ... 600V","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%","For Auxiliary Contacts Finely Stranded With Core End Processing":"2x (20 ... 16)","relative negative tolerance of the control supply voltage at DC":"-20%","relative positive tolerance of the control supply voltage at DC":"20%","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":"$916.94","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f082922613044e997d607291bdc3eb76.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=480388&mlfb=3RW4047-1BB05"},"ai":{"faq":[{"question":"What is the maximum motor cable length for the 3RW4047-1BB05?","answer":"The maximum motor cable length is 300 m. Beyond that, reflected-wave stress on the motor insulation becomes a consideration even with a soft starter's ramp."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4047-1BB05","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/3RW4047-1BB05 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}}