{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4047-2BB04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4047-2BB04","canonicalUrl":"https://aoctrl.com/siemens/3RW4047-2BB04","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4047-2BB04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4047-2BB04 soft starter, Size S3, 106 A at 40 °C, 24 V AC/DC control voltage, screw-type terminals, thyristor-based motor overload protection.","salesMarkdown":"## Rated current and thermal derating — 106 A at 40 °C The 3RW4047-2BB04: This derating curve sets the usable motor FLA for a given enclosure temperature — at 50 °C ambient, a 98 A motor is the ceiling, not 106 A. The control circuit is 24 V AC/DC, 50/60 Hz, with a 20% minimum load requirement — below that, the thyristor firing angle may not maintain conduction. ## Mounting and panel integration — Size S3, screw and snap-on Size S3 frame: 170 mm high, 70 mm wide, 190 mm deep. Fastening method is screw and snap-on mounting to DIN rail. Clearance requirements: 60 mm upwards, 40 mm downwards, 30 mm at the side — these are the minimum air gaps for heat dissipation and wiring access. Mounting position is flexible: with an additional fan, the unit can be mounted on a vertical surface with +/-90° rotation and +/-22.5° tilt front/back. Without the fan, the envelope tightens to +/-10° rotation and +/-10° tilt. The derating temperature threshold is 40 °C — above that, the current ratings in the spec table apply. ## Terminal capacity and wiring — screw-type, dual clamping points Main circuit terminals accept stranded wire 2x (10... 70 mm²) and finely stranded 2x (10... 50 mm²). Both front and back clamping points accept 2x (10... 1/0) AWG; using both clamping points together accepts 10... 2/0 AWG. Maximum wire length to the motor is 300 m. The insulation voltage is rated 600 V, with pollution degree 3 per IEC 60947-4-2. This means the unit is designed for industrial environments where conductive pollution or dry non-conductive pollution that becomes conductive due to condensation is expected. ## Motor protection and control features Built-in motor overload protection and intrinsic device protection are standard. Adjustable current limitation allows setting the starting current below the locked-rotor value. An external reset input is provided for remote fault recovery. The soft starter does not support inside-delta circuit configuration — it is a standard in-line connection. The SIRIUS brand designation and Size S3 frame are consistent across the 3RW40 series for this rating class.","metaTitle":"Siemens 3RW4047-2BB04 SIRIUS Soft Starter, 106 A","metaDescription":"Siemens 3RW4047-2BB04 SIRIUS soft starter, 106 A at 40 °C, 24 V AC/DC control, Size S3. 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":"3RW4047-2BB04","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, 24 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 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 (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)","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","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","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":"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":"-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":"$805.18","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/798320646d5fe3707d3826b419246401.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=344030&mlfb=3RW4047-2BB04"},"ai":{"faq":[{"question":"What is the rated current of 3RW4047-2BB04 at different temperatures?","answer":"These values set the maximum motor FLA for the given enclosure ambient temperature."},{"question":"What control voltage does 3RW4047-2BB04 require?","answer":"The control circuit operates at 24 V AC/DC, 50/60 Hz. The minimum load requirement is 20% — below this threshold the thyristor firing angle may not maintain proper conduction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4047-2BB04","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/3RW4047-2BB04 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}}