{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4047-2TB05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4047-2TB05","canonicalUrl":"https://aoctrl.com/siemens/3RW4047-2TB05","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4047-2TB05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4047-2TB05 soft starter, size S3, 106 A at 40 °C, 50-60 Hz, screw and snap-on DIN rail mounting, adjustable current limitation, integrated motor overload protection.","salesMarkdown":"## 106 A at 40 °C — derating and ambient limits The 3RW4047-2TB05: This derating profile means the continuous motor current must be checked against the enclosure ambient temperature — a panel running at 50 °C derates the unit by about 8 %. ## Screw terminals and wire ranges Main circuit connections use screw-type terminals accepting 2x (7... 1/0) AWG or 2x (10... 70 mm²) stranded. The clamping system accommodates both front and back entry, with a maximum motor cable length of 300 m. ## Mounting and clearance Fastening method is screw and snap-on mounting to DIN rail. Dimensions: 70 mm wide, 170 mm high, 190 mm deep. Clearance requirements: 60 mm upwards, 40 mm downwards, 30 mm at the side. With additional fan, the unit can be rotated ±90° on a vertical surface and tilted ±22.5° front/back; without fan, rotation and tilt are limited to ±10°. ## Protection and control features Integrated motor overload protection and intrinsic device protection are standard. Adjustable current limitation allows setting the starting current between 20 % and 100 % of the rated motor current. External reset is supported. Pollution degree 3 per IEC 60947-4-2 suits industrial environments with conductive contamination.","metaTitle":"Siemens 3RW4047-2TB05 SIRIUS Soft Starter, 106 A at 40 °C","metaDescription":"Siemens 3RW4047-2TB05 SIRIUS soft starter, size S3, rated 106 A at 40 °C, 50-60 Hz. Active production, screw and snap-on DIN rail mount.","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":"3RW4047-2TB05","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 spring-type terminals Thermistor motor protection","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":"Yes","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%","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e8d7412ebbe3ce2e367114c17b8e4c6e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=70422&mlfb=3RW4047-2TB05"},"ai":{"faq":[{"question":"What is the rated current of 3RW4047-2TB05 at 40 °C?","answer":"This is the continuous motor current capacity for the SIRIUS S3 frame size."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4047-2TB05","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/3RW4047-2TB05 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}}