{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4466-6BC45","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4466-6BC45","canonicalUrl":"https://aoctrl.com/siemens/3RW4466-6BC45","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4466-6BC45","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4466-6BC45 soft starter, 2103 A at 40 °C, 690 V insulation voltage, integrated bypass contactor, inside-delta circuit capable, screw fixing mount.","salesMarkdown":"## Current rating and thermal derating — what the numbers mean for your motor The 3RW4466-6BC45 is rated 2103 A at 40 °C ambient. That current drops to 1864 A at 50 °C and 1680 A at 60 °C. If your panel ambient runs above 40 °C, the motor full-load current must stay under the derated figure — the thyristor junction temperature is the limit, not the nameplate. The operating frequency is 50/60 Hz, so it works on either line frequency without derating. ## Panel fit — dimensions, cable terminations, and mounting The unit measures 780 mm high by 575 mm wide by 292 mm deep. That is a substantial footprint — plan the gland plate and busbar routing before the panel layout is frozen. Mounting is screw fixing, not DIN rail; the mounting position allows vertical surface with +/-90° rotation and +/-22.5° tilt forward/back. Main circuit cable termination accepts stranded 70–240 mm² and finely stranded 50–240 mm², plus AWG 2/0–500 kcmil. The main current circuit uses busbar connection; auxiliary and control circuits use screw-type terminals. ## Integrated protection and bypass — what is built in and what you still need Motor overload protection, intrinsic device protection, and adjustable current limitation are all onboard. The integrated bypass contactor means the thyristors are shorted out after start — no continuous heat sink loss, which is why the enclosure can be smaller than a full SCR stack. Minimum load is 8 %, so it handles lightly loaded motors without dropping out. The inside-delta circuit capability allows the soft starter to be wired in the motor delta loop, reducing the current through each thyristor leg to 58 % of line current — useful for retrofitting into existing delta-wound motors without re-cabling the main power path.","metaTitle":"Siemens 3RW4466-6BC45 SIRIUS Soft Starter, 2103 A at 40 °C","metaDescription":"Siemens 3RW4466-6BC45 SIRIUS soft starter, 2103 A at 40 °C, 690 V insulation, integrated bypass. Active production, quoted to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"292mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"575mm","title":"3RW4466-6BC45","Height":"780mm","Upwards":"100mm","Stranded":"70 ... 240 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 500 V, 40 °C standard: 1214 A, 900 kW Inside-delta: 2103 A, 1500 kW 400-600 V AC, 230 V AC Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5558-6HA16<<","During Storage":"-25 ... +80°C","External Reset":"Yes","Finely Stranded":"50 ... 240 mm²","lifecycle_stage":"current","During Operation":"60°C","Fastening Method":"screw fixing","Minimum Load [%]":"8%","For Main Contacts":"2/0 ... 500 kcmil","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":"2 103A","at 50 °C rated value":"1 864A","at 60 °C rated value":"1 680A","For Auxiliary Contacts":"2x (20 ... 14)","For Main Current Circuit":"busbar connection","Motor Overload Protection":"Yes","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Insulation Voltage Rated Value":"690V","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"Display","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"screw-type 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 (0.5 ... 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":"900kW","at standard circuit at 50 °C rated value":"1 200hp","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":"1 500kW","at inside-delta circuit at 50 °C rated value":"2 100hp","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","Operating Voltage At Inside-Delta Circuit Rated Value":"400 ... 600V","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 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":"630W","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":"242A","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6603dacd4e71343b4d182e4fcf4cfcab.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=256003&mlfb=3RW4466-6BC45"},"ai":{"faq":[{"question":"What is 3RW4466-6BC45's listed depth?","answer":"The depth is 292 mm. Overall dimensions are 780 mm high by 575 mm wide by 292 mm deep."},{"question":"What compliance documentation does Siemens provide for 3RW4466-6BC45?","answer":"The product carries a pollution degree 3 rating per IEC 60947-4-2. The evidence does not list RoHS, REACH, UL, or other specific compliance certificates; those are typically available in the Siemens Industry Online Support download area under the product documentation tab."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4466-6BC45","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/3RW4466-6BC45 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}}