{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4466-6BC44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4466-6BC44","canonicalUrl":"https://aoctrl.com/siemens/3RW4466-6BC44","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4466-6BC44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4466-6BC44 soft starter, 2103 A at 40 °C, 690 V insulation voltage, 50/60 Hz, integrated bypass contact system, inside-delta circuit, screw-type terminals, IP00, 575 x 780 x 292 mm.","salesMarkdown":"## Integrated bypass and inside-delta wiring — two features that change the install The 3RW4466-6BC44: The integrated bypass contact system shorts the thyristors after the motor reaches full speed, eliminating the 1-2 V forward drop per device and the associated heat load — the soft starter runs cool in bypass mode, so the enclosure ventilation requirement drops. Inside-delta circuit wiring connects the soft starter in the delta legs of a six-lead motor, reducing the current per phase to 58% of the line current — a 2103 A line-rated unit in inside-delta handles a motor up to about 3600 A full-load current, effectively stepping the frame size down one bracket. Adjustable current limitation sets the start current between 0 and 100% of the rated current — paired with the minimum load of 8%, this covers light-load starts on conveyors through high-inertia fans without a separate current-limiting reactor. ## Mounting, clearance, and termination — what fits in the panel Dimensions are 575 mm wide x 780 mm high x 292 mm deep — the depth is the critical dimension for shallow back-panel enclosures. Mounting is screw-fixing with a vertical mounting surface, rotatable ±90° and tiltable ±22.5° front/back, so the unit can be oriented to match existing busbar runs. Clearance requirements: 100 mm upwards, 75 mm downwards, 5 mm at the sides — the tight side clearance allows adjacent units to be packed closely, but the vertical clearance must be maintained for airflow through the heatsink fins. Main current circuit termination is busbar connection accepting 2/0 to 500 kcmil or stranded 70-240 mm² and finely stranded 50-240 mm². Auxiliary and control circuits use screw-type terminals for 2x (20-14 AWG) and solid 2x (0.5-2.5 mm²). ## Protection, diagnostics, and auxiliary functions A display for fault signals provides on-unit diagnostics — the display shows the last fault code, which speeds troubleshooting on a line-down event without needing a laptop. External reset input allows remote clearing of a tripped fault condition from a PLC or pushbutton station. A motor brake output is included for motors with DC injection brakes, saving a separate brake contactor. Maximum motor cable length is 500 m — for runs longer than that, output dV/dt filters or a sine-wave filter should be considered to prevent reflected-wave voltage spikes from damaging the motor winding insulation. The kit includes the soft starter unit; confirm the busbar kit and any external bypass contactor if the application requires a separate bypass path.","metaTitle":"Siemens 3RW4466-6BC44 SIRIUS Soft Starter, 2103 A, 690 V","metaDescription":"Siemens 3RW4466-6BC44 SIRIUS soft starter, rated 2103 A at 40°C, 690 V insulation voltage. Active production, integrated bypass, inside-delta capable.","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":"3RW4466-6BC44","Height":"780mm","Upwards":"100mm","Stranded":"70 ... 240 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 400 V, 40 °C standard: 1214 A, 710 kW Inside-delta: 2103 A, 1200 kW 200-460 V AC, 230 V AC Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5558-6HA14<<","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":"710kW","at standard circuit at 50 °C rated value":"950hp","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 200kW","at inside-delta circuit at 50 °C rated value":"1 700hp","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 ... 460V","contact rating of auxiliary contacts according to UL":"B300 / R300","Operating Voltage At Inside-Delta Circuit Rated Value":"200 ... 460V","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/aeea24a3f5fbf25cf01a0872fa3afda2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=318076&mlfb=3RW4466-6BC44"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 3RW4466-6BC44?","answer":"The soft starter is designed to IEC 60947-4-2 (pollution degree 3) and carries the SIRIUS brand. Standard documentation includes a CE declaration of conformity, the product manual, and a dimension drawing. RoHS and REACH compliance is standard for current-production Siemens SIRIUS components — request the specific declaration at RFQ if your compliance audit requires it."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4466-6BC44","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/3RW4466-6BC44 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}}