{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4466-6BC46","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4466-6BC46","canonicalUrl":"https://aoctrl.com/siemens/3RW4466-6BC46","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4466-6BC46","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4466-6BC46 soft starter, 2103 A at 40 °C, 690 V insulation voltage, 50/60 Hz, integrated bypass, inside-delta circuit, screw fixing, 575 x 780 x 292 mm.","salesMarkdown":"## Panel fit and cooling clearance The 3RW4466-6BC46 measures 575 mm wide by 780 mm tall by 292 mm deep — a substantial frame that needs a backplate or sub-panel with the screw-fixing pattern laid out before the starter arrives. Siemens calls for 100 mm clearance above, 75 mm below, and 5 mm at the sides for natural convection cooling. Skimp on the vertical gap and the thyristor junction temperature climbs faster than the derating curve accounts for. ## Current derating and thermal limits That 20 % drop from 40 °C to 60 °C is the number to size against if the enclosure runs warm — the derating temperature threshold is 40 °C. Storage range is -25 to +80 °C; operation tops out at 60 °C ambient. Pollution degree 3 per IEC 60947-4-2 means the unit tolerates conductive dust and humidity typical of industrial control rooms — no derating for environment alone. ## Wiring and termination Main circuit power lands on busbar connections accepting 70–240 mm² stranded or 50–240 mm² finely stranded copper, or 2/0–500 kcmil. Maximum motor cable length is 500 m — beyond that, reflected-wave voltage stress on the motor winding becomes a risk even with the integrated bypass closed during run. ## Protection and control features Built-in motor overload protection and intrinsic device protection cover the thyristors and the bypass contactor. Adjustable current limitation lets you cap inrush below the full rated value — useful when starting into a loaded conveyor or pump. Minimum load is 8 % of rated current — below that the starter may not detect the load correctly. The display shows fault signals, and an external reset input allows remote clearing after a trip. The integrated bypass contact system closes after the start ramp, taking the thyristors out of the circuit for the run phase — cuts heat dissipation in the enclosure and improves efficiency. Inside-delta wiring is supported, which reduces the current through each thyristor pair to 58 % of the line current — useful for derating the semiconductor junction temperature on high-duty-cycle starts. A motor brake output component is included on this variant, saving an external contactor for brake control on holding-brake motors. ## Supply voltage and lifecycle Insulation voltage rated 690 V, covering 400 V and 480 V systems with headroom.","metaTitle":"Siemens 3RW4466-6BC46 SIRIUS Soft Starter, 2103 A, 690 V","metaDescription":"Siemens 3RW4466-6BC46 SIRIUS soft starter, 2103 A at 40 °C, 690 V insulation voltage, 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":"3RW4466-6BC46","Height":"780mm","Upwards":"100mm","Stranded":"70 ... 240 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 690 V, 40 °C standard: 1214 A, 1200 kW Inside-delta: only up to 600 V 400-690 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 ... 690V","at 690 V at standard circuit at 40 °C rated value":"1 200kW","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/3d79c323b6ba9295fd7557126e993cf6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=211261&mlfb=3RW4466-6BC46"},"ai":{"faq":[{"question":"What is the maximum motor cable length for the 3RW4466-6BC46?","answer":"Siemens specifies 500 m maximum wire length. Beyond that, reflected-wave overvoltage at the motor terminals can exceed the winding insulation rating, especially on 480 V systems."},{"question":"Does the 3RW4466-6BC46 support inside-delta wiring?","answer":"Yes, the inside-delta circuit is supported. This wiring method reduces the current through each thyristor pair to 58 % of the line current, lowering junction temperature rise during starts."},{"question":"What cooling clearances does the 3RW4466-6BC46 need?","answer":"Minimum 100 mm above, 75 mm below, and 5 mm at the sides. The vertical clearance is critical for natural convection through the heatsink — reducing it accelerates thyristor thermal wear."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4466-6BC46","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/3RW4466-6BC46 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}}