{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4466-2BC45","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4466-2BC45","canonicalUrl":"https://aoctrl.com/siemens/3RW4466-2BC45","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4466-2BC45","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4466-2BC45 soft starter, 2103 A at 40 °C, 690 V insulation voltage, 50/60 Hz, integrated bypass, inside-delta circuit, screw fixing, 780 x 575 x 292 mm.","salesMarkdown":"## 2103 A at 40 °C — the thermal ceiling for continuous duty The 3RW4466-2BC45: For a panel that runs at 50 °C, budget 1864 A as the hard ceiling for the motor full-load current. The integrated bypass contact system eliminates the need for an external bypass contactor once the motor is at speed. This saves panel space and reduces the heat load from the thyristors during run — the bypass carries the steady-state current, not the semiconductors. ## Inside-delta wiring and motor protection The unit supports inside-delta circuit configuration, which reduces the current through each soft starter phase to 58 % of the line current. For a given motor FLA, this lets you select a smaller-frame soft starter than a standard in-line connection would allow — a meaningful cost and space saving on high-current installations. Motor overload protection and intrinsic device protection are built in, with an adjustable current limitation. The minimum load setting is 8 %, so it handles lightly loaded motors without nuisance tripping. The external reset input allows remote fault clearing from a PLC or pushbutton station. The insulation voltage is rated 690 V, and the pollution degree is 3 per IEC 60947-4-2 — suitable for industrial environments with conductive dust or condensation. ## Panel integration — footprint and wiring The enclosure measures 780 mm high, 575 mm wide, and 292 mm deep. It mounts via screw fixing with a vertical mounting surface, rotatable ±90° and tiltable ±22.5° front-to-back. Clearance requirements: 100 mm upwards, 75 mm downwards, 5 mm at the sides. Main circuit connection uses busbar with stranded cable 70–240 mm², finely stranded 50–240 mm², or solid 2/0–500 kcmil. Maximum motor cable length is 500 m.","metaTitle":"Siemens 3RW4466-2BC45 SIRIUS Soft Starter, 2103 A at 40 °C","metaDescription":"Siemens 3RW4466-2BC45 SIRIUS soft starter, 2103 A at 40 °C, integrated bypass, inside-delta circuit. 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 (0.25 ... 1.5 mm²)","Width":"575mm","title":"3RW4466-2BC45","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 spring-type terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5558-2HA16<<","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 (24 ... 16)","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":"spring-loaded 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 (0.25 ... 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":"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%","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/7b6d177dc3499484f371f378a1317273.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=343247&mlfb=3RW4466-2BC45"},"ai":{"faq":[{"question":"What is the maximum continuous current at 40 °C for the 3RW4466-2BC45?","answer":"The soft starter is rated 2103 A at 40 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4466-2BC45","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/3RW4466-2BC45 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}}