{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4466-6BC34","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4466-6BC34","canonicalUrl":"https://aoctrl.com/siemens/3RW4466-6BC34","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4466-6BC34","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4466-6BC34 soft starter, 2103 A at 40 °C, 690 V insulation voltage, 50/60 Hz, integrated bypass, thyristor control, screw fixing.","salesMarkdown":"## Physical footprint and panel fit The 3RW4466-6BC34 measures 780 mm high by 575 mm wide by 292 mm deep — a substantial cabinet footprint that demands a dedicated backplate section, not a DIN-rail clip. Clearance zones are specified: 100 mm above, 75 mm below, and just 5 mm at the sides. The top clearance is the critical dimension for hot air exhaust from the thyristor stack — skimping on that 100 mm ceiling drives the unit into early thermal derating. ## Current ratings and thermal derating profile The 40 °C figure is the catalog rating; if the panel ambient runs hotter — common in a packed MCC lineup — the 60 °C derating to 1680 A is the number to size the motor branch circuit against. The derating temperature floor is 40 °C, meaning the full 2103 A is available only when the cooling air entering the unit stays at or below that point. Above 40 °C, the thyristor junction temperature limits the continuous current per the published steps. ## Power and control wiring terminals Main circuit connection is via busbar, with the cable terminal range accepting stranded 70–240 mm² and finely stranded 50–240 mm², plus AWG 2/0–500 kcmil for the main contacts. That covers everything from 2/0 feeder to 500 kcmil for the high-current path — no adapter lugs needed for the common industrial sizes. ## Protection and control features built in Motor overload protection, intrinsic device protection (thyristor overtemperature, phase imbalance), and adjustable current limitation are all integrated — no separate overload relay needed in the branch circuit. The minimum load is 8 % of the rated current, so it handles lightly loaded motors without dropping out. An integrated bypass contact system means the thyristors are shorted out once the motor reaches full speed, eliminating continuous conduction losses in the power semiconductors. The unit also includes a motor brake output and an external reset input for remote fault clearing. ## Environmental and compliance ratings Pollution degree 3 per IEC 60947-4-2 — suitable for industrial environments with conductive dust or occasional condensation. Insulation voltage rated 690 V, operating frequency 50–60 Hz. Storage temperature range -25 to +80 °C, with a 60 °C maximum during operation. The maximum motor cable length is 500 m — sufficient for most distributed motor installations without output reactors, though longer runs may require a dv/dt filter depending on the cable capacitance and the thyristor switching edge.","metaTitle":"Siemens 3RW4466-6BC34 SIRIUS Soft Starter, 2103 A, 690 V","metaDescription":"Siemens 3RW4466-6BC34 SIRIUS soft starter, rated 2103 A at 40 °C, 690 V insulation voltage. Active production, quoted to order.","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":"3RW4466-6BC34","Height":"780mm","Upwards":"100mm","Stranded":"70 ... 240 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 460 V, 50 °C standard: 1076 A, 950 hp Inside-delta: 1864 A, 1700 hp 200-460 V AC, 115 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":"115V","at 60 Hz rated value":"115V","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/4414d114b8b21f0193f9b8df3a630e60.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=361249&mlfb=3RW4466-6BC34"},"ai":{"faq":[{"question":"What is the maximum continuous current at 60 °C ambient?","answer":"At 60 °C ambient the unit is rated 1680 A continuous. The 2103 A catalog rating applies only at 40 °C; above that temperature the thyristor junction limits the output per the published derating step."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4466-6BC34","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/3RW4466-6BC34 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}}