{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4466-6BC35","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4466-6BC35","canonicalUrl":"https://aoctrl.com/siemens/3RW4466-6BC35","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4466-6BC35","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4466-6BC35 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":"## 2103 A at 40 °C — what that current rating means for your motor The 3RW4466-6BC35: This SIRIUS soft starter is rated 2103 A at 40 °C ambient. That's the continuous motor current it can handle in a standard industrial enclosure with the bypass closed — the thyristors are only in circuit during the start and stop ramp. At 50 °C the rating drops to 1864 A, and at 60 °C it's 1680 A. Operating frequency is 50/60 Hz, so it covers both line frequencies without a setting change. ## Integrated bypass and inside-delta wiring — what it saves you The integrated bypass contact system means once the motor is up to speed, the thyristors are shorted out. No external bypass contactor to buy, wire, or coordinate. That saves panel space and a couple of hours of wiring time. Inside-delta circuit capability lets you connect the soft starter in the delta legs of a six-lead motor. That drops the current through the thyristors to 58% of the line current — effectively letting a 2103 A unit handle a motor with a higher FLA than the nameplate suggests. Useful when you're pushing the limit on an existing starter frame. It also has an adjustable current limitation and a minimum load setting down to 8%, so it can start lightly loaded conveyors or pumps without the ramp overshooting. ## Panel fit — 575 mm wide, 780 mm tall, 292 mm deep The enclosure is 575 mm wide by 780 mm high by 292 mm deep. That's a substantial footprint — you're not squeezing this into a shallow wall-mount box. Plan for a floor-standing enclosure or a deep back panel. Mounting is screw fixing, not DIN rail, so you'll drill and tap the backplate. Mounting position is flexible: vertical surface, rotatable ±90°, and tiltable ±22.5° front/back. That helps when the enclosure layout forces an off-angle install — just keep the cooling airflow path clear. Clearance requirements: 100 mm above, 75 mm below, 5 mm at the sides. ## Main circuit wiring — busbar or big cable The main current circuit connection is busbar. For the cable option, the terminal accepts stranded 70–240 mm², finely stranded 50–240 mm², or AWG 2/0–500 kcmil. That's serious copper — plan your lug kit and torque wrench accordingly. ## Protection and diagnostics built in Motor overload protection and intrinsic device protection are onboard — you don't need a separate overload relay in the starter circuit. The fault signal has a display, so when it trips you get a code, not a blank stare. External reset lets you clear faults from a remote pushbutton or PLC output without opening the panel door. The thyristors handle the switching; no mechanical contacts to weld or pit during starts. Max motor cable length is 500 m — long enough for most plant-floor runs to the motor. Storage temperature range is -25 to +80 °C, operating ambient max 60 °C.","metaTitle":"Siemens 3RW4466-6BC35 SIRIUS Soft Starter, 2103 A at 40 °C","metaDescription":"Siemens 3RW4466-6BC35 SIRIUS soft starter, rated 2103 A at 40 °C. Active production, integrated bypass, inside-delta capable. Sourced to order against RFQ.","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":"3RW4466-6BC35","Height":"780mm","Upwards":"100mm","Stranded":"70 ... 240 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 575 V, 50 °C standard: 1076 A, 1200 hp Inside-delta: 1864 A, 2100 hp 400-600 V AC, 115 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":"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":"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/fc3837b9db97b95c574d5fb1ca283dec.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=299683&mlfb=3RW4466-6BC35"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4466-6BC35","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/3RW4466-6BC35 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}}