{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4466-2BC34","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4466-2BC34","canonicalUrl":"https://aoctrl.com/siemens/3RW4466-2BC34","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4466-2BC34","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4466-2BC34 soft starter, 2103 A at 40 °C, 690 V insulation voltage, integrated bypass contactor, inside-delta circuit capable, 780 x 575 x 292 mm.","salesMarkdown":"## 2103 A at 40 °C — sizing this soft starter for the motor The 3RW4466-2BC34: The headline rating is 2103 A at 40 °C ambient, which sets the maximum motor full-load current this unit can start and run through the bypass. Derate to 1864 A at 50 °C and 1680 A at 60 °C — if the panel ambient runs hot, the usable motor size drops accordingly. The operating frequency covers 50 to 60 Hz with a single control supply voltage of 115 V at both frequencies — one transformer covers the control circuit regardless of line frequency. Minimum load is 8 % of the rated current — useful if you're starting an unloaded conveyor or pump with low breakaway torque; the soft starter won't trip on undercurrent during the start ramp. ## Integrated bypass — what it saves in the panel The integrated bypass contactor means you don't add a separate bypass contactor and wire it across the soft starter. That saves a mounting footprint, control wiring, and a coil driver output in the PLC. The bypass carries the full motor current once the start ramp completes, taking the heat off the thyristors. Inside-delta circuit wiring is supported — if the motor has six leads accessible, wiring the soft starter in the delta legs reduces the current the unit sees by a factor of 1.73. That lets a smaller-frame soft starter handle a given motor, but the motor must be six-lead accessible and the starter configured for inside-delta operation. Main circuit connections accept busbar, cable lugs from 70 to 240 mm² stranded or 50 to 240 mm² finely stranded, and 2/0 to 500 kcmil for North American installations. The auxiliary and control circuit terminals are spring-loaded — strip, push, done, no torque driver needed. ## Mounting and environment — where this unit fits Dimensions are 780 mm high by 575 mm wide by 292 mm deep — this is a large-frame soft starter, not a panel-board component. Mounting is screw-fixed to a vertical surface, with ±90° rotation and ±22.5° tilt front-to-back allowed. Plan the enclosure depth to clear the 292 mm plus the 100 mm upward and 75 mm downward clearance for ventilation. Pollution degree 3 per IEC 60947-4-2 means it's rated for industrial environments where conductive dust or occasional condensation occurs — no need for a filtered enclosure in most factory-floor settings. Operating temperature range is 60 °C max during operation, storage from -25 to +80 °C. Maximum motor cable length is 500 m — if the motor is far from the starter, keep the cable run under that limit to avoid reflected-wave voltage spikes that can stress the motor insulation. ## Protection and control features Motor overload protection is built in, along with intrinsic device protection — the soft starter monitors its own thyristor temperature and current, so it can shut down before damaging itself. Adjustable current limitation lets you set the start current between the minimum load threshold and the unit's full rating, useful for limiting inrush on weak supply lines or protecting driven equipment. External reset input is present, and the display shows fault signals — no need to carry a laptop to read the last trip cause. A motor brake output is included as a product component, which simplifies wiring for applications that need a DC injection brake after the stop ramp.","metaTitle":"Siemens 3RW4466-2BC34 Soft Starter, 2103 A, 690 V, SIRIUS","metaDescription":"Siemens SIRIUS 3RW4466-2BC34 soft starter, 2103 A at 40 °C, 690 V insulation, integrated bypass. Active production, quoted 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 (0.25 ... 1.5 mm²)","Width":"575mm","title":"3RW4466-2BC34","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 spring-type terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5558-2HA14<<","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 (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":"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%","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/363ecc6abcb61095c0155c011a760bb4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=440138&mlfb=3RW4466-2BC34"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RW4466-2BC34?","answer":"Submit an RFQ through this listing. The unit is sourced through authorized distribution channels."},{"question":"What are the main circuit connection options for this soft starter?","answer":"The main current circuit accepts busbar connections, stranded cable from 70 to 240 mm², finely stranded from 50 to 240 mm², and North American kcmil sizes from 2/0 to 500 kcmil."},{"question":"Does this soft starter include a bypass contactor?","answer":"Yes, the integrated bypass contactor is built in. You do not need to add a separate bypass contactor — the unit carries the full motor current through the bypass once the start ramp completes, removing heat from the thyristors during continuous running."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4466-2BC34","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/3RW4466-2BC34 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}}