{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4456-6BC46","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4456-6BC46","canonicalUrl":"https://aoctrl.com/siemens/3RW4456-6BC46","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4456-6BC46","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4456-6BC46 soft starter, 1351 A at 40 °C, 690 V insulation voltage, 50/60 Hz, integrated bypass, inside-delta capable, screw fixing.","salesMarkdown":"## 1351 A at 40 °C — derating drives the real-world current The 3RW4456-6BC46: In a hot mill enclosure near the rolls, that derating curve sets the usable motor FLA — not the catalog number. Insulation voltage is 690 V rated, with a pollution degree 3 environment per IEC 60947-4-2. That means the creepage distances are sized for conductive dust and humidity — typical in steel and cement plants. ## Integrated bypass and inside-delta wiring The bypass contact system is integrated — once the motor is up to speed, the thyristors are shorted, eliminating heat dissipation from the power stack during run. That means the enclosure fan load is sized for the start duty cycle, not continuous conduction. Inside-delta circuit connection is supported, which reduces the current through the soft starter to 58% of the line current for a delta-wound motor. The 1351 A rating in inside-delta covers motors up to roughly 2300 A line FLA. Mounting position allows vertical surface with ±90° rotation and ±22.5° tilt front-to-back — useful when the panel layout forces the starter onto a side wall or angled subplate. ## Active production — sourcing reality Termination for the main current circuit is busbar connection, accepting 2/0... 500 kcmil or 70... 240 mm² stranded.","metaTitle":"Siemens 3RW4456-6BC46 Soft Starter, 1351 A, 690 V, SIRIUS","metaDescription":"Siemens 3RW4456-6BC46 SIRIUS soft starter, 1351 A at 40 °C, 690 V insulated, 50/60 Hz. Active production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"290mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"510mm","title":"3RW4456-6BC46","Height":"640mm","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: 780 A, 800 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 >>3RW5554-6HA16<<","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":"1 351A","at 50 °C rated value":"1 200A","at 60 °C rated value":"1 065A","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":"560kW","at standard circuit at 50 °C rated value":"750hp","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":"900kW","at inside-delta circuit at 50 °C rated value":"1 350hp","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":"800kW","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":"214W","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":"156A","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/8e4d5e5b9fadfd7800efa66feebb90f4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=501050&mlfb=3RW4456-6BC46"},"ai":{"faq":[{"question":"What is the 3RW4456-6BC46 used for?","answer":"It is a SIRIUS soft starter that ramps voltage to three-phase induction motors, limiting inrush current and mechanical shock during start. Typical applications include conveyors, pumps, fans, and compressors in industrial panels up to 690 V."},{"question":"Where can I source the 3RW4456-6BC46?","answer":"Quoted to order against the BOM through independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4456-6BC46","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/3RW4456-6BC46 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}}