{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4457-6BC45","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4457-6BC45","canonicalUrl":"https://aoctrl.com/siemens/3RW4457-6BC45","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4457-6BC45","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4457-6BC45 soft starter, 1524 A at 40 °C, 690 V insulation voltage, integrated bypass, inside-delta circuit, screw fixing.","salesMarkdown":"## Rated for the heavy lift — 1524 A at 40 °C The Siemens SIRIUS 3RW4457-6BC45 is a soft starter rated 1524 A at 40 °C, derating to 1351 A at 50 °C and 1200 A at 60 °C. That 1524 A figure governs the full-load motor current it can start and run through the thyristor stack — sized for large induction motors on 400 V to 690 V lines. The 690 V rated insulation voltage and pollution degree 3 per IEC 60947-4-2 mean it's built for industrial panels where conductive dust or humidity is present; no need to overspec for dirty environments. Inside-delta wiring is supported, which lets the starter control only two phases while the motor's own windings complete the third. ## Integrated bypass — no external contactor needed An integrated bypass contact system bridges the thyristors after start, so the soft starter runs cool in continuous operation and the bypass carries the full motor current without thyristor losses. No separate bypass contactor to wire, size, or fail. The unit also includes motor overload protection and intrinsic device protection, covering both the motor and the starter's own semiconductors against overtemperature and overcurrent. Mounting is screw fixing to a vertical surface, rotatable ±90° and tiltable ±22.5° front-to-back. Clearances: 100 mm above, 75 mm below, 5 mm at the sides. The 640 mm height and 510 mm width need a substantial enclosure.","metaTitle":"Siemens 3RW4457-6BC45 SIRIUS Soft Starter, 1524 A, 690 V","metaDescription":"Siemens SIRIUS 3RW4457-6BC45 soft starter, 1524 A at 40°C, 690 V insulation, integrated bypass, inside-delta circuit. Active production.","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","Height":"640mm","Upwards":"100mm","Stranded":"70 ... 240 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","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 524A","at 50 °C rated value":"1 351A","at 60 °C rated value":"1 200A","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","during storage acc. to IEC 60721":"1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4","For Auxiliary And Control Circuit":"screw-type terminals","during operation acc. 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 acc. to IEC 60721":"2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m)","Product Component Motor Brake Output":"Yes","reference code acc. to DIN EN 61346-2":"Q","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":"630kW","at standard circuit at 50 °C rated value":"850hp","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 000kW","at inside-delta circuit at 50 °C rated value":"1 500hp","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","protection class IP on the front acc. to IEC 60529":"IP00","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":"250W","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":"176A","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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=17270&mlfb=3RW4457-6BC45","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RW4457-6BC45/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4457-6BC45","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and 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Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}