{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4457-6BC46","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4457-6BC46","canonicalUrl":"https://aoctrl.com/siemens/3RW4457-6BC46","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4457-6BC46","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4457-6BC46 soft starter, 1524 A at 40 °C, 230 V AC, 50/60 Hz, inside-delta circuit, integrated bypass, screw-type terminals.","salesMarkdown":"## Inside-delta topology and integrated bypass The 3RW4457-6BC46: This unit supports inside-delta wiring, which lets you run the thyristors in the delta legs of a six-lead motor — that cuts the line current the soft starter handles by roughly 58 % compared to standard inline connection. The integrated bypass contact system takes the thyristors out of the circuit after start, so heat buildup in the enclosure during continuous run is from the bypass contacts, not the silicon. ## Mounting, clearance, and termination Mounting position is flexible: vertical surface with ±90° rotation, or ±22.5° tilt front-to-back. It needs 100 mm clearance above and 75 mm below for airflow, and only 5 mm at the sides — tight panel packing is possible if the vertical ducting is right. Power wiring options: stranded 70–240 mm², finely stranded 50–240 mm², or 2/0–500 kcmil for the main contacts. ## Protection and diagnostics that save a service call Built-in motor overload protection and intrinsic device protection mean you don't need a separate overload relay for most installations — the soft starter handles thermal modelling of the motor itself. Adjustable current limitation lets you set the start current profile to match the load, which is useful for conveyors or pumps that don't need full torque at zero speed. A display shows fault codes, and the unit accepts an external reset, so you can wire a remote reset button on the panel door rather than cycling main power. There's also a motor brake output integrated — handy for stopping a coasting load quickly without an external brake controller.","metaTitle":"Siemens 3RW4457-6BC46 SIRIUS Soft Starter, 1524 A, 230 V","metaDescription":"Siemens SIRIUS 3RW4457-6BC46 soft starter, 1524 A at 40 °C, 230 V AC, 50/60 Hz. Active production, sourced to order.","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":"3RW4457-6BC46","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: 880 A, 900 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 >>3RW5556-6HA16<<","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 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","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":"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 ... 690V","at 690 V at standard circuit at 40 °C rated value":"900kW","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/efaa4c63b78bd4f320223afe2668428d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=467797&mlfb=3RW4457-6BC46"},"ai":{"faq":[{"question":"What is the inside-delta wiring option on this soft starter?","answer":"Inside-delta wiring connects the thyristors in the delta legs of a six-lead motor. This reduces the line current the soft starter handles by roughly 58 % compared to a standard inline connection, letting a smaller unit control a larger motor. The integrated bypass then takes the thyristors out of circuit during run."},{"question":"What compliance documentation is available for the 3RW4457-6BC46?","answer":"The device carries a pollution degree of 3 per IEC 60947-4-2 and a rated insulation voltage of 690 V. Standard Siemens documentation for the SIRIUS series includes CE, UKCA, and UL/CSA declarations — request the specific certificate bundle at RFQ."},{"question":"How is the 3RW4457-6BC46 quoted for volume purchases?","answer":"No stock-holding claim on this listing; submit an RFQ for your volume and delivery window."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4457-6BC46","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/3RW4457-6BC46 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}}