{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4446-6BC44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4446-6BC44","canonicalUrl":"https://aoctrl.com/siemens/3RW4446-6BC44","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4446-6BC44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS soft starter, 3RW4446-6BC44, 617A at 40°C, 690V insulation voltage, thyristor-switched, screw fixing, 230x210x298mm.","salesMarkdown":"It uses thyristor switching to ramp motor voltage during start, limiting inrush current and mechanical stress on the driven load — conveyor belts, pumps, or compressors in a process line. The unit includes integrated motor overload protection and supports inside-delta circuit wiring, which reduces the rated current requirement on the soft starter for a given motor by roughly 40% compared to standard in-line connection. The headline current rating of 617 A at 40 °C derates to 546 A at 50 °C and 485 A at 60 °C — the ambient temperature inside the panel governs which figure applies. If the enclosure runs at 50 °C, the soft starter is good for a 546 A motor FLA, not 617 A. Mounts via screw fixing on a vertical surface, rotatable ±90° and tiltable ±22.5° front-to-back — gives flexibility in tight cabinets. Clearance required: 100 mm above, 75 mm below, 5 mm at the sides. Dimensions are 230 mm high × 210 mm wide × 298 mm deep. Main circuit connections accept busbar or cable: stranded 70–240 mm², finely stranded 50–240 mm², or AWG 2/0–500 kcmil. Auxiliary control wiring uses solid 0.5–2.5 mm² or AWG 20–14. Maximum wire length from soft starter to motor is 500 m — sufficient for most plant layouts, but check voltage drop on long runs. The 3RW4446-6BC44 carries a lifecycle status of current production. The part belongs to the Siemens SIRIUS family, a widely specified platform, so cross-referencing into existing BOMs is straightforward.","metaTitle":"Siemens 3RW4446-6BC44 SIRIUS Soft Starter, 617A at 40°C","metaDescription":"Siemens 3RW4446-6BC44 SIRIUS soft starter, 617A rated at 40°C, 690V insulation voltage. Active production. Sourced to order against RFQ. Thyristor-switched with motor overload prot","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"298mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"210mm","Height":"230mm","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":"617A","at 50 °C rated value":"546A","at 60 °C rated value":"485A","For Auxiliary Contacts":"2x (20 ... 14)","For Main Current Circuit":"busbar connection","Motor Overload Protection":"Yes","Using Both Clamping Points":"min. 2x 2/0, max. 2x 500 kcmil","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Using The Back Clamping Point":"250 ... 500 kcmil","Insulation Voltage Rated Value":"690V","Using The Front Clamping Point":"3/0 ... 600 kcmil","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":"200kW","at standard circuit at 50 °C rated value":"250hp","Finely Stranded Without Core End Processing":"min. 2x 50 mm², max. 2x 185 mm²","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":"355kW","at inside-delta circuit at 50 °C rated value":"450hp","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%","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":"174W","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":"71A","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":"$3,600.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=158228&mlfb=3RW4446-6BC44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RW4446-6BC44/alternatives.json"},"ai":{"faq":[{"question":"What mounting clearances does the 3RW4446-6BC44 require?","answer":"Clearances: 100 mm above, 75 mm below, 5 mm at the sides. Mounting position is vertical surface with ±90° rotation and ±22.5° tilt."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4446-6BC44","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/3RW4446-6BC44 when reusing this data. 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}}