{"product_id":"siemens-sirius-soft-starter-motor-control-3rw4446-6bc44","title":"Siemens SIRIUS Soft Starter - Motor Control 3RW4446-6BC44","description":"\u003ch2\u003eSiemens 3RW4446-6BC44: High-Capacity Motor Control Solution\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e3RW4446-6BC44\u003c\/strong\u003e from Siemens SIRIUS series delivers exceptional motor management. This industrial soft starter handles the most demanding three-phase applications. It provides smooth acceleration for heavy machinery and equipment. The advanced design ensures reliable performance in tough environments.\u003c\/p\u003e\n\u003ch3\u003eEssential Technical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eManufacturer:\u003c\/span\u003e Siemens\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eProduct Line:\u003c\/span\u003e SIRIUS Soft Starter\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eModel Code:\u003c\/span\u003e \u003cstrong\u003e3RW4446-6BC44\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eOperating Current:\u003c\/span\u003e 356A standard, 617A inside-delta\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003ePower Rating:\u003c\/span\u003e 355 kW at 400V inside-delta\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eSupply Voltage:\u003c\/span\u003e 200-460 V AC range\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eControl Voltage:\u003c\/span\u003e 230 V AC 50\/60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eInsulation Strength:\u003c\/span\u003e 690 V rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eFrequency Operation:\u003c\/span\u003e 50-60 Hz ±10%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdvanced Protection Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIntegrated bypass contactor reduces energy consumption\u003c\/li\u003e\n\u003cli\u003eComplete motor overload protection prevents damage\u003c\/li\u003e\n\u003cli\u003eThermistor monitoring for temperature-based shutdown\u003c\/li\u003e\n\u003cli\u003eAdjustable current limiting protects your equipment\u003c\/li\u003e\n\u003cli\u003eIntrinsic device safety ensures operational reliability\u003c\/li\u003e\n\u003cli\u003eExternal reset function allows remote operation\u003c\/li\u003e\n\u003cli\u003eMotor brake output provides controlled stopping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePerformance Characteristics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eStandard Circuit Power:\u003c\/span\u003e 200 kW at 400V\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eInside-Delta Capacity:\u003c\/span\u003e 355 kW maximum output\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eTemperature Performance:\u003c\/span\u003e 315A at 50°C, 280A at 60°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eInside-Delta Current:\u003c\/span\u003e 546A at 50°C, 485A at 60°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eMinimum Load Requirement:\u003c\/span\u003e 8% system capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003ePower Dissipation:\u003c\/span\u003e 174W typical operation\u003c\/li\u003e\n\u003cli\u003eContinuous operation capability at 115% rated current\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eUnit Dimensions:\u003c\/span\u003e 210 × 230 × 298 mm (W×H×D)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eMounting Type:\u003c\/span\u003e Screw fixation method\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eMounting Flexibility:\u003c\/span\u003e ±90° rotation capability\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eClearance Space:\u003c\/span\u003e 100mm top, 5mm sides, 75mm bottom\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eMaximum Wiring Distance:\u003c\/span\u003e 500 meters\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eEnclosure Rating:\u003c\/span\u003e IP00 standard, IP20 with cover\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eElectrical Connection Data\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eMain Circuit:\u003c\/span\u003e Busbar or screw terminal options\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eControl Terminals:\u003c\/span\u003e Screw-type connection system\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eConductor Range:\u003c\/span\u003e 70-240 mm² front, 120-185 mm² back\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eContact Configuration:\u003c\/span\u003e 3 NO + 1 CO auxiliary contacts\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eControl Wiring:\u003c\/span\u003e 0.5-2.5 mm² solid or stranded\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eAWG Compatibility:\u003c\/span\u003e 2\/0 to 500 kcmil main circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEnvironmental Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eOperating Temperature:\u003c\/span\u003e Maximum 60°C ambient\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eStorage Conditions:\u003c\/span\u003e -25°C to +80°C range\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003ePerformance Derating:\u003c\/span\u003e Starts above 40°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eInstallation Altitude:\u003c\/span\u003e Up to 5000 meters ASL\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003ePollution Degree:\u003c\/span\u003e Level 3 industrial environments\u003c\/li\u003e\n\u003cli\u003eResists vibration, humidity, and non-conductive dust\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eShipping \u0026amp; Package Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFactory-fresh \u003cstrong\u003e3RW4446-6BC44\u003c\/strong\u003e soft starter unit\u003c\/li\u003e\n\u003cli\u003eAll necessary mounting hardware included\u003c\/li\u003e\n\u003cli\u003eProtective packaging ensures perfect condition\u003c\/li\u003e\n\u003cli\u003eGlobal shipping via FedEx, UPS, and DHL carriers\u003c\/li\u003e\n\u003cli\u003e12-month product warranty from delivery date\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eExpert Technical Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e75b6;\"\u003eWhat applications suit this high-current soft starter?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eThis unit perfectly handles large industrial pumps and heavy conveyors. It manages high-inertia loads like crushers and large fans effectively.\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e75b6;\"\u003eHow does the inside-delta configuration benefit users?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eThe inside-delta connection nearly doubles your motor power capacity. This design significantly reduces overall system costs for high-power applications.\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e75b6;\"\u003eWhat maintenance does this soft starter require?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eRegular thermal imaging checks of connections ensure optimal performance. We recommend annual inspection of all power terminals and cooling surfaces.\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e75b6;\"\u003eCan this starter coordinate with existing PLC systems?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eYes, the multiple auxiliary contacts provide excellent control integration. The device communicates status through programmable output signals.\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e75b6;\"\u003eWhat happens during power fluctuation conditions?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eThe unit maintains stable operation through voltage variations from -15% to +10%. It automatically recovers when power returns to normal parameters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e© 2025 Ubest Automation Limited. All rights reserved.\u003cbr\u003eOriginal Source: \u003ca href=\"https:\/\/www.ubestplc.com\/\"\u003ehttps:\/\/www.ubestplc.com\/\u003c\/a\u003e\u003cbr\u003eContact: \u003ca href=\"mailto:sales@ubestplc.com\"\u003esales@ubestplc.com\u003c\/a\u003e Phone: \u003ca href=\"https:\/\/wa.me\/8618030005825\"\u003e+86 180 3000 5825\u003c\/a\u003e\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":51302056526106,"sku":"3RW4446-6BC44","price":188.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/6240\/4634\/files\/3RW4446-6BC44.jpg?v=1762829336","url":"https:\/\/www.ubestplc.com\/fa\/products\/siemens-sirius-soft-starter-motor-control-3rw4446-6bc44","provider":"Ubest Automation Limited","version":"1.0","type":"link"}