{"product_id":"150-f251nbd-allen-bradley-smc-flex-motor-controller-251a-200-460v","title":"150-F251NBD Allen-Bradley SMC Flex Motor Controller 251A 200-460V","description":"\u003c!-- SEO Titles (Max 65 chars) - Place in Shopify's SEO settings --\u003e\u003c!-- 150-F251NBD Allen-Bradley SMC Flex: 251A, 200-460V AC, 3-phase. Electronic overload, ground fault. Open enclosure. Buy now. --\u003e\n\u003ch2\u003e\u003cstrong\u003e150-F251NBD Allen‑Bradley SMC Flex Solid‑State Controller\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Technical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Allen‑Bradley\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e \u003cstrong\u003e150-F251NBD\u003c\/strong\u003e – SMC‑Flex series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Current:\u003c\/strong\u003e 251 Amps continuous, with overload protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine Voltage:\u003c\/strong\u003e 200 to 460V AC (broader range 200–575V AC), 3‑phase, 50\/60 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Voltage:\u003c\/strong\u003e 120\/240V AC (100–240V AC range).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Output:\u003c\/strong\u003e 250 HP at 575V line connected; 350 HP at 460V delta connected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure:\u003c\/strong\u003e Open type – requires additional cooling and clean environment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 68.00 lbs (30.84 kg).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulletin Number:\u003c\/strong\u003e Solid‑state controller with built‑in SCR bypass\/run contactor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAdvanced Protection \u0026amp; Detection Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectronic motor overload:\u003c\/strong\u003e Integral protection eliminates the need for separate relays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround fault detection:\u003c\/strong\u003e Programmable trip or alarm; requires an external sensor for operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgrammable contacts:\u003c\/strong\u003e One normally open and one normally closed contact for flexible control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft‑start capability:\u003c\/strong\u003e Reduces excessive current and torque during motor starting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSCR bypass\/run contactor:\u003c\/strong\u003e Built‑in to minimise heat and energy loss during run mode.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is the difference between line and delta connection for the 150-F251NBD?\u003c\/strong\u003e\u003cbr\u003eIn line connection the controller handles 250 HP at 575V; in delta connection it manages 350 HP at 460V because the windings reconfigure for higher power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan I use this controller without an external ground‑fault sensor?\u003c\/strong\u003e\u003cbr\u003eYou can enable the ground‑fault alarm or trip only when you connect an external sensor; otherwise the detection remains inactive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes the \u003cstrong\u003e150-F251NBD\u003c\/strong\u003e include overload protection?\u003c\/strong\u003e\u003cbr\u003eYes, it has a built‑in electronic motor overload feature, so you do not need an external overload relay.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat control voltage does this unit require?\u003c\/strong\u003e\u003cbr\u003eIt accepts 100 to 240V AC (120\/240V AC nominal) for the control circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs the unit ready to mount in a panel?\u003c\/strong\u003e\u003cbr\u003eYes, but because it has an open enclosure, ensure proper cooling and follow the temperature guidelines (0–50 °C).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat documentation comes with the soft starter?\u003c\/strong\u003e\u003cbr\u003eThe package includes a printed quick‑start guide. For full details, download the official Allen‑Bradley SMC‑Flex user manual below.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-top: 20px;\"\u003eFor any technical or sales inquiries, contact us: \u003ca href=\"mailto:sales@nex-auto.com\"\u003esales@nex-auto.com\u003c\/a\u003e | \u003ca href=\"https:\/\/wa.me\/8615392429628\" target=\"_blank\"\u003e+86 153 9242 9628 (WhatsApp)\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003ePartner: \u003ca href=\"https:\/\/www.nex-auto.com\/\" rel=\"noopener\" target=\"_blank\"\u003eNexAuto Technology Limited\u003c\/a\u003e – your trusted source for industrial automation.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45789241540769,"sku":"150-F251NBD","price":248.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0673\/5390\/3265\/files\/150-F251NBD.jpg?v=1773816212","url":"https:\/\/www.autonexcontrol.com\/az\/products\/150-f251nbd-allen-bradley-smc-flex-motor-controller-251a-200-460v","provider":"AutoNex Controls Limited ","version":"1.0","type":"link"}