{"product_id":"allen-bradley-140mf8ec45","title":"140MF8EC45","description":"\u003ch2\u003eOverview of Allen Bradley 140MF8EC45\u003c\/h2\u003e\n\u003cp\u003eThe Allen Bradley 140MF8EC45 is a high-performance motor protection circuit breaker from the 140M series, designed to deliver reliable protection for three-phase motors up to 45A. Built for demanding industrial applications, this device combines thermomagnetic overload and short-circuit protection in one compact unit. It supports manual motor control with a turn handle, making it well-suited for both new installations and as a replacement for standard motor protective switches. With a robust screw connection design and IP2X protection, the 140MF8EC45 is engineered for durability and easy maintenance in diverse environments. Its versatility and high breaking capacity make it a dependable choice for motor circuits in factories, process plants, and automation systems.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features of Allen Bradley 140MF8EC45\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eRated permanent current: 45A with a 32-45A adjustable overload protection range\u003c\/li\u003e\n  \u003cli\u003eThermomagnetic trip mechanism for reliable motor protection\u003c\/li\u003e\n  \u003cli\u003eMaximum rated operational voltage: 690V AC\u003c\/li\u003e\n  \u003cli\u003eHigh short-circuit breaking capacity: 65kA at 400V AC\u003c\/li\u003e\n  \u003cli\u003eRated operation power: 22kW at 400V, AC-3 duty\u003c\/li\u003e\n  \u003cli\u003eManual on\/off control via turn handle\u003c\/li\u003e\n  \u003cli\u003eScrew-type main circuit electrical connections\u003c\/li\u003e\n  \u003cli\u003e3-pole configuration for three-phase motor applications\u003c\/li\u003e\n  \u003cli\u003eIngress protection: IP2X rated for basic environmental sealing\u003c\/li\u003e\n  \u003cli\u003eCompact dimensions and lightweight design for easy panel integration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specs of 140MF8EC45\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eParameter\u003c\/th\u003e\n    \u003cth\u003eValue\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eRated Permanent Current (Iu)\u003c\/td\u003e\n    \u003ctd\u003e45A\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eOverload Protection Range\u003c\/td\u003e\n    \u003ctd\u003e32-45A\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMaximum Operating Voltage\u003c\/td\u003e\n    \u003ctd\u003e690V AC\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eShort-Circuit Breaking Capacity (400V AC)\u003c\/td\u003e\n    \u003ctd\u003e65kA\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eRated Operation Power (AC-3, 400V)\u003c\/td\u003e\n    \u003ctd\u003e22kW\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eConnection Type\u003c\/td\u003e\n    \u003ctd\u003eScrew\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003ePoles\u003c\/td\u003e\n    \u003ctd\u003e3\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eControl Element\u003c\/td\u003e\n    \u003ctd\u003eTurn handle\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eIP Rating\u003c\/td\u003e\n    \u003ctd\u003eIP2X\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eWeight\u003c\/td\u003e\n    \u003ctd\u003e0.78kg\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eDimensions (HxWxD)\u003c\/td\u003e\n    \u003ctd\u003e111.4 x 54 x 110 mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications \/ Use Case\u003c\/h2\u003e\n\u003cp\u003eThe Allen Bradley 140MF8EC45 is primarily used for protecting 3-phase motors in industrial and automation environments. Typical applications include conveyor systems, pumps, fans, compressors, and general machinery where reliable motor protection is essential. Its high breaking capacity and adjustable overload settings allow it to handle both light and severe motor starting duties. The manual control feature enables quick and safe on\/off switching, reducing downtime during maintenance. The device’s robust construction and compliance with international standards ensure safe operation in control panels, MCCs, and standalone installations across manufacturing, warehousing, and process industries.\u003c\/p\u003e\n\n\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/\" target=\"_blank\"\u003eLeadTime.ca – Industrial Automation Components \u0026amp; Repair Services\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/collections\/allen-bradley\" target=\"_blank\"\u003eBrowse Allen Bradley Products at LeadTime.ca\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/blogs\/learning-center\/how-to-choose-the-right-soft-starter-for-your-motor-application\/\" target=\"_blank\"\u003eGuide to Choosing Soft Starters for Motor Applications\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/products\/allen-bradley-194e-sy\" target=\"_blank\"\u003eAllen Bradley 194E-SY Disconnect Switch\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/products\/allen-bradley-1321-3r18-b\" target=\"_blank\"\u003eAllen Bradley 1321-3R18-B Resistor Assembly\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":47814569885995,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/4671\/7995\/files\/Leadtime_94c9418e-bba5-4151-8c40-926f3ed69ddb.png?v=1723542097","url":"https:\/\/leadtime.ca\/products\/allen-bradley-140mf8ec45","provider":"LEADTIME","version":"1.0","type":"link"}