{"product_id":"qob390","title":"Square D QOB390 - 90A, 240VAC, 3-Pole, Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eFor robust three-phase protection in demanding environments, the \u003cstrong\u003eSquare D QOB390\u003c\/strong\u003e - \u003cstrong\u003e90A\u003c\/strong\u003e, \u003cstrong\u003e240VAC\u003c\/strong\u003e, \u003cstrong\u003e3-Pole\u003c\/strong\u003e Circuit Breaker delivers reliable overcurrent protection exactly where it's needed. Built to perform in industrial, commercial, and OEM settings, this breaker fits panelboards, switchboards, and control panels that demand dependable, coordinated protection for every phase.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 90A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 240VAC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBreaker type:\u003c\/strong\u003e Circuit Breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Ideal for three-phase distribution and motor circuits\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e3-pole design streamlines installation in three-phase systems, reducing wiring complexity and providing synchronized interruption across all phases. This makes it an excellent choice for panelboards, switchboards, and motor control centers where space is at a premium and protection must cover every leg of the circuit.\u003c\/p\u003e \u003cp\u003eWhy choose the Square D QOB390 in your next project? It offers dependable overcurrent protection that helps guard motors, feeders, and downstream equipment from damage due to short circuits or overloads. In environments where uptime matters, this breaker supports safer operation and easier maintenance by clearly indicating fault conditions in a compact, serviceable package.\u003c\/p\u003e \u003cp\u003eIdeal use cases include:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eProtecting 3-phase motor circuits in manufacturing lines, pumps, conveyors, and processing equipment\u003c\/li\u003e \u003cli\u003eMain protection for distribution panels and control centers in commercial facilities\u003c\/li\u003e \u003cli\u003eOEM applications requiring a reliable, compact 3-pole protection solution\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eInstallation and integration notes:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eDesigned to fit compatible Square D panelboards and switchgear intended for 3-phase 240V systems\u003c\/li\u003e \u003cli\u003eVerify that the enclosure and bus connections accommodate a 3-pole, 90A breaker\u003c\/li\u003e \u003cli\u003eFollow manufacturer installation guidelines for mounting, wiring, and safety practices to ensure proper operation\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoosing the Square D QOB390 means selecting a trusted solution that aligns with real-world needs: compact 3-phase protection, straightforward wiring, and dependable performance in panels and motor control centers. If your setup runs on 240V three-phase power and needs reliable, ready-to-install overcurrent protection, this breaker is a practical, purpose-built choice.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default","offer_id":46390727835810,"sku":"QOB390","price":366.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/circuit_breaker_generic_7723f1b5-322c-4900-827c-ebac51171fec.png?v=1765379382","url":"https:\/\/www.ampstate.com\/products\/qob390","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}