{"product_id":"square-d-qob2901021-circuit-breaker","title":"Square D | QOB2901021 | Circuit Breaker | 90A | 2-Pole | 240V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D QOB2901021 circuit breaker—the OEM-grade solution designed to deliver dependable overcurrent protection in 240V panels. This 90A, 2-pole unit provides robust, coordinated protection for both hot legs, helping keep your electrical system safe and compliant during demanding operations or upgrades.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 90A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e QOB2901021 (best reference for compatibility)\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cp\u003eChoosing an OEM Square D breaker like the QOB2901021 ensures precise fit, correct trip characteristics, and reliable electrical coordination with your existing panel. Designed for both maintenance and retrofit projects, this unit helps you maintain proper protection without compromising panel integrity or safety margins.\u003c\/p\u003e \u003ch3\u003eWhat problems it solves\u003c\/h3\u003e\n\u003cp\u003eWhen panels are aging or load requirements shift, simply swapping in a compatible 90A 2-pole 240V breaker minimizes downtime and maintains critical circuit protection. The QOB2901021 is ideal for replacing worn or tripped breakers in systems that require a precise 90-amp, two-pole solution, ensuring consistent performance across both conductors and preserving proper disconnection in fault conditions.\u003c\/p\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance and retrofit projects where exact specifications are required\u003c\/li\u003e \u003cli\u003eReplacement in Square D panels that accommodate the QOB series\u003c\/li\u003e \u003cli\u003eUpgrading or restoring 240V circuits that demand 90A protection with two poles\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eImportant compatibility notes\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, confirm the fit and ratings for your panel. The part number QOB2901021 is the most reliable reference to ensure compatibility with your Square D electrical system and to maintain proper electrical protection\u003c\/p\u003e \u003ch3\u003ePractical tips for installation and use\u003c\/h3\u003e\n\u003cp\u003eHandle with the power off and follow standard safety protocols. When replacing a breaker, verify that the new unit interrupts at the same or higher current level as the original, and ensure the panel labeling reflects the updated rating. If you’re unsure about panel compatibility, rely on the part number QOB2901021 as your guiding reference to match the correct bus design and mounting style.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426280624290,"sku":"QOB2901021","price":4110.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/square-d-qob2901021-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}