{"product_id":"square-d-mjl36300-circuit-breaker","title":"Square D | MJL36300 | Circuit Breaker | 300A | 3-Pole","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSquare D MJL36300 300A 3-Pole Circuit Breaker\u003c\/strong\u003e is a precise, OEM replacement designed for maintenance, retrofit, and replacement projects where exact specs matter. This unit fits into compatible Square D panels that support the MJL series, ensuring you stay aligned with your system’s protection plan.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 300 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles\u003c\/strong\u003e: 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart reference\u003c\/strong\u003e: MJL36300 — the best compatibility reference for your panel\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe MJL36300 is built for reliable three‑phase protection in industrial and commercial environments. By matching the MJL series specifications, it delivers consistent electrical performance within compatible Square D panels, helping you maintain system safety and continuity without unnecessary modifications or retrofits.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eMaintenance and proactive replacement in existing Square D panels that specify MJL family breakers\u003c\/li\u003e \u003cli\u003eRetrofit projects where exact spec alignment is required to preserve protection schemes\u003c\/li\u003e \u003cli\u003eThree-phase electrical installations in manufacturing plants, data centers, and large commercial facilities\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy choose this part\u003c\/strong\u003e:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eProvides an exact, on‑spec replacement to minimize downtime and compatibility risk\u003c\/li\u003e \u003cli\u003eSupports a three‑pole configuration for balanced protection across all phases\u003c\/li\u003e \u003cli\u003ePart-number guidance (MJL36300) helps ensure you’re selecting the correct unit for your panel and bus configuration\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eImportant compatibility note\u003c\/strong\u003e: Confirm fit and ratings before ordering. The MJL36300 part number is the best reference for compatibility with your panel model and bus configuration.\u003c\/p\u003e \u003cp\u003ePractical tips for ensuring a smooth replacement:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCheck your panel’s catalog and verify that the MJL family is listed as compatible\u003c\/li\u003e \u003cli\u003eInspect mounting locations and bus stab connections for signs of wear before installation\u003c\/li\u003e \u003cli\u003eAdhere to all safety practices and torque specifications during installation to maintain proper clamping and electrical contact\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46425530171554,"sku":"MJL36300","price":12075.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-mjl36300-circuit-breaker-300a-3-pole-713.webp?v=1789419696","url":"https:\/\/www.ampstate.com\/products\/square-d-mjl36300-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}