{"product_id":"square-d-mja36300-300a-3p-600v-circuit-breaker","title":"Square D MJA36300 300A 3P 600V Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D MJA36300 is a rugged, industrial-grade circuit breaker engineered for dependable overcurrent protection in panelboards, load centers, and distribution networks. Designed for 300 A per branch with three poles and a 600 V rating, this direct-part solution ensures reliable performance in demanding electrical environments while preserving compatibility with Square D panels and assemblies.\u003c\/p\u003e \u003cp\u003eWhy this matters in real-world setups: sourcing a part-number-specific breaker minimizes installation surprises, reduces cross-compatibility risk, and streamlines maintenance inventories. AmpState stocks the MJA36300 to support maintenance teams, panel builders, and spare inventories where a precise fit is essential for safety and performance.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e MJA36300\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 300 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Square D MJA-series circuit breaker\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal use cases\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePanelboards and load centers in commercial facilities, warehouses, and light industrial sites requiring robust 300 A protection\u003c\/li\u003e \u003cli\u003eDistribution panels within electrical distribution systems where exact part-number matching matters for reliability and coordination\u003c\/li\u003e \u003cli\u003eSpare inventory for panel builders and service teams who routinely work with Square D equipment\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical considerations to maximize value\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eConfirm the exact part number (MJA36300) to ensure mechanical fit and electrical characteristics align with your panel labeling and upstream protection scheme\u003c\/li\u003e \u003cli\u003eVerify system requirements include 600 V maximum and three-pole protection for the distribution arrangement\u003c\/li\u003e \u003cli\u003eWhen planning replacements, pairing this MJA-series breaker with compatible Square D panel hardware helps maintain coordinated performance and predictable trip behavior\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eNeed help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit. AmpState is a trusted source for direct-match breakers like the MJA36300, making it easier to secure the exact component you need for reliable, compliant electrical protection.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46412401737890,"sku":"MJA36300","price":21482.0,"currency_code":"CAD","in_stock":true}],"url":"https:\/\/www.ampstate.com\/products\/square-d-mja36300-300a-3p-600v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}