{"product_id":"square-d-lal3640036m1021-circuit-breaker","title":"Square D | LAL3640036M1021 | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D LAL3640036M1021 circuit breaker — a robust, OEM-grade protection device designed for reliability in demanding electrical systems. With a 400A capacity and a 3-pole configuration at 600V, it's built to handle the power needs of industrial panels and commercial installations where safety and uptime matter most.\u003c\/p\u003e \u003cp\u003eKey features and why it matters:\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LAL3640036M1021 — use this exact reference to verify compatibility with your Square D panel or switchgear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 400A — suitable for main or feeder protection in medium- to heavy-duty applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles\u003c\/strong\u003e: 3-pole design for three-phase circuits, ensuring coordinated protection across all phases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage rating\u003c\/strong\u003e: 600V — designed for commercial\/industrial systems, delivering reliable interruption capacity where required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit and compatibility notes\u003c\/strong\u003e: Confirm fit and ratings before ordering; the part number is the best reference for compatibility with your panel.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eTypical use cases:\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003eNew installations in industrial control panels or large commercial electrical rooms that require a precise 3-pole 400A, 600V breaker.\u003c\/li\u003e\n\u003cli\u003eMaintenance or retrofit of legacy Square D panels where a direct part replacement is requested to minimize downtime.\u003c\/li\u003e\n\u003cli\u003eSpare or replacement unit for service reliability in facilities with high power demand, such as manufacturing lines or data centers relying on stable power distribution.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhat makes this breaker stand out:\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003eAuthentic Square D component designed to integrate with Square D panels and accessories, reducing the risk of fitment issues common with generic substitutes.\u003c\/li\u003e\n\u003cli\u003eDirect part reference reduces compatibility checks and cross-referencing during procurement, speeding up maintenance cycles.\u003c\/li\u003e\n\u003cli\u003eClear, unambiguous ratings (400A, 3-pole, 600V) help you plan ahead for load calculations and safety margins in your electrical design.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical tips:\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003eAlways verify the panel labeling and service requirements align with 400A, 3-pole, 600V before purchase.\u003c\/li\u003e\n\u003cli\u003eKeep the exact part number handy when ordering or requesting quotes to avoid substitutes that don’t match your panel’s topology.\u003c\/li\u003e\n\u003cli\u003eIf you’re replacing failing units in a multi-breaker assembly, ensure the replacement maintains the same trip characteristics to preserve coordinated protection across the panel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46427509817506,"sku":"LAL3640036M1021","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_ad06fdd7-931c-4a09-bfbe-d05329579cd6.png?v=1765492978","url":"https:\/\/www.ampstate.com\/products\/square-d-lal3640036m1021-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}