{"product_id":"square-d-hjl36040-40a-600v-3-pole-circuit-breaker","title":"Square D HJL36040 - 40 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D HJL36040 40A, 600V, 3-pole molded case circuit breaker is engineered to deliver dependable branch circuit protection for panelboards and loadcenters. Designed to fit seamlessly into compatible Square D OEM panels, this unit balances compact size with robust performance to keep electrical systems safe and downtime minimal.\u003c\/p\u003e \u003ch3\u003eWhy this 3-pole breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded case design\u003c\/strong\u003e saves valuable panel space, allowing easier wire routing and cleaner installations in crowded electrical enclosures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection by combining time-delayed overload protection with instantaneous response to short circuits. This means fewer nuisance trips and quicker clearance of faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e is ideal for 3-phase distribution, delivering coordinated protection across all phases in commercial and light industrial settings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600V voltage rating\u003c\/strong\u003e supports higher voltage applications, expanding its suitability beyond basic residential circuits to more demanding commercial uses.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e design ensures reliable fit and performance when paired with matching Square D loadcenters and panelboards, reducing the risk of fitment issues during upgrades or replacements.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e40A rated\u003c\/strong\u003e for branch circuits and equipment feeders that require solid, predictable protection without over-tripping essential loads.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWho benefits from the Square D HJL36040\u003c\/h3\u003e\n\u003cp\u003e electricians and maintenance teams installing or upgrading panelboards in light commercial spaces, small offices, or multifamily buildings; property managers looking for dependable, OEM-certified replacements; and contractors seeking a trusted, easily integrable protection solution for three-phase electrical networks.\u003c\/p\u003e \u003ch3\u003ePractical use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eProtecting three-phase lighting and small-motor loads in a commercial storefront or office building.\u003c\/li\u003e \u003cli\u003eServing as a reliable branch-circuit safeguard for feeders in a light industrial panel within a workshop or manufacturing area.\u003c\/li\u003e \u003cli\u003eReplacement or upgrade in Square D panelboards where OEM consistency and panel compatibility are priorities.\u003c\/li\u003e \u003cli\u003ePart of a modular protection strategy in retrofit projects where space efficiency and ease of installation matter most.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and compatibility considerations\u003c\/h3\u003e\n\u003cp\u003eChoose the HJL36040 when you need a trusted Square D solution that aligns with compatible OEM loadcenters and panelboards. Before installation, verify that the panelboard accepts a 3-pole molded case circuit breaker of this rating, and follow standard electrical safety practices. The thermal-magnetic trip unit will automatically manage protection for both overloads and short circuits, helping reduce equipment damage and downtime.\u003c\/p\u003e \u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HJL36040\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhen you choose the Square D HJL36040, you’re selecting a proven protection solution built for reliability in diverse environments—from residential panel upgrades to commercial and light industrial installations. It’s a practical, OEM-compatible choice that supports safe, efficient electrical distribution across your space.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355293733026,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-hjl36040-40-a-600-v-3-pole-circuit-breaker-ampstate-587.webp?v=1788747746","url":"https:\/\/www.ampstate.com\/products\/square-d-hjl36040-40a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}