{"product_id":"square-d-hja36090-90a-600v-3-pole-plug-in-circuit-breaker","title":"Square D HJA36090 - 90 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D HJA36090, a robust 90 A, 600 V, 3-pole plug-in molded case circuit breaker built to shield your electrical systems from branch circuit overloads and short circuits. Designed for dependable protection in panelboards and load centers, this breaker pairs fast, easy installation with precise, reliable trip performance.\u003c\/p\u003e \u003ch2\u003eWhy this breaker stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e — streamline installation and quick replacement, reducing downtime during panel maintenance or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e — combines rapid magnetic action for short-circuit events with a temperature-sensitive thermal element, delivering stable and repeatable protection across varying conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready compatibility\u003c\/strong\u003e — designed to mate with matching Square D load centers and panelboards, ensuring proper fit, indexing, and coordination.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e — ideal for residential, commercial, and light industrial environments where three-phase protection and reliable performance matter.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eExact specifications\u003c\/h2\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 HJA36090\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 90 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Plug-in\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 \u003ch2\u003ePractical use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or expanding panelboards in small-to-medium commercial spaces where reliable 3-phase protection is required.\u003c\/li\u003e \u003cli\u003eReplacing worn or malfunctioning breakers in existing Square D installations to restore dependable circuit protection.\u003c\/li\u003e \u003cli\u003eIntegrating into light industrial storefronts or workshops that operate moderate three-phase equipment and machinery.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWho benefits\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eElectrical contractors performing panel maintenance or system upgrades.\u003c\/li\u003e \u003cli\u003eFacility managers overseeing commercial or light industrial electrical infrastructure.\u003c\/li\u003e \u003cli\u003eResidential electricians handling multi-family or larger home electrical systems with 3-phase needs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eHow it compares and why it matters\u003c\/h2\u003e\n\u003cp\u003eCompared to generic plug-in breakers, the Square D HJA36090 offers a deliberate balance of speed and protection. The plug-in design shortens installation and replacement cycles, while the dual-sensing thermal-magnetic trip unit minimizes nuisance trips and maintains consistent performance across temperature fluctuations. Its OEM compatibility reduces the risk of fitment issues during panelboard upgrades, helping you maintain electrical safety standards with confidence.\u003c\/p\u003e \u003ch2\u003eInstallation tips and best practices\u003c\/h2\u003e\n\u003cp\u003eInstall in compatible Square D panelboards and load centers, ensuring the 3-pole assembly matches the system’s three-phase configuration. Before any work, power down the service, use appropriate PPE, and verify voltage and amperage ratings align with your circuit requirements. For optimal protection, pair this breaker with corresponding panel components designed for 600 V systems and 90 A branch circuits.\u003c\/p\u003e \u003cp\u003eWhether you’re provisioning a new commercial space, updating an aging distribution panel, or performing routine maintenance, the Square D HJA36090 delivers reliable, three-phase protection with installation efficiency that keeps projects on schedule.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355290063010,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/schnieder_and_square_d_breaker_and_panel_ad9b362e-1cda-4287-91db-4c509ccad1a5.png?v=1764690975","url":"https:\/\/www.ampstate.com\/products\/square-d-hja36090-90a-600v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}