{"product_id":"square-d-hja36150u44x-150a-600v-3-pole-plug-in-circuit-breaker","title":"Square D HJA36150U44X - 150 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSquare D HJA36150U44X is a 150 A, 600 V, 3-pole plug-in molded case circuit breaker designed to protect panelboards and load centers from overcurrent and short circuits. Built for dependable, fast replacement and reliable performance, this unit keeps electrical systems running smoothly with minimal downtime.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e — streamlined installation and quick swap-outs, reducing service time in crowded electrical enclosures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e — delivers stable, repeatable protection by combining precise thermal sensing for overloads with magnetic tripping for high fault currents.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole design for 3-phase circuits\u003c\/strong\u003e — ideal for commercial and light industrial applications where three-phase protection is required.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible mounting\u003c\/strong\u003e — engineered to integrate with matching Square D load centers and panelboards for a seamless, coordinated protection solution.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-current, high-voltage capability\u003c\/strong\u003e — 150 A rating with a 600 V maximum, suitable for demanding branch circuits in diverse settings.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWho should consider this breaker? electrical contractors, facilities managers, and system integrators responsible for service panels in commercial spaces, light industrial facilities, and multi-residential developments. It’s the reliable choice when you need to safeguard critical circuits against overloads and short circuits, reducing downtime and preventing equipment damage.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\u003cstrong use case: panelboard retrofit\u003e — replacing aging or failed breakers in 3-phase panelboards to restore protection quickly.\u003c\/strong\u003e\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUse case: new installations\u003c\/strong\u003e — integrating into new or upgraded load centers that require robust, plug-in protection for large branch circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUse case: service panel upgrades\u003c\/strong\u003e — upgrading to a higher-current, 3-pole solution for improved performance and expansion capacity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\u003cstrongmanufacturer:\u003e Square D\u003c\/strongmanufacturer:\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongpart number:\u003e HJA36150U44X\u003c\/strongpart\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongtype:\u003e Thermal-magnetic molded case circuit breaker\u003c\/strongtype:\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongamperage rating:\u003e 150 A\u003c\/strongamperage\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongvoltage rating:\u003e 600 V\u003c\/strongvoltage\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongnumber of poles:\u003e 3\u003c\/strongnumber\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongmounting style:\u003e Plug-in\u003c\/strongmounting\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongapplication:\u003e Branch circuit overcurrent and short-circuit protection\u003c\/strongapplication:\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355292520610,"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_c2aa5bbc-4a58-4764-b872-8ff91a02db49.png?v=1764690990","url":"https:\/\/www.ampstate.com\/products\/square-d-hja36150u44x-150a-600v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}