{"product_id":"square-d-hja36125us","title":"Square D HJA36125US 125A 3-Pole 600 V Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D HJA36125US 125A 3-Pole 600 V Circuit Breaker is engineered to deliver dependable overcurrent protection for demanding electrical systems. With a 125 A rating, three poles, and a 600 V maximum, this component is designed to safeguard three-phase feeders, service panels, and critical equipment across industrial, commercial, and large-scale facilities. Part number HJA36125US identifies a trusted Square D solution built to endure the rigors of daily operation while fitting seamlessly into compatible panels and enclosures.\u003c\/p\u003e \u003ch3\u003eKey specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eCurrent rating: 125 A\u003c\/li\u003e \u003cli\u003ePoles: 3\u003c\/li\u003e \u003cli\u003eVoltage rating: 600 V\u003c\/li\u003e \u003cli\u003eBrand\/line: Square D\u003c\/li\u003e \u003cli\u003ePart number: HJA36125US\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this model matters for your system\u003c\/h3\u003e\n\u003cp\u003eThree-pole construction ensures simultaneous interruption of all live conductors in a 3-phase circuit, reducing the risk of phase-to-phase faults and enabling safer shutdowns during overloads or faults. The 125 A rating is well-suited for feeders, main disconnects, or branch circuits in mid-sized installations, providing a balanced blend of protection and accessibility. Together, these specs translate to reliable protection for motors, pumps, compressors, and other three-phase equipment, helping to minimize downtime and equipment damage during electrical faults.\u003c\/p\u003e \u003ch3\u003eIdeal applications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacement or upgrade in commercial and light industrial panels\u003c\/li\u003e \u003cli\u003eProtection for 3-phase feeders in manufacturing lines, HVAC systems, and processing equipment\u003c\/li\u003e \u003cli\u003ePrimary or secondary protection in electrical distribution setups where 600 V class circuits are standard\u003c\/li\u003e \u003cli\u003eIntegrates with standard Square D panel configurations for straightforward installation\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical benefits and use cases\u003c\/h3\u003e\n\u003cp\u003eWhen you install the Square D HJA36125US, you’re choosing a component designed to fit into established Square D ecosystems, ensuring compatibility with existing breakers and mounting footprints. Use it as a main or feeder protection device in panels serving motors, conveyors, or other three-phase loads. Its 125 A rating provides robust protection for typical industrial loads, while the 600 V rating accommodates a wide range of equipment without compromising safety margin.\u003c\/p\u003e \u003ch3\u003eInstallation and compatibility tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eVerify panel compatibility and ensure the breaker type matches your Square D enclosure specifications\u003c\/li\u003e \u003cli\u003eConfirm the correct mounting and terminal torque as per the installation guidelines for safe, reliable connections\u003c\/li\u003e \u003cli\u003eUse as part of a coordinated protection scheme with upstream and downstream devices to optimize fault isolation\u003c\/li\u003e \u003cli\u003eInspect for any signs of wear or damage prior to installation and replace if corrosion or physical defects are present\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eMaintenance insight\u003c\/h3\u003e\n\u003cp\u003eFor long-term reliability, schedule periodic inspections of all connections and verify that protective settings remain within design specifications. Keep replacement parts like the HJA36125US on hand to minimize downtime in maintenance windows or during panel upgrades.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46423560814754,"sku":"HJA36125US","price":8686.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_229276d9-908d-46df-93e5-6fe31866e0ff.png?v=1765492975","url":"https:\/\/www.ampstate.com\/products\/square-d-hja36125us","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}