{"product_id":"square-d-lja36400u33x-400a-600v-3-pole-plug-in-circuit-breaker","title":"Square D LJA36400U33X - 400 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSquare D LJA36400U33X\u003c\/strong\u003e is a high‑capacity 400 A, 600 V, 3‑pole plug‑in molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short‑circuit protection in panelboards and load centers. The plug‑in design enables fast installation and easy replacement, helping minimize downtime during upgrades or maintenance.\u003c\/p\u003e \u003cp\u003eInside, a thermal‑magnetic trip unit provides stable, repeatable protection. The thermal element handles normal overloads with precision, while the magnetic element responds aggressively to high‑energy short circuits, interrupting current quickly to protect equipment and wiring.\u003c\/p\u003e \u003cp\u003eDesigned to integrate with matching OEM load centers and panelboards, this 3‑pole breaker ensures proper fit, reliable bus connection, and coordinated protection across three‑phase distributions. It’s well suited for residential, commercial, and light industrial applications where robust protection and quick serviceability are priorities.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug‑in connection\u003c\/strong\u003e for quick installation and painless replacement, reducing field wiring time and downtime.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal‑magnetic trip unit\u003c\/strong\u003e delivers stable protection across varying loads and ambient conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM‑compatible fit\u003c\/strong\u003e with matching Square D load centers and panelboards for seamless integration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3‑pole design\u003c\/strong\u003e ideal for three‑phase distribution and high‑demand branch circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600 V rating\u003c\/strong\u003e suitable for higher‑voltage commercial and light industrial applications.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e LJA36400U33X\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 400 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 \u003cp\u003eUse this breaker to upgrade or equip panelboards and load centers that demand heavy‑duty branch protection. Whether you’re restoring a critical commercial system or extending a light industrial distribution network, the LJA36400U33X delivers reliable protection with install efficiency and OEM alignment that reduces rework and ensures long‑lasting performance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355324960930,"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_48255708-89a0-453b-84f0-2f6c48e8a70e.png?v=1764691345","url":"https:\/\/www.ampstate.com\/products\/square-d-lja36400u33x-400a-600v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}