{"product_id":"square-d-lh36400-400a-600v-3-pole-plug-in-circuit-breaker","title":"Square D LH36400 - 400 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D LH36400 — a rugged 400 A, 600 V, 3-pole plug-in molded case circuit breaker engineered to shield your electrical system from overcurrent and short-circuit events. Built for dependable protection in panelboards and load centers, it delivers fast installation and reliable performance when it matters most.\u003c\/p\u003e \u003ch3\u003eWhy the LH36400 stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003eFast plug-in connection\u003c\/b\u003e for quick installation and seamless replacement, minimizing downtime during upgrades or service calls.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eThermal-magnetic trip unit\u003c\/b\u003e provides stable, repeatable protection by detecting both gradual overloads and instantaneous short circuits, helping to prevent damage to downstream equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eOEM-compatible design\u003c\/b\u003e engineered to work with matching Square D load centers and panelboards, ensuring proper fit, coordinated trip settings, and reliable performance.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eBuilt for versatility\u003c\/b\u003e ideal for residential, commercial, and light industrial applications where large branch circuits require robust protection and easy upkeep.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat it does for your electrical system\u003c\/h3\u003e\n\u003cp\u003eThe LH36400 protects branch circuits from overcurrent and short circuits, safeguarding wiring, devices, and downstream equipment. Its molded-case construction adds physical durability, while the plug-in mounting simplifies commissioning, maintenance, and part replacements. Whether you're upgrading existing panels or configuring new installations, this breaker delivers predictable trip characteristics and long-term reliability.\u003c\/p\u003e \u003ch3\u003eTechnical at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003eManufacturer:\u003c\/b\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePart number:\u003c\/b\u003e LH36400\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eType:\u003c\/b\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eAmperage rating:\u003c\/b\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eVoltage rating:\u003c\/b\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eNumber of poles:\u003c\/b\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMounting style:\u003c\/b\u003e Plug-in\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eApplications:\u003c\/b\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWho should consider this breaker\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eElectricians and facilities teams upgrading panelboards or load centers that handle high-current feeders\u003c\/li\u003e \u003cli\u003eCommercial spaces and light industrial environments needing reliable 400 A protection\u003c\/li\u003e \u003cli\u003eProjects requiring quick swap-ins or replacements with compatible Square D OEM equipment\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the Square D LH36400 for a dependable, high-capacity plug-in solution that aligns with your panelboard ecosystem, delivers precise protection, and keeps downtime to a minimum. It’s the practical choice when performance matters as much as simplicity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355323715746,"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_fdf8fb1b-2b5b-40d2-8b2c-9cdd2fae8f09.png?v=1764691321","url":"https:\/\/www.ampstate.com\/products\/square-d-lh36400-400a-600v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}