{"product_id":"la36400-square-d-400a-3-pole-600v-iline-mccb","title":"Square D - LA36400 400A 3-Pole 600V I-Line Plug-In Circuit Breaker","description":"\u003cp\u003eThe \u003cstrong\u003eSquare D LA36400\u003c\/strong\u003e is a 3-pole, 400-amp thermal magnetic molded case circuit breaker (MCCB) rated for 600VAC with I-Line plug-in mounting. Manufactured by Schneider Electric, the LA-frame breaker delivers high-capacity overcurrent and short-circuit protection for large industrial feeder and main circuits. The I-Line plug-in interface allows for fast installation and replacement in compatible Square D switchboards and panelboards, making it a standard choice for heavy industrial power distribution.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eLA36400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eSquare D \/ Schneider Electric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage Rating\u003c\/td\u003e\n\u003ctd\u003e400A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Rating\u003c\/td\u003e\n\u003ctd\u003e600VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Poles\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrip Type\u003c\/td\u003e\n\u003ctd\u003eThermal Magnetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type\u003c\/td\u003e\n\u003ctd\u003eI-Line Plug-In\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterrupting Rating\u003c\/td\u003e\n\u003ctd\u003e30kA @ 480V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eUL 489 Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame Series\u003c\/td\u003e\n\u003ctd\u003eLA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eI-Line plug-in design for quick installation and removal in Square D I-Line switchboards\u003c\/li\u003e\n\u003cli\u003eThermal magnetic trip for reliable overload and instantaneous short-circuit protection\u003c\/li\u003e\n\u003cli\u003e400-amp capacity for high-current main and feeder circuit protection\u003c\/li\u003e\n\u003cli\u003e3-pole design for three-phase 600VAC industrial distribution systems\u003c\/li\u003e\n\u003cli\u003eLA frame standard in Square D I-Line switchboard applications\u003c\/li\u003e\n\u003cli\u003eUL 489 Listed, NEC compliant\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e400A main or feeder breaker in industrial I-Line switchboards\u003c\/li\u003e\n\u003cli\u003eLarge motor control center (MCC) incoming feeder protection\u003c\/li\u003e\n\u003cli\u003eHeavy manufacturing plant distribution panels\u003c\/li\u003e\n\u003cli\u003eIndustrial sub-main circuit protection at 600V\u003c\/li\u003e\n\u003cli\u003eUtility and process industry high-capacity power distribution\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhat is the Square D LA36400?\u003c\/h3\u003e\u003cp\u003eThe Square D LA36400 is a 400-amp, 3-pole, 600V thermal magnetic I-Line plug-in MCCB used as a main or feeder circuit breaker in heavy industrial and commercial three-phase 600VAC switchboards and panelboards.\u003c\/p\u003e\u003ch3\u003eWhat is the interrupting rating of the LA36400?\u003c\/h3\u003e\u003cp\u003eThe Square D LA36400 has a standard interrupting capacity of 30kA at 480V. This is suitable for most industrial distribution systems; for higher available fault current environments, consider the LJA36400U43X with a solid-state trip and higher interrupting rating.\u003c\/p\u003e\u003ch3\u003eWhat is the difference between LA36400 and LJA36400U43X?\u003c\/h3\u003e\u003cp\u003eThe LA36400 uses a thermal magnetic trip unit (fixed settings), while the LJA36400U43X uses an adjustable solid-state electronic trip unit, offering higher interrupting capacity and flexible protection coordination. The LJA is preferred for systems requiring selective coordination or higher fault-current protection.\u003c\/p\u003e","brand":"Square D \/ Schneider Electric","offers":[{"title":"New","offer_id":48395624939768,"sku":"LA36400-N","price":1019.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/1209\/3176\/files\/Photoroom_20260302_154526.jpg?v=1778785708","url":"https:\/\/alphabreakersandcontrols.com\/products\/la36400-square-d-400a-3-pole-600v-iline-mccb","provider":"Alpha Breakers \u0026 Controls","version":"1.0","type":"link"}