{"product_id":"lja36400u43x-square-d-400a-3-pole-600v-iline-solid-state-mccb","title":"Square D - LJA36400U43X 400A 3-Pole 600V I-Line Solid State Circuit Breaker","description":"\u003cp\u003eThe \u003cstrong\u003eSquare D LJA36400U43X\u003c\/strong\u003e is a 3-pole, 400-amp solid-state molded case circuit breaker (MCCB) rated for 600VAC with I-Line plug-in mounting. Manufactured by Schneider Electric, this LJ-frame breaker features an adjustable electronic solid-state trip unit for precise, selective overcurrent protection in high-capacity industrial feeder and main circuit applications. It combines high interrupting capacity with flexible trip settings for demanding three-phase 600V power systems.\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\u003eLJA36400U43X\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\u003eSolid State (Electronic)\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\u003e65kA @ 600V\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\u003eLJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAdjustable solid-state trip unit with long-time, short-time, and instantaneous settings for selective coordination\u003c\/li\u003e\n\u003cli\u003eI-Line plug-in mounting for fast installation in Square D LJ-frame I-Line switchboards\u003c\/li\u003e\n\u003cli\u003e400-amp capacity for heavy industrial main and feeder circuit protection\u003c\/li\u003e\n\u003cli\u003e3-pole for complete three-phase 600V protection\u003c\/li\u003e\n\u003cli\u003eHigh 65kA interrupting rating at 600V\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 and feeder breaker in heavy industrial I-Line switchboards\u003c\/li\u003e\n\u003cli\u003eMotor control center (MCC) main incoming protection\u003c\/li\u003e\n\u003cli\u003eLarge manufacturing plant main distribution panels\u003c\/li\u003e\n\u003cli\u003eProcess plant and refinery electrical distribution systems\u003c\/li\u003e\n\u003cli\u003eHigh fault-current industrial environments requiring 65kA interrupting\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhat is the Square D LJA36400U43X?\u003c\/h3\u003e\u003cp\u003eThe LJA36400U43X is a 400-amp, 3-pole, 600V solid-state I-Line plug-in MCCB from Square D used for main and feeder circuit protection in heavy industrial three-phase 600V electrical distribution systems.\u003c\/p\u003e\u003ch3\u003eWhat does U43X mean in the LJA36400U43X part number?\u003c\/h3\u003e\u003cp\u003eThe U43X suffix on Square D solid-state MCCBs identifies the rating plug configuration of the electronic trip unit, which determines the adjustable current range (pickup and delay settings) available on the breaker. Consult Schneider Electric documentation for the specific ranges associated with U43X.\u003c\/p\u003e\u003ch3\u003eIs the LJA36400U43X available as new and used?\u003c\/h3\u003e\u003cp\u003eYes. Alpha Brokers \u0026amp; Controls stocks the Square D LJA36400U43X in new condition. Contact us for current pricing and availability.\u003c\/p\u003e","brand":"Square D \/ Schneider Electric","offers":[{"title":"New","offer_id":48395611832568,"sku":"LJA36400U43X-N","price":2634.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/1209\/3176\/files\/EfSZpneA-LJA36400U33X_Illustration_Front.jpg?v=1778785499","url":"https:\/\/alphabreakersandcontrols.com\/products\/lja36400u43x-square-d-400a-3-pole-600v-iline-solid-state-mccb","provider":"Alpha Breakers \u0026 Controls","version":"1.0","type":"link"}