{"product_id":"mja36300-square-d-molded-case-circuit-breaker-i-line-plug-in-300-amp-3-pole-600-volt","title":"MJA36300 - Square D - Molded Case Circuit Breaker I-Line Plug-In - 300 Amp - 3 Pole - 600 Volt","description":"\u003cdiv class=\"tab-content--body tab-content--body--description\" id=\"tabb5a7adde1af5c87d7fd797b6245c2a39\"\u003e\n\u003ch2 class=\"tab-content--heading-text\" data-uw-rm-heading=\"prs\"\u003eDescription\u003c\/h2\u003e\nOperating as a 300A, 3-pole molded case circuit breaker, the MJA36300 belongs to the Square D PowerPacT M-Frame series. It is built for commercial and industrial electrical distribution systems. This unit mounts into Square D I-Line panelboards and switchboards. It also serves as a reliable replacement for legacy MA and MH frame breakers, simplifying facility upgrades. Equipped with an ET 1.0 electronic trip unit, it provides precise LI protection. It features a 65kAIC rating at 480VAC.\u003c\/div\u003e\n\u003cdiv class=\"tab-content--body jsSpecificationsBlock tab-content--body--specifications\" id=\"tab17989744c0ba77bb014035ff2d0a5e50\"\u003e\n\u003cspan id=\"specifications\"\u003e\u003c\/span\u003e\n\u003ch2 class=\"tab-content--heading-text\" data-uw-rm-heading=\"prs\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"specification-sheet jsProductUpdate jsProductReplace\" data-spec-profile=\"breaker-molded\"\u003e\n\u003ctable class=\"spec-detail-table\"\u003e\n\u003ccaption class=\"spec-group-caption\"\u003eKey specifications\u003c\/caption\u003e\n\u003ctbody class=\"spec-detail-rows\"\u003e\n\u003ctr class=\"spec-priority-row\" data-spec-key=\"vendor\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e\u003ca class=\"spec-link\" href=\"https:\/\/superbreakers.com\/collections\/schneider-electric-square-d-circuit-breakers\" title=\"Shop all Square D circuit breakers\" data-spec-link=\"brand\" data-uw-rm-brl=\"PR\" data-uw-original-href=\"\/collections\/schneider-electric-square-d-circuit-breakers\"\u003eSquare D\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-priority-row\" data-spec-key=\"series\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eSeries\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e\u003ca class=\"spec-link\" href=\"https:\/\/superbreakers.com\/collections\/schneider-electric-square-d-circuit-breakers?filter.p.m.breakers.series=MJA\" title=\"Shop Square D MJA circuit breakers\" data-spec-link=\"series\" data-uw-rm-brl=\"PR\" data-uw-original-href=\"\/collections\/schneider-electric-square-d-circuit-breakers?filter.p.m.breakers.series=MJA\"\u003eMJA\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-priority-row\" data-spec-key=\"amperage\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eAmperage\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e\u003ca class=\"spec-link\" href=\"https:\/\/superbreakers.com\/collections\/schneider-electric-square-d-circuit-breakers?filter.p.m.breakers.amperage=300A\u0026amp;filter.p.m.breakers.amperage=300\" title=\"Shop Square D 300A circuit breakers\" data-spec-link=\"amperage\" data-uw-rm-brl=\"PR\" data-uw-original-href=\"\/collections\/schneider-electric-square-d-circuit-breakers?filter.p.m.breakers.amperage=300A\u0026amp;filter.p.m.breakers.amperage=300\"\u003e300A\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-priority-row\" data-spec-key=\"poles\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003ePoles\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e\u003ca class=\"spec-link\" href=\"https:\/\/superbreakers.com\/collections\/schneider-electric-square-d-circuit-breakers?filter.p.m.breakers.poles=3\" title=\"Shop Square D 3-pole circuit breakers\" data-spec-link=\"poles\" data-uw-rm-brl=\"PR\" data-uw-original-href=\"\/collections\/schneider-electric-square-d-circuit-breakers?filter.p.m.breakers.poles=3\"\u003e3\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-priority-row\" data-spec-key=\"mounting\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eMounting Style\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e\u003ca class=\"spec-link\" href=\"https:\/\/superbreakers.com\/collections\/schneider-electric-square-d-circuit-breakers?filter.p.m.breakers.mounting_style=I-Line\" title=\"Shop Square D I-Line circuit breakers\" data-spec-link=\"mounting\" data-uw-rm-brl=\"PR\" data-uw-original-href=\"\/collections\/schneider-electric-square-d-circuit-breakers?filter.p.m.breakers.mounting_style=I-Line\"\u003eI-Line\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-priority-row\" data-spec-key=\"voltage\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eVoltage\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e240VAC, 480VAC, 600VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-priority-row\" data-spec-key=\"phase\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003ePhase\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-priority-row\" data-spec-key=\"interrupting_rating\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eAIC Rating\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable class=\"spec-detail-table\"\u003e\n\u003ccaption class=\"spec-group-caption\"\u003eFit and installation\u003c\/caption\u003e\n\u003ctbody class=\"spec-detail-rows\"\u003e\n\u003ctr data-spec-key=\"frame_type\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eFrame Type\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e\u003ca class=\"spec-link\" href=\"https:\/\/superbreakers.com\/collections\/schneider-electric-square-d-circuit-breakers?filter.p.m.breakers.series=MJA\" title=\"Shop Square D MJA circuit breakers\" data-spec-link=\"frame_type\" data-uw-rm-brl=\"PR\" data-uw-original-href=\"\/collections\/schneider-electric-square-d-circuit-breakers?filter.p.m.breakers.series=MJA\"\u003eMJA\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"terminal_connection\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eTerminal Type\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003eLugs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"for_use_with\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eFor Use With\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003eSquare D I-Line Panelboards, Switchboards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"wire_gauge\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eWire Gauge\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e(3) 3\/0 AWG-500 kcmil (Al\/Cu)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"max_wire\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eMax Wire\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e500 kcmil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"min_wire\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eMin Wire\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e3\/0 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable class=\"spec-detail-table\"\u003e\n\u003ccaption class=\"spec-group-caption\"\u003eProtection and operation\u003c\/caption\u003e\n\u003ctbody class=\"spec-detail-rows\"\u003e\n\u003ctr data-spec-key=\"trip_technology\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eTrip Technology\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003eElectronic Trip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"trip_function_code\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eTrip Function Code\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003eLI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"trip_function\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eTrip Function\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003eLong-Time, Instantaneous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"trip_adjustability\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eTrip Adjustability\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003eFixed Thermal, Adjustable Magnetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable class=\"spec-detail-table\"\u003e\n\u003ccaption class=\"spec-group-caption\"\u003eStandards and features\u003c\/caption\u003e\n\u003ctbody class=\"spec-detail-rows\"\u003e\n\u003ctr data-spec-key=\"available_options\" data-line=\"spec\" data-spec-wide=\"\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eAvailable Options\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003eShunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Rotary Handle, Lug Kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"accessories\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eAccessories\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003eLugs (AL800M23K)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"standards\" data-line=\"spec\" data-spec-wide=\"\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eStandards\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003eCSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"approval\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eApproval\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003eCE, CSA, IEC, NOM, UL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"temperature_rating\" data-line=\"spec\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eTemp Rating\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e-25C to 70C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-spec-key=\"construction_features\" data-line=\"spec\" data-spec-wide=\"\"\u003e\n\u003cth scope=\"row\"\u003e\u003cspan\u003eConstruction Features\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003eCurrent Limiting, HACR Rated, Non-Interchangeable Trip, 80% Rated, Mercury Free, PVC Free, Push-to-Trip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Square D \/ Schneider Electric","offers":[{"title":"New","offer_id":67576197939448,"sku":"MJA36300-N","price":4265.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/1209\/3176\/files\/MJA36300-1.webp?v=1791220606","url":"https:\/\/alphabreakersandcontrols.com\/products\/mja36300-square-d-molded-case-circuit-breaker-i-line-plug-in-300-amp-3-pole-600-volt","provider":"Alpha Breakers \u0026 Controls","version":"1.0","type":"link"}