{"product_id":"a4j80-mersen-80a-600v-class-j-fast-acting-cartridge-blade-fuse","title":"Mersen A4J80 — 80A 600V Class J Fast-Acting Fuse | Amp-Trap® A4J Series","description":" \t\t\t\t\t\t\t\t\t\t\u003ch2\u003eA4J80\u003c\/h2\u003e                                         \u003cbr\u003e \t\t\t\t\t\t\t\t\t\t\u003cdiv class=\"product-description\"\u003e   \u003ch2\u003eMersen A4J80 — 80A 600V Class J Fast-Acting Current-Limiting Fuse\u003c\/h2\u003e   \u003cp\u003e     The \u003cstrong\u003eMersen A4J80\u003c\/strong\u003e is an 80-ampere, 600VAC \/ 300VDC Class J fast-acting current-limiting fuse from the Amp-Trap® A4J series. Engineered for demanding industrial and commercial power distribution environments, this fuse provides reliable overcurrent and short-circuit protection with a 200kA AC \/ 100kA DC interrupting rating — one of the highest available in its class.   \u003c\/p\u003e   \u003cp\u003e     As a rejection-type Class J fuse, the A4J80's unique blade terminal dimensions physically prevent substitution with fuses of lower voltage ratings, lower interrupt ratings, or reduced current-limiting capability — a critical safety feature in critical infrastructure applications.   \u003c\/p\u003e   \u003ch3\u003eKey Specifications\u003c\/h3\u003e   \u003ctable\u003e     \u003ctbody\u003e       \u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eMersen (formerly Ferraz Shawmut)\u003c\/td\u003e\n\u003c\/tr\u003e       \u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003eA4J80\u003c\/td\u003e\n\u003c\/tr\u003e       \u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eAmp-Trap® A4J\u003c\/td\u003e\n\u003c\/tr\u003e       \u003ctr\u003e\n\u003cth\u003eAmpere Rating\u003c\/th\u003e\n\u003ctd\u003e80A\u003c\/td\u003e\n\u003c\/tr\u003e       \u003ctr\u003e\n\u003cth\u003eVoltage Rating\u003c\/th\u003e\n\u003ctd\u003e600VAC \/ 300VDC\u003c\/td\u003e\n\u003c\/tr\u003e       \u003ctr\u003e\n\u003cth\u003eInterrupt Rating\u003c\/th\u003e\n\u003ctd\u003e200kA AC \/ 100kA DC\u003c\/td\u003e\n\u003c\/tr\u003e       \u003ctr\u003e\n\u003cth\u003eFuse Class\u003c\/th\u003e\n\u003ctd\u003eClass J (Rejection-Type)\u003c\/td\u003e\n\u003c\/tr\u003e       \u003ctr\u003e\n\u003cth\u003eSpeed\u003c\/th\u003e\n\u003ctd\u003eFast-Acting\u003c\/td\u003e\n\u003c\/tr\u003e       \u003ctr\u003e\n\u003cth\u003eTerminal Type\u003c\/th\u003e\n\u003ctd\u003eBlade (Clip Mount)\u003c\/td\u003e\n\u003c\/tr\u003e       \u003ctr\u003e\n\u003cth\u003eBody Material\u003c\/th\u003e\n\u003ctd\u003eCylindrical, Polyester\u003c\/td\u003e\n\u003c\/tr\u003e       \u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e1-1\/8\" Dia × 4-1\/2\" L (26.92mm × 117.6mm)\u003c\/td\u003e\n\u003c\/tr\u003e       \u003ctr\u003e\n\u003cth\u003eCertifications\u003c\/th\u003e\n\u003ctd\u003eUL Listed, CSA Certified, RoHS Compliant\u003c\/td\u003e\n\u003c\/tr\u003e     \u003c\/tbody\u003e   \u003c\/table\u003e   \u003ch3\u003eApplications\u003c\/h3\u003e   \u003cul\u003e     \u003cli\u003eLoad centers and panelboards\u003c\/li\u003e     \u003cli\u003eSwitchboards and bus duct systems\u003c\/li\u003e     \u003cli\u003eFeeder circuit protection\u003c\/li\u003e     \u003cli\u003eCapacitor bank protection\u003c\/li\u003e     \u003cli\u003eLighting and heating circuits\u003c\/li\u003e     \u003cli\u003eGeneral-purpose commercial and industrial loads\u003c\/li\u003e     \u003cli\u003eBranch circuit breaker backup protection\u003c\/li\u003e   \u003c\/ul\u003e   \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e   \u003cdl\u003e     \u003cdt\u003e\u003cstrong\u003eWhat is the Mersen A4J80?\u003c\/strong\u003e\u003c\/dt\u003e     \u003cdd\u003eThe Mersen A4J80 is an 80-amp, 600VAC\/300VDC Class J fast-acting current-limiting fuse from the Amp-Trap® A4J series, designed for short-circuit and overcurrent protection in industrial and commercial power distribution systems.\u003c\/dd\u003e     \u003cdt\u003e\u003cstrong\u003eWhat is the interrupt rating of the A4J80?\u003c\/strong\u003e\u003c\/dt\u003e     \u003cdd\u003eThe A4J80 carries a 200kA interrupting rating at AC voltage and 100kA at DC voltage, making it suitable for high-fault-current installations.\u003c\/dd\u003e     \u003cdt\u003e\u003cstrong\u003eIs the A4J80 a rejection-type fuse?\u003c\/strong\u003e\u003c\/dt\u003e     \u003cdd\u003eYes. The A4J80 is a rejection-type Class J fuse. Its blade terminal dimensions are dimensionally unique and prevent the insertion of lower-rated, non-current-limiting fuses — a built-in safety design.\u003c\/dd\u003e     \u003cdt\u003e\u003cstrong\u003eWhat certifications does the Mersen A4J80 carry?\u003c\/strong\u003e\u003c\/dt\u003e     \u003cdd\u003eThe A4J80 is UL Listed, CSA Certified (to C22.2 standards), and RoHS compliant.\u003c\/dd\u003e     \u003cdt\u003e\u003cstrong\u003eIs Ferraz Shawmut A4J80 the same as Me \t\t\t\t\t\t\t\t\t\t\u003cbr\u003e                                          \t\t\t\t\t\t\t\t\t\t\u003ch3\u003e\u003cb\u003eSpecifications\u003c\/b\u003e\u003c\/h3\u003e \t\t\t\t\t\t\t\t\t\t\u003cul\u003e \t\t\t\t\t\t\t\t\t\t\t\u003cli\u003ePart Number: A4J80\u003c\/li\u003e                                             \u003cli\u003eManufacturer : Mersen\u003c\/li\u003e\n\u003cli\u003eBrand : Mersen\u003c\/li\u003e\n\u003cli\u003eCategory : Fuse\u003c\/li\u003e\n\u003cli\u003eItem Subcategory : Low Voltage Fuse\u003c\/li\u003e\n\u003cli\u003eFamily : Amp-Trap\u003c\/li\u003e\n\u003cli\u003eType : A4J\u003c\/li\u003e\n\u003cli\u003eVoltage : 600\u003c\/li\u003e\n\u003cli\u003eAmperage : 80\u003c\/li\u003e\n\u003cli\u003eAIC rating : 200kA@600V\u003c\/li\u003e\n\u003cli\u003eDiameter : 1.13\u003c\/li\u003e\n\u003cli\u003eClass Rating : J\u003c\/li\u003e\n\u003cli\u003eBarrels : 1\u003c\/li\u003e \t\t\t\t\t\t\t\t\t\t\u003c\/ul\u003e                                         \u003cbr\u003e                                         \u003ch3\u003e\u003cb\u003eProduct Data\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUPC : 782001960308\u003c\/li\u003e\n\u003cli\u003eGTIN : 00782001960308\u003c\/li\u003e\n\u003cli\u003eCountry of Origin : Mexico\u003c\/li\u003e\n\u003cli\u003eDimensions : x 4.63 in x\u003c\/li\u003e\n\u003cli\u003eWeight : 0.24 lb\u003c\/li\u003e\n\u003c\/ul\u003e                                         \u003cbr\u003e                                          \u003c\/strong\u003e\u003c\/dt\u003e\n\u003c\/dl\u003e\n\u003c\/div\u003e","brand":"Mersen","offers":[{"title":"New","offer_id":42301394387103,"sku":"A4J80-New","price":99.66,"currency_code":"USD","in_stock":true},{"title":"Re-Certified","offer_id":44539810283679,"sku":"A4J80-ReCert","price":41.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0500\/2349\/7887\/files\/A4J80_0.jpg?v=1724975884","url":"https:\/\/essentialparts.com\/products\/a4j80-mersen-80a-600v-class-j-fast-acting-cartridge-blade-fuse","provider":"Essential Electric Supply","version":"1.0","type":"link"}