{"product_id":"a4j450","title":"A4J450 - 450 Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eA4J450 - 450 Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen your electrical systems are handling heavy loads, dependable circuit protection becomes more than just a requirement — it’s part of keeping operations moving. The Mersen A4J450 Amp-Trap® Class J Fast-Acting Fuse is designed to help protect commercial and industrial equipment from damaging overloads and short circuits before they lead to expensive downtime or equipment failure. Rated at 450 amps, this fast-acting fuse delivers quick fault interruption for applications where reliable power distribution and equipment protection are critical.\u003c\/p\u003e\n\u003cp\u003eThe A4J450 reacts fast when fault conditions occur, helping reduce the amount of damaging current that can pass through the system. That quick response can help you protect motors, transformers, switchgear, HVAC equipment, control panels, and other important electrical components from unnecessary stress and damage. In facilities where uptime matters, reducing fault-related damage can help lower maintenance costs and keep systems operating more efficiently.\u003c\/p\u003e\n\u003cp\u003eAnother benefit is the Class J rejection-style design, which helps prevent lower-rated fuses from being installed by mistake. That added level of protection supports safer maintenance practices and helps you maintain proper system coordination. The blade-style terminals provide secure installation in compatible fuse holders, while the durable GMG body is built for long-term use in demanding industrial and commercial environments.\u003c\/p\u003e\n\u003cp\u003eWith a 600VAC \/ 300VDC rating and a 200 kA interrupting capacity, the Mersen A4J450 is a practical choice for manufacturing facilities, electrical distribution systems, motor control centers, branch circuits, and heavy-duty equipment that require fast and dependable overcurrent protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e450 amp Class J fast-acting fuse:\u003c\/strong\u003e Designed for dependable overcurrent protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid response during overloads and short circuits:\u003c\/strong\u003e Helps reduce equipment damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent-limiting design:\u003c\/strong\u003e Helps reduce equipment damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproves electrical system safety and reliability:\u003c\/strong\u003e Supports dependable circuit protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass J rejection-style construction:\u003c\/strong\u003e Helps prevent incorrect replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh 200 kA interrupting rating:\u003c\/strong\u003e Designed for demanding fault-current conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for AC and DC applications:\u003c\/strong\u003e Supports commercial and industrial electrical systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlade terminal design:\u003c\/strong\u003e Provides secure installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass alloy terminals:\u003c\/strong\u003e Provide dependable conductivity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable GMG body:\u003c\/strong\u003e Designed for industrial and commercial environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eROHS compliant:\u003c\/strong\u003e Supports environmental compliance requirements.\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Mersen\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalog Number:\u003c\/strong\u003e A4J450\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Amp-Trap® A4J\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Class:\u003c\/strong\u003e Class J\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Type:\u003c\/strong\u003e Fast-Acting\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmp Rating:\u003c\/strong\u003e 450A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 600VAC \/ 300VDC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency:\u003c\/strong\u003e 50\/60 Hz\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupting Rating:\u003c\/strong\u003e 200 kA AC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Type:\u003c\/strong\u003e AC\/DC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Clip\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Type:\u003c\/strong\u003e Blade\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Material:\u003c\/strong\u003e Brass Alloy\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e GMG\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Diameter:\u003c\/strong\u003e 63.5 mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Length:\u003c\/strong\u003e 203.2 mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Weight:\u003c\/strong\u003e 1.3698 kg\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC\/EAN:\u003c\/strong\u003e 782001960476\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial Compliance and Certifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eROHS Compliant:\u003c\/strong\u003e Designed to support environmental compliance requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Voltage UL\/CSA Applications:\u003c\/strong\u003e Designed for Low Voltage UL\/CSA fuse applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for industrial and commercial electrical systems:\u003c\/strong\u003e Designed for dependable overcurrent protection.\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhere It Works Best\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe A4J450 works well in industrial equipment, motor control centers, manufacturing systems, branch circuits, HVAC applications, commercial electrical panels, and power distribution systems where fast overcurrent protection is important. It is especially useful in applications with high available fault current where protecting valuable electrical equipment and minimizing downtime are key priorities.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\n\u003cdiv\u003e\n\u003cblockquote\u003e\n\u003cp style=\"font-size: 12px;\"\u003e\u003cem\u003eUse of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer.\u003cstrong\u003e CIRCUIT BREAKER SUPERSTORE®\u003c\/strong\u003e is an independent reseller and is \u003cstrong\u003enot \u003c\/strong\u003ean authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do \u003cstrong\u003enot\u003c\/strong\u003e apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 12px;\"\u003e\u003cem\u003eMersen® is a registered trademark of Mersen S.A. Products sold are surplus, used, or refurbished and are \u003cstrong\u003eNOT \u003c\/strong\u003esupplied by Mersen S.A. or its affiliates.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Mersen","offers":[{"title":"New In Box","offer_id":50459155038507,"sku":"A4J450","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459155071275,"sku":"A4J450  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/a4j450","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}