{"product_id":"a4j400","title":"A4J400 - 400 Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eA4J400 - 400 Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Mersen A4J400 Amp-Trap® Class J fuse is designed for your electrical systems that need fast, dependable protection during overloads and short-circuit conditions. Rated at 400 amps, this fast-acting fuse helps protect your electrical equipment and power distribution systems by interrupting fault current before it can cause more serious damage. In commercial and industrial environments where downtime can quickly become expensive, reliable overcurrent protection is an important part of keeping systems operating safely.\u003c\/p\u003e\n\u003cp\u003eThe A4J400 reacts quickly when fault conditions occur, helping reduce stress on motors, transformers, control panels, HVAC equipment, and other connected electrical components. Its current-limiting design helps lower the amount of fault energy moving through the circuit, which can help you reduce equipment damage and improve overall system protection.\u003c\/p\u003e\n\u003cp\u003eThis fuse also features a Class J rejection-style design that helps prevent incorrect fuse replacement with lower-rated alternatives. That added level of protection can help support safer maintenance practices and more reliable electrical system performance. The blade-style terminals provide secure installation in compatible fuse holders, while the GMG insulating body is built for long-term use in demanding operating environments.\u003c\/p\u003e\n\u003cp\u003eWith a 600VAC \/ 300VDC rating and a high 200 kA interrupting capacity, the Mersen A4J400 is commonly used in industrial machinery, branch circuits, motor control centers, commercial electrical systems, and power distribution equipment where fast fault interruption is important.\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\u003e400 amp Class J fast-acting fuse:\u003c\/strong\u003e Designed for dependable overcurrent protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelps protect equipment from overloads and short circuits:\u003c\/strong\u003e Supports reliable circuit protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast response:\u003c\/strong\u003e Helps reduce damage during fault conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent-limiting design:\u003c\/strong\u003e Helps lower fault energy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass J construction:\u003c\/strong\u003e Helps prevent incorrect fuse 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 material:\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 A4J400\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 400A\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 54 mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Length:\u003c\/strong\u003e 181.1 mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Weight:\u003c\/strong\u003e 0.7938 kg\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC\/EAN:\u003c\/strong\u003e 782001960452\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 A4J400 works well in industrial equipment, manufacturing systems, HVAC applications, motor control centers, branch circuits, and electrical distribution systems where fast overcurrent protection is needed. It is especially useful in applications with high available fault current where protecting valuable electrical equipment and reducing unexpected downtime are important 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":50459154907435,"sku":"A4J400","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459154940203,"sku":"A4J400  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/a4j400","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}