{"product_id":"a4by1200","title":"A4BY1200 - 1200Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eA4BY1200 - 1200Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLooking for a high-performance fuse that won’t let you down when the stakes are high? The Mersen A4BY1200 Amp-Trap® Class L Time-Delay Fuse is built for professionals who need reliable overcurrent protection in demanding industrial and commercial electrical systems. Rated for 600VAC and 300VDC, this 1200 amp powerhouse is perfect for protecting service entrance equipment, feeder circuits, and circuit breakers. Its smart time-delay design lets normal current surges pass without tripping, while still delivering fast protection during serious fault conditions.\u003c\/p\u003e\n\u003cp\u003eWith 4-second minimum time delay at 500% rating, the A4BY1200 coordinates seamlessly with ground fault relays, ensuring your system stays safe without unnecessary interruptions. Designed with silver-plated copper blade terminals and a durable insulating body, it guarantees consistent performance and conductivity in even the toughest environments. And with a massive 200 kA interrupting rating, this fuse can handle high fault currents to keep your equipment protected.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1200 Amp Class L fuse for heavy-duty electrical systems\u003c\/li\u003e\n\u003cli\u003eTime-delay design that handles startup surges without nuisance trips\u003c\/li\u003e\n\u003cli\u003e600VAC \/ 300VDC rating works for AC and DC applications\u003c\/li\u003e\n\u003cli\u003e200 kA interrupting rating protects against high fault currents\u003c\/li\u003e\n\u003cli\u003e100% rated device – safe at continuous full load\u003c\/li\u003e\n\u003cli\u003eCoordinates with ground fault relays thanks to 4-second minimum time delay at 500%\u003c\/li\u003e\n\u003cli\u003eSilver-plated copper blade terminals for reliable conductivity\u003c\/li\u003e\n\u003cli\u003eBolted mounting design ensures a secure, stable installation\u003c\/li\u003e\n\u003cli\u003eIdeal for service entrance, feeder circuits, and switchgear protection\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 A4BY1200\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Class L Time-Delay Fuse\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e A4BY\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmpere Rating:\u003c\/strong\u003e 1200A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Class:\u003c\/strong\u003e Class L\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Rating AC:\u003c\/strong\u003e 600VAC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Rating DC:\u003c\/strong\u003e 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\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharacteristic:\u003c\/strong\u003e Time Delay\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Bolted\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 Silver-Plated Copper\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulating Material:\u003c\/strong\u003e GMG\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Length:\u003c\/strong\u003e 273 mm\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 Weight:\u003c\/strong\u003e 1.9414 kg\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\u003eUL and CSA approved for low-voltage fuse applications\u003c\/li\u003e\n\u003cli\u003eRated for 600VAC UL and 300VDC UL operation\u003c\/li\u003e\n\u003cli\u003eMade with industrial-grade insulating materials and high-quality conductive components\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\u003eIndustrial plants and factories\u003c\/li\u003e\n\u003cli\u003eCommercial power distribution\u003c\/li\u003e\n\u003cli\u003eService entrance and feeder circuits\u003c\/li\u003e\n\u003cli\u003eSwitchgear and switchboard protection\u003c\/li\u003e\n\u003cli\u003eLarge motor control systems\u003c\/li\u003e\n\u003cli\u003eUtility and critical infrastructure projects\u003c\/li\u003e\n\u003cli\u003eBackup power and mission-critical distribution\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":50459152056619,"sku":"A4BY1200","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459152089387,"sku":"A4BY1200  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/a4by1200","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}