{"product_id":"mersen-a4by800-class-l-limiting-fuse-quick-delivery","title":"A4BY800 | Mersen \/ Ferraz Shawmut A4BY Series Class L 800A 600VAC Current Limiting Fuse","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp\u003eThe Mersen \/ Ferraz Shawmut A4BY800 is an 800 amp Class L current-limiting fuse engineered for high-current protection in low-voltage electrical systems. It provides dependable interruption of overloads and short-circuit faults in industrial and commercial power distribution applications.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 99.964%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eMersen \/ Ferraz Shawmut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eFuses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eA4BY800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eClass L Fuse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eETIM Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eEC002704\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eFuse Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eCurrent Limiting Low Voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eA4BY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eIndication Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eNon-Indicating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eRejection Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eRejection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eAmperage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003e800 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003e600 VAC \/ 300 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eInterrupt Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003e200 kA at 600 VAC \/ 100 kA at 300 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eFuse Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eClass L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eResponse Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003e4 s at 500% overload\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eElement Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eDual Element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eTerminal Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eBlade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eMounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eBolted-On\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eBody Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eCylindrical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eBody Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003eFiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0503%;\"\u003e\u003cstrong\u003eBody Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.8166%;\"\u003e2.5 in Dia × 8.625 in L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About A4BY800\u003c\/h4\u003e\n\u003cp\u003eThe A4BY800 is part of the Mersen \/ Ferraz Shawmut A4BY fuse family, designed for demanding low-voltage, high-current protection requirements. Its dual-element current-limiting construction reduces let-through energy during fault conditions, helping protect downstream conductors and equipment. The rejection-style design ensures proper installation only in compatible Class L fuse holders, reducing the risk of incorrect replacement. Typical applications include industrial switchgear, main feeders, and power distribution systems requiring high interrupting capacity and consistent protection performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA4BY Series Construction: Designed for low-voltage, high-current industrial protection applications.\u003c\/li\u003e\n\u003cli\u003eClass L Current Limiting Performance: Minimizes peak fault currents to protect electrical systems and equipment.\u003c\/li\u003e\n\u003cli\u003eHigh Interrupting Capacity: Rated at 200 kA at 600 VAC for severe short-circuit conditions.\u003c\/li\u003e\n\u003cli\u003eDual-Element Fuse Design: Provides time-delay characteristics for overloads and rapid response to fault currents.\u003c\/li\u003e\n\u003cli\u003eRejection-Type Configuration: Prevents improper fuse installation by enforcing holder compatibility.\u003c\/li\u003e\n\u003cli\u003eNon-Indicating Operation: Suitable for systems where external fuse status monitoring is used.\u003c\/li\u003e\n\u003cli\u003eBolted Blade Terminals: Ensures secure, low-resistance connections in high-current installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe A4BY800 delivers the reliability and precision required for protecting high-capacity power distribution circuits in industrial electrical environments.\u003c\/p\u003e","brand":"Mersen \/ Ferraz Shawmut","offers":[{"title":"Default Title","offer_id":48738089992490,"sku":"A4BY800","price":285.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/A4BY800_1.webp?v=1718714967","url":"https:\/\/iqelectro.com\/products\/mersen-a4by800-class-l-limiting-fuse-quick-delivery","provider":"IQElectro","version":"1.0","type":"link"}