{"product_id":"a4by400-55al-mersen-a4by-400a-600v-class-l-time-delay-fuse","title":"A4BY400-55AL - Mersen A4BY 400A 600V Class L Time Delay Fuse","description":" \t\t\t\t\t\t\t\t\t\t\u003ch2\u003eA4BY400-55AL\u003c\/h2\u003e                                         \u003cbr\u003e \t\t\t\t\t\t\t\t\t\t\u003cb\u003eA4BY400-55AL\u003c\/b\u003e is a Mersen Amp-Trap Class L time-delay fuse rated for 400 amperes at 600 volts AC and 300 volts DC, designed to protect service entrance equipment, feeder circuits, and circuit breakers. This current-limiting fuse features a 4-second minimum time delay at 500 percent rating, allowing it to pass normal current surges while coordinating with ground fault relays. The cylindrical body with plated terminals provides superior reliability in harsh environments, and blade-stamped catalog numbers ensure permanent identification. \u003cul\u003e\n\u003cli\u003eAmperage Rating: 400A\u003c\/li\u003e\n\u003cli\u003eVoltage Rating: 600V AC \/ 300V DC\u003c\/li\u003e\n\u003cli\u003eFuse Class: Class L\u003c\/li\u003e\n\u003cli\u003eSpeed Characteristic: Time Delay (4-second minimum)\u003c\/li\u003e\n\u003cli\u003eAC Interrupting Rating: 200,000 AIC\u003c\/li\u003e\n\u003cli\u003eDC Interrupting Rating: 100,000 AIC\u003c\/li\u003e\n\u003cli\u003ePhysical Size: 2 inches x 8 5\/8 inches\u003c\/li\u003e\n\u003cli\u003eCurrent Limiting: Yes\u003c\/li\u003e\n\u003cli\u003eUL Listed to Standard 248-10 (601-6000A), File E2137\u003c\/li\u003e\n\u003cli\u003eCSA Certified to Standard C22.2 No. 248.10\u003c\/li\u003e\n\u003cli\u003eOperating Frequency: 50\/60 Hz\u003c\/li\u003e\n\u003c\/ul\u003eAt \u003cb\u003eEssential Parts\u003c\/b\u003e, we offer \u003cb\u003efast shipping\u003c\/b\u003e, \u003cb\u003elowest price\u003c\/b\u003e, and \u003cb\u003eexpert support\u003c\/b\u003e to help you get the right product every time. \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: A4BY400-55AL\u003c\/li\u003e                                             \u003cli\u003eManufacturer : Mersen\u003c\/li\u003e\n\u003cli\u003eBrand : Ferraz Shawmut\u003c\/li\u003e\n\u003cli\u003eCategory : Fuse\u003c\/li\u003e\n\u003cli\u003eItem Subcategory : Fuse Part\u003c\/li\u003e\n\u003cli\u003eFamily : Amp-Trap\u003c\/li\u003e\n\u003cli\u003eType : A4BY\u003c\/li\u003e\n\u003cli\u003eVoltage : 600\u003c\/li\u003e\n\u003cli\u003eAmperage : 400\u003c\/li\u003e\n\u003cli\u003eAIC rating : 200kA@600V\u003c\/li\u003e\n\u003cli\u003eConnection : Bolt-In\u003c\/li\u003e\n\u003cli\u003eBarrels : 1\u003c\/li\u003e\n\u003cli\u003eVelocity : TD - Time Delay\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\u003cul\u003e\n\u003cli\u003eUPC : 78200193781\u003c\/li\u003e\n\u003cli\u003eGTIN : 00782001937812\u003c\/li\u003e\n\u003cli\u003eWeight : 4 \u003c\/li\u003e\n\u003c\/ul\u003e                                         \u003cbr\u003e                                          ","brand":"Ferraz Shawmut","offers":[{"title":"New","offer_id":45030957449375,"sku":"A4BY400-55AL-New","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Re-Certified","offer_id":45031187513503,"sku":"A4BY400-55AL-ReCert","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0500\/2349\/7887\/files\/A4BY400.png?v=1757705797","url":"https:\/\/essentialparts.com\/products\/a4by400-55al-mersen-a4by-400a-600v-class-l-time-delay-fuse","provider":"Essential Electric Supply","version":"1.0","type":"link"}