{"product_id":"252150r3-s-c-electric-sm-4-100e-14-4kv-slow-power-fuse-refill-unit","title":"252150R3 - S\u0026C Electric SM-4 100E 14.4kV Slow Power Fuse Refill Unit","description":" \t\t\t\t\t\t\t\t\t\t\u003ch2\u003e252150R3\u003c\/h2\u003e                                         \u003cbr\u003e \t\t\t\t\t\t\t\t\t\t\u003cb\u003e252150R3\u003c\/b\u003e is an S\u0026amp;C Electric SM-4 Power Fuse Refill Unit designed for reliable overcurrent protection in outdoor distribution and substation applications. This slow-speed fuse unit is rated 100 amperes continuous and 14.4 kV nominal, offering precise melting time-current characteristics with only 10% total tolerance in melting current. The SM-4 Refill Unit features a silver or pretensioned nickel-chrome current-responsive fusible element drawn through precision dies to accurate diameters, with solderless construction brazed into terminals. Fast, positive fault interruption is achieved through high-speed elongation of the arc in the solid-material-lined bore and efficient deionizing action of gases generated through thermal reaction of the solid material. For low-magnitude faults, the large-diameter auxiliary bore delays arc extinction until sufficient gap is attained, precluding reignition in the main bore. For moderate-to-high faults, the arc is lengthened as the main rod is drawn upward into the main bore, with the large circumference providing greater surface exposure of the arc-extinguishing medium. \u003cul\u003e\n\u003cli\u003ePart Number: 252150R3\u003c\/li\u003e\n\u003cli\u003eManufacturer: S\u0026amp;C Electric\u003c\/li\u003e\n\u003cli\u003eFuse Type: SM-4 Refill Unit\u003c\/li\u003e\n\u003cli\u003eContinuous Current Rating: 100 amperes\u003c\/li\u003e\n\u003cli\u003eVoltage Rating: 14.4 kV nominal\u003c\/li\u003e\n\u003cli\u003eSpeed Classification: Slow\u003c\/li\u003e\n\u003cli\u003eFusible Element: Silver or pretensioned nickel-chrome\u003c\/li\u003e\n\u003cli\u003eConstruction: Solderless, brazed terminals\u003c\/li\u003e\n\u003cli\u003eMelting Current Tolerance: 10% total tolerance\u003c\/li\u003e\n\u003cli\u003eApplication: Outdoor distribution and substation protection\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: 252150R3\u003c\/li\u003e                                             \u003cli\u003eManufacturer : S\u0026amp;C Electric\u003c\/li\u003e\n\u003cli\u003eBrand : S\u0026amp;C Electric\u003c\/li\u003e\n\u003cli\u003eCategory : Fuse\u003c\/li\u003e\n\u003cli\u003eItem Subcategory : Medium Voltage\u003c\/li\u003e\n\u003cli\u003eType : SM-4\u003c\/li\u003e\n\u003cli\u003eVoltage : 14400\u003c\/li\u003e\n\u003cli\u003eAmperage : 100\u003c\/li\u003e\n\u003cli\u003eClass Rating : E\u003c\/li\u003e\n\u003cli\u003eVelocity : Slow\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\u003cli\u003eWeight : 2 \u003c\/li\u003e\u003c\/ul\u003e                                         \u003cbr\u003e                                          ","brand":"S\u0026C Electric","offers":[{"title":"New","offer_id":45109859385503,"sku":"252150R3-New","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Re-Certified","offer_id":45109859418271,"sku":"252150R3-ReCert","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0500\/2349\/7887\/files\/s-c-electric-fuse-new-252150r3-s-c-electric-sm-4-100e-14-4kv-slow-power-fuse-refill-unit-53820176662687.webp?v=1766010273","url":"https:\/\/essentialparts.com\/products\/252150r3-s-c-electric-sm-4-100e-14-4kv-slow-power-fuse-refill-unit","provider":"Essential Electric Supply","version":"1.0","type":"link"}