{"product_id":"121050r3-s-c-electric-sm-4-refill-unit-50e-amp-14-4kv-power-fuse","title":"121050R3 - S\u0026C Electric SM-4 Refill Unit 50E Amp 14.4kV Power Fuse","description":" \t\t\t\t\t\t\t\t\t\t\u003ch2\u003e121050R3\u003c\/h2\u003e                                         \u003cbr\u003e \t\t\t\t\t\t\t\t\t\t\u003cb\u003e121050R3\u003c\/b\u003e is an S\u0026amp;C Electric SM-4 Refill Unit Power Fuse designed for outdoor substation applications with a continuous current rating of 50E amperes at 14.4 kV nominal voltage. This refill unit features a silver or pretensioned nickel-chrome current-responsive fusible element with solderless, brazed terminal construction for reliable fault interruption. The SM-4 series utilizes high-speed arc elongation in a solid-material-lined bore combined with efficient deionizing action to achieve fast, positive fault interruption across a range of fault magnitudes. The precision-drawn fusible element provides melting time-current characteristics with only 10% total tolerance in melting current, ensuring superior coordination with protective relays and other fuses compared to standard fuses with 20% tolerance. \u003cul\u003e\n\u003cli\u003ePart Number: 121050R3\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: 50E Amperes\u003c\/li\u003e\n\u003cli\u003eVoltage Rating: 14.4 kV Nominal\u003c\/li\u003e\n\u003cli\u003eFusible Element: Silver or Pretensioned Nickel-Chrome\u003c\/li\u003e\n\u003cli\u003eTerminal Construction: Solderless, Brazed\u003c\/li\u003e\n\u003cli\u003eApplication: Outdoor Substation Protection\u003c\/li\u003e\n\u003cli\u003eMelting Tolerance: 10% Total Tolerance\u003c\/li\u003e\n\u003cli\u003eQuality Standard: ISO 9001:2000 Certified\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: 121050R3\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 : 7200\u003c\/li\u003e\n\u003cli\u003eAmperage : 30\u003c\/li\u003e\n\u003cli\u003eClass Rating : E\u003c\/li\u003e\n\u003cli\u003eVelocity : Standard\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":45137157488799,"sku":"121050R3-New","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Re-Certified","offer_id":45137157521567,"sku":"121050R3-ReCert","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0500\/2349\/7887\/files\/121050R3.webp?v=1759868361","url":"https:\/\/essentialparts.com\/products\/121050r3-s-c-electric-sm-4-refill-unit-50e-amp-14-4kv-power-fuse","provider":"Essential Electric Supply","version":"1.0","type":"link"}