{"product_id":"s-c-electric-company-121200-r4-refill-fuse-unit","title":"S\u0026C Electric Company 121200-R4 Refill Fuse Unit","description":"\u003cdiv\u003e\u003cp\u003eThe S\u0026amp;C Electric Company 121200R4 SM-4 Refill Fuse Unit is a 7.2 kV nominal, 8.3 kV maximum refill module rated at 125E (125 A), designed to drop directly into SM-4 and SML-4 fuse holders as a field‑replaceable element. This refill unit is part of S\u0026amp;C’s SM‑4 family and is also listed as suitable for SME‑4Z holders, enabling coordinated protection for indoor distribution feeders. With a 125 A ampere rating and a 7.2 kV nominal rating, it refills a blown fuse in three‑phase SM‑4 configurations without replacing the entire fuse assembly, supporting rapid system restoration after a fault. The 121200R4 variant specifically targets 7.2 kV systems; higher‑voltage variants in the same family, such as 122200R4 (14.4 kV nominal), exist for different installation needs.\u003c\/p\u003e\u003c\/div\u003e","brand":"S\u0026C","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46284106137834,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-022.png?v=1788727428","url":"https:\/\/gtghardware.com\/products\/s-c-electric-company-121200-r4-refill-fuse-unit","provider":"GTG Hardware","version":"1.0","type":"link"}