{"product_id":"cooper-bussmann-nsb-frs-r-4-1-industrial-fuses","title":"Cooper Bussmann NSB FRS-R-4-1 Industrial Fuses","description":"\u003cdiv\u003e\u003cp\u003eBussmann NSB FRS-R-4-1 Industrial Fuses are part of the Bussmann Fusetron FRS-R family, a dual-element, time-delay fuse designed for industrial protection. The FRS-R-4-1 is a 4 ampere, Class RK5 device rated for up to 600 VAC or 300 VDC, making it suitable for both AC mains and DC power feeds in control panels, power supplies, and motor-control circuits. It uses ferrule-end terminations to fit standard RK5 fuse holders, enabling straightforward replacement in rugged industrial environments. As a time-delay fuse, it tolerates brief inrush conditions common to motors and transformers while still interrupting fault currents to protect downstream components. The NSB designation identifies a specific Bussmann catalog variant within the FRS-R series, a lineup widely used in applications requiring reliable circuit protection. Typical uses include protecting power distribution lines, rectifier modules, and electrical drives in industrial equipment, where a balance of surge tolerance and fast fault interruption is essential for system safety and continuity.\u003c\/p\u003e\u003c\/div\u003e","brand":"Bussmann","offers":[{"title":"New","offer_id":51677538484526,"sku":null,"price":261.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_be885cc1-dbbf-42a9-be64-3d6bde41e55f.jpg?v=1769564319","url":"https:\/\/plgautomation.com\/products\/cooper-bussmann-nsb-frs-r-4-1-industrial-fuses","provider":"PLG Automation ","version":"1.0","type":"link"}