{"product_id":"frn-r-300","title":"FRN-R-300 - 300Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eFRN-R-300 - 300Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Eaton Bussmann FRN‑R‑300 Fusetron Class RK5 Fuse delivers high‑performance circuit protection in industrial settings, engineered to guard your equipment against overloads and short circuits. With a hefty 300‑amp rating for 250 VAC and 125 VDC systems, this dual‑element, time‑delay cartridge fuse is built for scenarios with extreme current inrushes—think motors, transformers, and heavy‑duty panelboards. Its current‑limiting design keeps “let‑through” energy low when faults occur, while the blade‑end design ensures secure connection and easy installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual‑element time‑delay construction:\u003c\/strong\u003e Gives you two‑fold protection: it handles sustained overloads while still reacting fast to short circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent‑limiting performance:\u003c\/strong\u003e Significantly reduces the energy that passes during fault conditions, helping safeguard downstream machinery and wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh interrupting ratings:\u003c\/strong\u003e Up to 200 kA at 250 VAC and 20 kA at 125 VDC provide dependable protection even in heavy‑duty applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTime‑delay characteristic:\u003c\/strong\u003e (10 seconds minimum at 500% of rated current) makes it ideal for motor control circuits where high starting currents occur.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon‑indicating fuse:\u003c\/strong\u003e Allows for clean, functional integration while minimizing false trips — giving you reliability without unnecessary indication features.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 300 A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 250 VAC \/ 125 VDC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupting Rating:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e200 kA RMS at 250 VAC\u003c\/li\u003e\n\u003cli\u003e20 kA at 125 VDC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResponse Time:\u003c\/strong\u003e Minimum 10 seconds at 500% of rated current\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Class:\u003c\/strong\u003e RK5 (cartridge, blade‑end × blade‑end)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eLength: 8.63 in\u003c\/li\u003e\n\u003cli\u003eDiameter: 2.38 in\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e approx. 1.95 lbs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type:\u003c\/strong\u003e Blade end × blade end – designed for holder mount applications.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial Compliance and Certifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUL Listed:\u003c\/strong\u003e to Standard 248‑12, Guide JDDZ, File E4273.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCSA Certified:\u003c\/strong\u003e (C22.2 No. 248.12, Class 1422‑01, File 53787).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCE Marked:\u003c\/strong\u003e indicating conformity with applicable health, safety, and environmental standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhere It Works Best\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThis fuse fits best in industrial control and power distribution panels: motor control centers, disconnects servicing heavy motors or transformer loads, and power‑panelboards where high inrush is common. Its time‑delay nature makes it especially valuable in circuits where devices startup draw large current spikes (for example, large compressors, industrial HVAC, or manufacturing machinery). If you’re managing equipment that demands both overload and short‑circuit protection without unnecessary nuisance trips, this is the solution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\n\u003cdiv\u003e\n\u003cblockquote\u003e\n\u003cp style=\"font-size: 12px;\"\u003e\u003cem\u003eUse of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. All trademarks and registered trademarks are the property of their respective owners.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Mersen","offers":[{"title":"New In Box","offer_id":50459190329643,"sku":"FRN-R-300","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459190362411,"sku":"FRN-R-300  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0848\/0758\/1995\/files\/FRNR400copy.png?v=1745357095","url":"https:\/\/store.circuitbreakersuperstore.com\/products\/frn-r-300","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}