Bussmann® Fusetron® FRN-R Dual-Element, Time-Delay Fuses Class RK5 – 250 Volt 70-600A Dimensional Data 5.88" (± 0.062) 1.06" (± 0.008) 70A to 100A 7.13" (± 0.062) 1.56" (± 0.008) 110A to 200A 8.63" (± 0.094) 2.06" (± 0.008) 225A to 400A 10.38" (± 0.094) Catalog Symbol: FRN-R † Current-Limiting Dual-Element, Time-Delay – 10 seconds (minimum) at 500% rated current Ampere Rating: 70 to 600A Voltage Rating: 250Vac (or less) 125Vdc (70-200A) 250Vdc (201-600A) Interrupting Rating: 200,000A RMS Sym. 20,000A AIC Agency Information: UL Listed, Std. 248-12, Class RK5, Guide JDDZ, File E4273 CSA Certified, C22.2 No. 248.12, Class 1422-01, File 53787 Catalog Numbers 2.59" (± 0.008) 450A to 600A General Information: • Provides motor overload, ground fault and short-circuit protection. • Helps protect motors against burnout from overloads and single phasing when sized properly. • Simplifies and improves blackout prevention (selective coordination). • Dual-element fuses can be applied in circuits subject to temporary motor overloads and surge currents to provide both high performance short-circuit and overload protection. • The overload element provides protection against low level overcurrent of overloads and will hold on inrush current which is five times greater than the ampere rating of the fuse for a minimum of ten seconds. FRN-R-70 FRN-R-125 FRN-R-350 FRN-R-75 FRN-R-150 FRN-R-400 FRN-R-80 FRN-R-175 FRN-R-450 FRN-R-85 FRN-R-200 FRN-R-500 Fuse Reducers For Class R Fuses FRN-R-90 FRN-R-225 FRN-R-600 FRN-R-100 FRN-R-250 — Equipment Fuse Clips FRN-R-110 FRN-R-300 — 200A 400A Carton Quantity and Weight Weight* Ampere Ratings Carton Qty. Lbs. Kg. 70–100 5 1.5 0.680 101–200 1 0.77 0.349 201–400 1 1.52 0.689 401–600 1 3.0 1.4 *Weight per carton. † To obtain information for 0-60A, access Data Sheet: 1019 4-2-03 SB03091 600A Desired Fuse (Case) Size Catalog Number (Pairs) 250V 100A No. 2621-R 100A No. 2641-R 200A No. 242-R 100A No. 2661-R 200A No. 2662-R 400A No. 2664-R* *Single reducer only (pair not required). CE logo denotes compliance with European Union Low Voltage Directive (50-1000Vac, 75-1500Vdc). Refer to Data Sheet: 8002 or contact Bussmann Application Engineering at 636-527-1270 for more information. Form No. FRN-R 70-600 Page 1 of 3 Data Sheet: 1020 Bussmann® Fusetron® FRN-R Dual-Element, Time-Delay Fuses Class RK5 – 250 Volt 70-600A AMPERE RATING 600 400 300 200 100 Time-Current Characteristic Curves–Average Melt Recommended fuseblocks for Class R 250V fuses See Data Sheet 1110 100 TIME IN SECONDS 10 1 .1 40,000 10,000 1,000 100 .01 CURRENT IN AMPERES 4-2-03 SB03091 Form No. FRN-R 70-600 Page 2 of 3 Data Sheet: 1020 Bussmann® Fusetron® FRN-R Dual-Element, Time-Delay Fuses Class RK5 – 250 Volt 70-600A Current-Limitation Curves The only controlled copy of this Data Sheet is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications. 4-2-03 SB03091 Form No. FRN-R 70-600 Page 3 of 3 Data Sheet: 1020