Fusetron® FRN-R Dual-Element, Time-Delay Fuses Class RK5 – 250 Volt 70-600A Dimensions - in 5.88” 1.06” 70 to 100A 7.13” 1.56” 110 to 200A 8.63” ± 0.094 2.38” ± 0.020 225 to 400A 10.38” ± 0.094 2.88” ± 0.020 Catalog Symbol: FRN-R † Current-Limiting Dual-element, time-delay – 10 seconds (minimum) at 500% rated current Amp Rating: 70 to 600A Voltage Rating: 250Vac (or less) 125Vdc (110-200A) 250Vdc (225-600A) Interrupting Rating: 200,000A RMS Sym. 20,000A dc Agency Information: CE, 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 - Amp Rating 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 FRN-R-90 FRN-R-225 FRN-R-600 FRN-R-100 FRN-R-250 — FRN-R-110 FRN-R-300 — 450 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 amp rating of the fuse for a minimum of ten seconds. Fuse Reducers For Class R Fuses Equipment Fuse Clips 200A 400A Carton Quantity and Weight Weight* Amp 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 600A Desired Fuse (Case) Size 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). *Weight per carton. † To obtain information for 0-60A, access Data Sheet: 1019 or 1169 (8-60A with indication) 0709 BU-SB08920 Page 1 of 3 Catalog Number (Pairs) 250V Data Sheet 1020 Class RK5 Fuse Blocks (250V) Catalog Data (Clip Retaining Spring Standard, Suffix “R”) Amps 70 to 100 Poles 1 2 3 1 110 to 200 3 1 225 to 400 3 1 450 to 600 3 Terminal Type (Suffix No.) Basic Box Lug w/ Catalog — Reinforced Clip Number CU only R25100-1 CR COR R25100-2 CR COR R25100-3 CR COR R25200-1 CR — R25200-3 CR — R25400-1 CR — R25400-3 CR — R25600-1 CR — R25600-3 CR — Recommended fuseblocks for Class R 250V fuses See Data Sheet 1110 400 600 200 100 60 Time-Current Characteristic Curves–Average Melt Form 250 Rev. A Note: 60 amp fuse is ferrule style. Curve is shown for relative performance only. 0709 BU-SB08920 Page 2 of 3 Data Sheet 1020 Peak Current In Amps Current-Limitation Curves RMS Symmetrical Currents In Amps A–B=Asymmetrical Available Peak (2.3 x Symm RMS Amps) The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper 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. Cooper Bussmann reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Cooper 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. © 2009 Cooper Bussmann St. Louis, MO 63178 www.cooperbussmann.com 0709 BU-SB08920 Page 3 of 3 Data Sheet 1169