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 600 Amperes Voltage Rating: 250 Volts AC (or less) Interrupting Rating: 200,000A RMS Sym. DC Ratings: 20,000 AIC @ 125 VDC 70-400 Amperes 20,000 AIC @250 VDC 401-600 Amperes Agency Approvals: 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 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 — Carton Qty. 70–100 101–200 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. Fuse Reducers For Class R Fuses Equipment Fuse Clips Carton Quantity and Weight Ampere Ratings 200A Desired Fuse (Case) Size Catalog Number (Pairs) 250V 100A No. 2621-R 100A No. 2641-R 0.680 200A No. 242-R 0.349 100A No. 2661-R Weight* Lbs. Kg. 5 1.5 1 0.77 201–400 1 1.52 0.689 401–600 1 3.0 1.4 *Weight per carton. 2.59" (± 0.008) 400A 600A 200A No. 2662-R 400A No. 2664-R* *Single reducer only (pair not required). † To obtain information for 0-60 Amps, access BIF # 1019 CE logo denotes compliance with European Union Low Voltage Directive (50-1000 VAC, 75-1500 VDC). Refer to BIF document #8002 or contact Bussmann Application Engineering at 636-527-1270 for more information. 11-1-00 A00115 Form No. FRN-R 70-600 Page 1 of 3 BIF Doc #1020 Bussmann® Fusetron® FRN-R Dual-Element, Time-Delay Fuses Class RK5 – 250 Volt 70-600A Fuseblocks for Class R Fuses Time-Current Characteristic Curves–Average Melt Amps 70 Poles 1 to 2 R25100-2 CR COR 100 3 R25100-3 CR COR to 200 1 R25200-1 CR — to 400 1 R25400-1 CR — to 600 1 R25600-1 CR — AMPERE RATING 600 300 400 Terminal Type (Suffix No.) Box Lug w/ — Clip CU only CR COR 200 Basic Catalog Number R25100-1 100 (Clip Retaining Spring Standard, Suffix “R”) 100 TIME IN SECONDS 10 1 .1 40,000 10,000 1,000 100 .01 CURRENT IN AMPERES 11-1-00 A00115 Form No. FRN-R 70-600 Page 2 of 3 BIF Doc #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 BIF document 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. 11-1-00 A00115 Form No. FRN-R 70-600 Page 3 of 3 BIF Doc #1020