Bussmann® LOW-PEAK® LPN-RK Dual-Element, Time-Delay Fuses Class RK1 – 250 Volt ⁄Ω¡º-60A Dimensional Data 2" (± 0.31) *Meets all performance requirements of UL Standard 248-12 for Class RK1 fuses. 0.81" (± 0.008) 35A to 60A ⁄Ω¡ºA to 30A Catalog Symbol: LPN-RK_SP Dual-Element, Time-Delay – 10 seconds (minimum) at 500% rated current (8 seconds for 0-30A sizes) Current-Limiting Ampere Rating: ⁄Ω¡º to 60 Amperes Voltage Rating: 250 Volts AC (or less) Interrupting Rating: AC: 300,000A RMS Sym. DC: 50,000 Amperes Agency Approvals: UL Listed – Special Purpose*, Guide JFHR, File E56412 CSA Certified (200,000AIR), Class 1422-02, File 53787 Class RK1 per CSA C22.2, No. 248.12 3" (± 0.31) 0.56" (± 0.008) Features: • Current-limitation for maximum short-circuit protection. • Type 2 protection for IEC and NEMA starters when properly sized. • High inrush current motor protection. • Time-delay permits 130% FLA sizing for back-up motor protection. • Protection against single-phase motor damage. • Low watt loss power consumption. • Electrically isolated end caps. • 125 Vdc, U.L. Listed. Fuse Reducers For Class R Fuses Desired Fuse (Case) Size Equipment Fuse Clips 60A 100A 200A Catalog Number (Pairs) 250V 30A No. 263-R 30A No. 213-R 60A No. 216-R 60A No. 226-R Fuseblocks 30 Amp Case Catalog Numbers 1 Pole 2 Pole LPN-RK-⁄Ω¡ºSP LPN-RK-2SP LPN-RK-9SP Box Lug R25030-1CR R25030-2CR 3 Pole R25030-3CR LPN-RK-⁄fiΩ¡ººSP LPN-RK-2⁄Ω¢SP LPN-RK-10SP Screw R25030-1SR R25030-2SR R25030-3SR LPN-RK-¤Ω¡ºSP LPN-RK-2⁄Ω™SP LPN-RK-12SP R25030-2PR R25030-3PR LPN-RK-2°Ω¡ºSP LPN-RK-15SP Pressure Plate R25030-1PR LPN-RK-‹Ω¡ºSP LPN-RK-›Ω¡ºSP LPN-RK-3SP LPN-RK-17⁄Ω™SP 60 Amp Case LPN-RK-⁄Ω™SP LPN-RK-3¤Ω¡ºSP LPN-RK-20SP 1 Pole 2 Pole 3 Pole LPN-RK-flΩ¡ºSP LPN-RK-3⁄Ω™SP LPN-RK-25SP Box Lug R25060-1CR R25060-2CR R25060-3CR LPN-RK-°Ω¡ºSP LPN-RK-4SP LPN-RK-30SP Screw R25060-1SR R25060-2SR R25060-3SR LPN-RK-1SP LPN-RK-4⁄Ω™SP LPN-RK-35SP R25060-2PR R25060-3PR LPN-RK-5SP LPN-RK-40SP Pressure Plate R25060-1PR LPN-RK-1⁄Ω•SP LPN-RK-1⁄Ω¢SP LPN-RK-5flΩ¡ºSP LPN-RK-45SP LPN-RK-1›Ω¡ºSP LPN-RK-6SP LPN-RK-50SP LPN-RK-1flΩ¡ºSP LPN-RK-6⁄Ω¢SP LPN-RK-60SP LPN-RK-1°Ω¡ºSP LPN-RK-8SP 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. — Carton Quantity and Weight Ampere Ratings Weight** Carton Qty. Lbs. Kg. 0–30 10 0.5 0.227 35–60 10 1.2 0.544 **Weight per carton. 12-1-99 A99074 Rev. A Form No. LPN-RK 0-60 Page 1 of 2 BIF Doc #1003 Bussmann® LOW-PEAK® LPN-RK AMPERE RATING 60A 4 6.25 300 30A AMPERE RATING 15A 20A 300 ⁄Ω¡º-60A Time-Current Characteristic Curves–Average Melt .1 .15 .2 .3 .4 .6 1 1.6 2.5 3.2 5 8 10 12 .5 .8 1.25 2 Dual-Element, Time-Delay Fuses Class RK1 – 250 Volt 100 100 1 10 1,000 100 1 .1 .01 10 .1 RMS SYMMETRICAL CURRENT IN AMPERES TIME IN SECONDS TIME IN SECONDS 10 1 B 400,000 10,000 30 .01 1,000 60 10,000 20 100,000 100 AMPERE RATING .1 RMS SYMMETRICAL CURRENT IN AMPERES 200,000 10,000 1,000 100,000 A 1,000 INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS Current-Limitation Curves RMS SYMMETRICAL CURRENTS IN AMPERES A–B=ASYMMETRICAL AVAILABLE PEAK (2.3 x SYMM RMS AMPS) 12-1-99 A99074 Rev. A 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. Form No. LPN-RK 0-60 Page 2 of 2 BIF Doc #1003