Technical Data 1003 Effective March 2017 Supersedes July 2015 LPN-RK — 250 Vac/125 Vdc, 1⁄10-60 A, dual element, time-delay fuses Catalog no. Catalog symbols: • LPN-RK(amp)SP (non-indicating) • LPN-RK(amp)SPI (indicating) Description: Ultimate protection Class RK1 dual element, current-limiting, time-delay fuses available with optional open fuse indication. Time-delay – 10 seconds (minimum) at 500% of rated current (8 seconds for 0-30A sizes). LPN-RK-1/10SP LPN-RK-2SP LPN-RK-9SP LPN-RK-15/100SP LPN-RK-21/4SP LPN-RK-10SP LPN-RK-2/10SP LPN-RK-21/2SP LPN-RK-12SP LPN-RK-3/10SP LPN-RK-28/10SP LPN-RK-15SP LPN-RK-4/10SP LPN-RK-3SP LPN-RK-1/2SP LPN-RK-32/10SP LPN-RK-20SP LPN-RK-6/10SP LPN-RK-31/2SP LPN-RK-25SP LPN-RK-8/10SP LPN-RK-4SP LPN-RK-30SP LPN-RK-1SP LPN-RK-41/2SP LPN-RK-35SP* LPN-RK-11/8SP LPN-RK-5SP LPN-RK-40SP* LPN-RK-11/4SP LPN-RK-56/10SP LPN-RK-45SP* LPN-RK-14/10SP LPN-RK-6SP LPN-RK-50SP* LPN-RK-16/10SP LPN-RK-61/4SP LPN-RK-60SP* LPN-RK-18/10SP LPN-RK-8SP * Open fuse indication available by inserting the suffix “I,” e.g. LPN-RK-50SPI. Requires 75Vac minimum voltage. Carton quantity • • Volts • 250 Vac • 125 Vdc • Amps 1/10-60A • IR • 300 kA Vac RMS Sym. • 100kA Vdc Agency Information • UL Listed, Guide JDDZ, File E4273 • CSA Certified, Class 1422-02, File 53787, Class RK1 per CSA C22.2, No. 248.12 • CE 10 Features and benefits • Industry’s only UL Listed and CSA Certified fuse with a 300 kA interrupting rating that allows for simple, worry-free installation in virtually any application. • Fast short-circuit protection and dual-element, time-delay performance provide ultimate protection. • Reduces existing fuse inventory by up to 33% when upgrading to Low-Peak fuses. • Consistent 2:1 ampacity ratios for all Low-Peak fuses make selective coordination easy. • Time-delay permits 130% FLA sizing for back-up motor protection. • Current-limitation protects downstream components against damaging thermal and magnetic effects of short-circuit currents. • Protects against single-phase motor damage. • Proper sizing can provide “no damage” Type 2 coordinated protection for NEMA and IEC motor controllers. Specifications: Ratings LPN-RK-171/2SP Technical Data 1003 LPN-RK — 250 Vac/125 Vdc, 1⁄10-60 A, dual element, time-delay fuses Effective March 2017 Time-current curves - average melt Recommended fuse blocks 2-Pole RM25030-2_ RM25060-2_ 3-Pole RM25030-3_ RM25060-3_ For additional information on the 250 volt fuse blocks, see data sheets no. 10289. Fuse reducers for Class R fuses Desired fuse (case) Equipment fuse clips size 60 A 30 A 30 A 100 A 60 A 200 A 60 A Dimensions — in 3 0.56 1/10 to 30 A AMP RATING 100 Catalog no. (pairs) 250V NO.263-R NO.213-R NO.216-R NO.226-R For additional information on Class R fuse reducers, see data sheet no. 1118. 2 300 0.1 0.15 0.2 0.3 0.4 .50 0.6 0.8 1 1.25 1.6 2 2.5 3.2 4 5 6.25 8 10 12 Amps 30 60 1/10 to 12 amps 0.81 10 TIME IN SECONDS Catalog no. 1-Pole RM25030-1_ RM25060-1_ 1 35 to 60 A 2 Eaton.com/bussmannseries 1000 CURRENT IN AMPS 100 10 0.1 0.01 1 0.1 Technical Data 1003 LPN-RK — 250 Vac/125 Vdc, 1⁄10-60 A, dual element, time-delay fuses Effective March 2017 Time-current curves - average melt Current-limitation curves 15 to 60 amps B 300,000 AMP RATING INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS 100 10 100,000 90,000 80,000 70,000 60,000 50,000 40,000 30,000 20,000 60A 10,000 9000 8000 7000 6000 30A 5000 4000 3000 A 2000 200,000 300,000 80,000 100,000 60,000 40,000 30,000 20,000 8000 10,000 6000 4000 3000 2000 1000 1000 TIME IN SECONDS 200,000 AMP RATING 60A 300 30A 15A 20A 400,000 RMS SYMMETRICAL CURRENT IN AMPS A-B = ASYMMETRICAL AVAILABLE PEAK (2.3 X SYM RMS AMPS) 1 Current-limiting effects CURRENT IN AMPS 10,000 1000 20 0.01 100 0.1 Prosp. S.C.C. — 1000 2000 3000 5000 10,000 15,000 20,000 25,000 30,000 35,000 Let-through current (apparent RMS Sym. vs. fuse rating) 30 A 60 A 1000 1000 1000 1000 1000 1000 1000 2000 1000 2000 1000 2000 1000 3000 1000 3000 2000 3000 2000 3000 40,000 50,000 60,000 70,000 80,000 90,000 100,000 150,000 200,000 250,000 300,000 2000 2000 2000 2000 2000 2000 2000 2000 3000 3000 3000 3000 3000 3000 3000 4000 4000 4000 4000 5000 5000 6000 Eaton.com/bussmannseries 3 Technical Data 1003 LPN-RK — 250 Vac/125 Vdc, 1⁄10-60 A, dual element, time-delay fuses Effective March 2017 The only controlled copy of this data sheet is the electronic read-only version located on the Eaton 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. Eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Eaton 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. Eaton 1000 Eaton Boulevard Cleveland, OH 44122 Eaton.com Bussmann Division 114 Old State Road Ellisville, MO 63021 United States Eaton.com/bussmannseries © 2017 Eaton All Rights Reserved Printed in USA Publication No. 1003 — BU-SB13686 March 2017 Eaton.com/bussmannseries Eaton, Bussmann and Low-Peak are valuable trademarks of Eaton in the U.S. and other countries. You are not permitted to use the Eaton trademarks without prior written consent of Eaton. CSA is a registered trademark of the Canadian Standards Group. UL is a registered trademark of the Underwriters Laboratories, Inc. 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