technical data 10413 effective august 2015 supersedes july, 2015 250v kwn-r and 600v kws-r class rk1 fuses catalog symbols: ? kwn-r-(amp) 250v ? kws-r-(amp) 600v description: 250v kwn-r and 600v kws-r fast-acting limitron? fuses are ul listed as class rk1 fuses. they are dual voltage rated and can be applied at 250vac/dc and 600vac/dc respectively with interrupting ratings of 200ka ac and 20ka dc. ratings ? volts ? 250vac/dc kwn-r ? 600vac/dc kws-r ? amps 1-60a ? interrupting rating ? 200ka ac ? 20ka dc agency information ? ce ? ul listed, std. 248-12, class rk1, guide jddz, file e4273 ? csa certified, c22.2 no. 248.12, class 1422-02, file 53787 250v kwn-r catalog numbers (amp) kwn-r-1 kwn-r-15 kwn-r-50 kwn-r-3 kwn-r-20 kwn-r-60 kwn-r-5 kwn-r-25 kwn-r-6 kwn-r-30 kwn-r-10 kwn-r-40 600v kws-r catalog numbers (amp) kws-r-1 kws-r-15 kws-r-40 kws-r-3 KWS-R-20 kws-r-50 kws-r-5 kws-r-25 kws-r-60 kws-r-6 kws-r-30 kws-r-10 kws-r-35 kwn-r and kws-r carton quantity amp rating carton qty. 1C60 10 bussmann series
2 technical data 10413 effective august 2015 eaton.com/bussmannseries features: ? high dc voltage ratings for critical industrial or commercial applications that have specific current limitation requirements. ? 10x better current limitation than basic circuit breakers and non- current limiting fuses helps prevent damage caused by short- circuit events ? 200ka ac interrupting ratings comply with nec ? section 110.9 for todays large capacity systems ? 20ka dc interrupting ratings help meet the needs of protecting higher ampacity dc circuits ? incorporates class r rejection feature. installation in a rejection base fuse block is recommended as it helps prevent a lesser- rated fuse from being installed. however, both kwn-r and kws-r fuses can be inserted in non-rejection type fuse holders to physically and electrically replace fast-acting class h, rk1, k5, rk5 and other fast-acting fuses. recommended fuse blocks: fuse amps 1-pole 2-pole 3-pole 250v kwn-r 0-30 rm25030-1_ rm25030-2_ rm25030-3_ 35-60 rm25060-1_ rm25060-2_ rm25060-3_ 600v kws-r 0-30 rm60030-1_ rm60030-2_ rm60030-3_ 35-60 rm60060-1_ rm60060-2_ rm60060-3_ see data sheet no. 10289 for details. fuse reducers for class r fuses: equipment fuse clips desired fuse (case) size catalog numbers (pairs) 250v 600v 60a 30a no.263-r no.663-r 100a 30a no.213-r no.216-r 60a no.216-r no.616-r 200a 60a no.226-r no.626-r for additional information on class r fuse reducers, see data sheet no. 1118. dimensions - in: 250v kwn-r 600v kws-r 1/10 to 30a 0.56" ( 0.008) 2" ( 0.31) 35 to 60a 0.81" ( 0.008) 3" ( 0.31) 1/10 to 30a 0.81" ( 0.008) 5" ( 0.31) 35 to 60a 1.06" ( 0.008) 5.5" ( 0.31) 250v kwn-r and 600v kws-r class rk1 fuses
3 technical data 10413 effective august 2015 eaton.com/bussmannseries time-current curves average melt kwn-r and kws-r current in amps time in seconds 300 100 10 1 0.1 0.01 40 100 1000 10,000 30a 60a amp rating 250v kwn-r and 600v kws-r class rk1 fuses
technical data 10413 effective august 2015 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. current limitation curves kwn-r and kws-r 60 amp rating 30 inst anta neous peak let- through current in amps 400,000 100,000 10,000 1000 1000 10,000 100,00 0 200,00 0 rms symmetrical currents in amps a?b=asymmetrical available peak (2.3 x sym rms amps) a b 250v kwn-r and 600v kws-r class rk1 fuses eaton is a registered trademark. all other trademarks are property of their respective owners. eaton 1000 eaton boulevard cleveland, oh 44122 eaton.com bussmann division 114 old state road ellisville, mo 63021 united states eaton.com/bussmannseries ? 2015 eaton all rights reserved printed in usa publication no. 10413 bu-sb15296 august 2015
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