343 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. special application fuses barrier network fuse 242 series 242 series barrier network fuse please refer to www.littelfuse.com/series/242.html for current information. 242 series barrier network fuse 242 series description agency approvals agency agency file number ampere range recognized under the components program of underwriters laboratories (jdyx2-10480) 0.050 - 0.250 a electrical characteristics features applications % of ampere rating opening time 100% 4 hours, minimum 300% 10 seconds, maximum 1000% 0.002 seconds, maximum u i i ? > ? i i ? ? - > ? ` > ` ? -
x ? ? ? ? for hazardous applications. u ? } ? ? ? i ? ? ? ? } rating. meets the 1500a minimum. u ? > ? ? > l ? i ? ? l ? ? > y ? > ? lead and surface mount. electrical characteristics ampere rating (a) amp code body color coding interrupting rating nominal cold resistance (ohms) nominal melting i 2 t (a 2 sec.) agency approvals 0.050 .050 red 4000a @ 250vac/vdc 11.34 0.000103 x 0.080 .080 green 8.19 0.000214 x 0.100 .100 ? ? i 3.60 0.000977 x 0.160 .160 violet 3.00 0.00157 x 0.200 .200 ? ? 2.68 0.0038 x 0.250 .250 ? > v ? 1.6 0.00579 x / ? i { - i ? i ? ? > a > ` ? ? ? > i > l > ? i ? i ? ? v ? ? i offers a range of fuses designed to enable greater safety ? ? i > ? ? } i ? i v ? ? ? v i ? ? ? ? i ? ? ? ? ? ? ? i ? ? > ? ? t i y ? ? ? ? ? ? i i ? ? ? ? ? ? i ? ? u / t ? i ? ? ? i v i ` electrical equipment; electrical connections and components, test equipment revised: september 20, 2011
introduction to circuit protection introduction to circuit protection transientology 344 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. special application fuses barrier network fuse 242 series 242 series barrier network fuse please refer to www.littelfuse.com/series/242.html for current information. average time current curves 0.1 0.01 0.001 0.0001 1 10 100 time in seconds .050a .080a .100a .200a .125a .160a .250a 0.01 0.1 1 10 100 1000 current in amperes re?ow condition pb C free assembly pre heat - temperature min (t s(min) ) 150c - temperature max (t s(max) ) 200c - time (min to max) (t s ) 60 C 180 secs average ramp up rate (liquidus temp (t l ) to peak 5c/second max t s(max) to t l - ramp-up rate 5c/second max re?ow - temperature (t l ) (liquidus) 217c - temperature (t l ) 60 C 150 seconds peak temperature (t p ) 250 +0/-5 c time within 5c of actual peak temp. (t p ) 20 C 40 seconds ramp-down rate 5c/second max time 25c to peak temperature (t p ) 8 minutes max. do not exceed 260c soldering parameters product characteristics dimensions 3.02 mm (.119") 8.40 mm (.331") 4.60 mm (.181" ) 1.90 mm (.075") 3.02 mm (.119") 8.40 mm (.331") 4.60 mm (.181" ) 2.90mm 3.20mm 9.80mm 1.90 mm (.075") .635 mm (.025") operating temperature C40 o c to 125 o c. thermal shock withstands 5 cycles of C 55 o c to 125 o c vibration per mil-std-202f insulation resistance (after opening) greater than 10,000 ohms. part numbering system 0242.050uat1 series amp code quantity & packaging code refer to amp code column in the electrical speci?cations table. / r ? ? ? v ? ] y ? > ? i > ` i ` ] ? ? ? * > v ? / / > ? i 1 / r x ? ? ? v ? ] y ? > ? i > ` i ` ] ? ? ? * > v ? / / > ? i 1 , r x ? ? ? v ? ] - ? v > v i ? ? ? ] / > ? i e , i i ? wave soldering 260c, 10 seconds max. time temperature t p t l t s(max) t s(min) 25 t p t l t s time to peak temperature (t 25oc to peak) ramp-down ramp-up preheat critical zone t l to t p
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