341 ? 2009 littelfuse, inc. specifcations 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 ? meets barrier network standards (en50020) for hazardous applications. ? high interrupting rating. meets the 1500a minimum. ? available in both axial 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 blue 3.60 0.000977 x 0.160 .160 violet 3.00 0.00157 x 0.200 .200 brown 2.68 0.0038 x 0.250 .250 black 1.6 0.00579 x the 242 series hazardous area barrier network fuse offers a range of fuses designed to enable greater safety operating electronic equipment within potentially explosive environments. ? type i protected electrical equipment; electrical connections and components, test equipment revised: january 21, 2011
introduction to circuit protection introduction to circuit protection transientology 342 ? 2009 littelfuse, inc. specifcations 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 10 0 10 0 10 1 0.1 0.0 1 0.0 01 1 10 1 000 0.1 time in seconds current in amperes 242 s eries .050 a .080 a .1 00 a .1 60 a .20 0 a .250 a .1 25 a refow condition p ree assemly pre heat - temperature min (t s(min) ) 5c - temperature max (t s(max) ) 2c - time (min to max) (t s ) secs average ramp up rate (liquidus temp (t l ) to peak 5csecond max t s(max) to t l - ramp-up rate 5csecond max refow - temperature (t l ) (liquidus) 2c - temperature (t l ) 5 seconds peak temperature (t p ) 25 -5 c time within 5c of actual peak temp. (t p ) 2 seconds ramp-down rate 5csecond max time 25c to peak temperature (t p ) minutes max. do not exceed 2c soldering parameters product characteristics dimensions 3.02 mm ( .1 19") 8.40 mm (.331") 4.00mm 4.60 mm (.18 1" ) 1.90 mm (. 075") 3.02 mm ( .1 19") 8.40 mm (.331") 4.60 mm (.18 1" ) 2.90mm 3.20mm 9.80mm 1.90 mm (. 075") .635 mm (.025") operating temperature 40 o c to 125 o c. thermal shock ithstands 5 cycles of 55 o c to 125 o c vibration per mistd202f insulation resistance (after opening) greater than 10000 ohms. part numbering system 0242.050uat1 series amp code quantity & pac ka ging code refer to amp code column in the electrical specications table. hat1 = 100 pcs, axial leaded, ammo pack t1 tape uat1 = 500 pcs, axial leaded, ammo pack t1 tape ur = 500 pcs, surface mount, tape & reel wave soldering 2c seconds max. ti me te mperature 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
|
