? 2013 littelfuse, inc. specifcations are subject to change without notice. revised: may 2, 2013 12:03 pm 448 series fuse description the lead-free nano 2 smf fuse is a very small, square surface mount fuse that is rohs compliant, halogen free and 100% lead-free. this product is fully compatible with lead-free solder alloys and higher temperature profles associated with lead-free assembly. agency approvals features ps e electrical characteristics for series % of ampere rating ampere rating opening time 100% 1/16 C15 4 hours, minimum 200% 1/16 C10 5 sec., maximum 12 C15 20 sec., maximum applications ? notebook pc ? lcd/pdp tv ? lcd monitor ? lcd/pdp panel ? lcd backlight inverter ? portable dvd player ? power supply ? networking ? pc server ? cooling fan system ? storage system ? telecom system ? wireless basestation ? white goods ? game console ? offce automation equipment ? battery charging circuit protection ? industrial equipment ? medical equipment ? automotive ? lead-free and halogen free ? very fast acting ? small size ? wide range of current rating available (62ma to 15a) ? wide operating temperature range ? low temperature de-rating agency agency file number ampere range e 10480 62ma - 15a lr29862 62ma - 15a ps e nbk030205 1a - 10a surface mount fuses nano 2? > very fast-acting > 448 series
? 2013 littelfuse, inc. specifcations are subject to change without notice. revised: may 2, 2013 12:03 pm ampere rating (a) amp code max voltage rating (v) i nterrupting rating nominal cold resistance (ohms) nominal melting i 2 t (a 2 sec) agency approvals ps e 0.062 .062 125 50 amperes @125 vac/vdc 300 amperes @32 vdc pse: 100 amperes @100vac 5.50 0.00023 x x 0.080 .080 125 4.42 0.00043 x x 0.100 .100 125 2.90 0.00082 x x 0.125 .125 125 2.58 0.00130 x x 0.160 .160 125 1. 76 0.00280 x x 0.200 .200 125 1.40 0.00380 x x 0.250 .250 125 1.05 0.01520 x x 0.315 .315 125 0.7900 0.02650 x x 0.375 .375 125 0.7300 0.02400 x x 0.400 .400 125 0.4895 0.04160 x x 0.500 .500 125 0.3800 0.10000 x x 0.630 .630 125 0.2821 0.121 x x 0.750 .750 125 0.2475 0.206 x x 0.800 .800 125 0.1907 0.272 x x 1. 0 0 0 01. 125 0.08630 0.441 x x x 1.25 1.25 125 0.06619 0.900 x x x 1.50 01. 5 125 0.06514 0.900 x x x 1.60 01. 6 125 0.06261 1.122 x x x 2.00 002. 125 0.03529 0.812 x x x 2.50 02.5 125 0.02934 1.156 x x x 3.00 003. 125 0.02445 1.720 x x x 3.15 3.15 125 0.02300 1.810 x x x 3.50 03.5 125 0.02100 2.300 x x x 4.00 004. 125 0.01577 3.970 x x x 5.00 005. 125 0.01531 4.490 x x x 6.30 06.3 125 0.01044 12.10 x x x 7. 0 0 0 0 7. 125 0.00900 13.92 x x x 8.00 008. 125 0.00780 18.33 x x x 10.00 010. 125 35 amperes @125 vac 50 amperes @125 vdc 300 amperes @32 vdc pse: 100 amperes @100vac 0.00700 28.00 x x x 12.00 012. 85 50 amperes @65 vac/vdc 300 amperes @24 vdc 200 amperes @85 vdc 0.00533 47.59 x x 15.00 015. 85 0.00394 96.10 x x electrical specifcations by item notes: - l 2 t calculated at 8ms. - resistance is measured at 10% of rated current, 25oc surface mount fuses nano 2? > very fast-acting > 448 series
? 2013 littelfuse, inc. specifcations are subject to change without notice. revised: may 2, 2013 12:03 pm average time current curves refow condition pb C free assembly p re heat - temperature min (t s(min) ) 150c - temperature max (t s(max) ) 200c - time ( min to max) (t s ) 60 C 120 secs average ramp up rate ( l iquidus temp (t l ) to peak 5c/second max. t s(max) to t l - ramp-up rate 5c/second max. refow - temperature (t l ) (liquidus) 217c - temperature (t l ) 60 C 90 seconds p eak temperature (t p ) 260 +0/C5 c time within 5 c of actual peak temperature (t p ) 20 C 40 seconds ramp-down rate 5c/second max. time 25 c to peak temperature (t p ) 8 minutes max. do not exceed 260c wave soldering p arameters 260c peak temperature, 10 seconds max. soldering parameters temperature rerating curve 448 series nano lead free very fast acting fuse 0.001 0.01 0.1 1 10 100 0 0 0 1 0 0 1 0 1 1 1 . 0 current in amps time in seconds .062 a .080 a .100 a .125 a .160 a .200 a .250 a .315 a .375 a .40 a .50 a .63 a .75 a .80 a 1.00 a 1.25 a 1.50 a 1.60 a 2.00 a 2.50 a 3.00 a 3.15 a 3.50 a 4.00 a 5.00 a 6.30 a 7 a 8 a 10 a 12 a 15 a note: 1. derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 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 surface mount fuses nano 2? > very fast-acting > 448 series
? 2013 littelfuse, inc. specifcations are subject to change without notice. revised: may 2, 2013 12:03 pm materials body: ceramic terminations: gold-plated caps product marking brand, amperage rating operating temperature -55 o c to 125 o c moisture sensitivity level level 1, j-std-020c solderability mil-std-202, method 208 insulation resistance (after opening) mil-std-202, method 302, test condition a (10,000 ohms minimum) thermal shock mil-std-202, method 107, test condition b, 5 cycles, -65 o c to 125 o c, 15 minutes @ each extreme mechanical shock mil-std-202, method 213, test i: deenergized. 100gs pk amplitude, sawtooth wave 6ms duration, 3 cycles xyz+xyz = 18 shocks vibration mil-std-202, method 201: 0.03 amplitude, 10-55 hz in 1 min. 2hrs each xyz=6hrs moisture resistance mil-std-202, method 106, 10 cycles salt spray mil-std-202, method 101, test condition b (48hrs) resistance to soldering heat mil-std-202, method 210, test condition b (10 sec at 260 o c) product characteristics f 7 a 6.86 (.270") 3.15 (.124") 2.95 (.116") 1.96 (.077") 2.69 .25 (.106") 2.69 .25 (.106") 1.45 (.057") 6.10 .20 (.240") recommended pad layout dimensions packaging part numbering system p ackaging option p ackaging specifcation quantity quantity & p ackaging code 12mm tape and reel eia rs-481-1 (iec 286, part 3) 1000 mr 0448 001. m r series amp code * qu antit y code pac ka ging code refer to electrical characteristics table m = 1000 pcs r = tape and reel *example: 1.5 amp product is 0448 01. 5 mr (1 amp product shown above). surface mount fuses nano 2? > very fast-acting > 448 series
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