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? 2012 littelfuse, inc. speci?cations are subject to change without notice. surface mount fuses 448 series nano 2? > very fast-acting > 448 series please refer to www.littelfuse.com/series/448.html for current information. 448 series 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 pro?les 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 20 0% 1/16 C10 5 sec., maximum 12 C15 20 sec., maximum applications t /pufcppl1$ t -$%1%157 t -$%npojups t -$%1%1qbofm t -$%cbdlmjhiujowfsufs t 1psubcmf%7%qmbzfs t 1pxfstvqqmz t /fuxpsljoh t 1$tfswfs t $ppmjohgbotztufn t 4upsbhftztufn t 5fmfdpntztufn t 8jsfmfttcbtftubujpo t 8ijufhppet t (bnfdpotpmf t 0gmdf"vupnbujpo equipment t #buufszdibshjohdjsdvju protection t *oevtusjbmfrvjqnfou t .fejdbmfrvjqnfou t"vupnpujwf t -fbegsffboe)bmphfo free t 7fszgbtubdujoh t 4nbmmtj[f t 8jefsbohfpgdvssfou sbujohbwbjmbcmf n" up"
t 8jefpqfsbujoh temperature range t -pxufnqfsbuvsf de-rating agency agency file number ampere range e10480 62ma - 15a lr29862 62ma - 15a ps e nbk030205 1a - 10a revised: september 6, 2012
? 2012 littelfuse, inc. speci?cations are subject to change without notice. surface mount fuses 448 series nano 2? > very fast-acting > 448 series please refer to www.littelfuse.com/series/448.html for current information. ampere rating (a) amp code max voltage rating (v) interrupting rating nominal cold resistance (ohms) nominal melting i 2 t (a 2 sec) agency approvals ps e 0.062 .062 125 50 amperes !7"$7%$ 300 amperes !7%$ 14&bnqfsft !7"$ 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 0.1 0000 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 1.00 001. 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 7.00 007. 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 !7"$ 50 amperes !7%$ 300 amperes !7%$ 14&bnqfsft !7"$ 0.00700 28.00 x x x 12.00 012. 85 50 amperes !7"$7%$ 300 amperes !7%$ 200 amperes !7%$ 0.00533 47.59 x x 15.00 015. 85 0.00394 96.10 x x electrical speci?cations by item notes: - l 2 t calculated at 8ms. - resistance is measured at 10% of rated current, 25oc
? 2012 littelfuse, inc. speci?cations are subject to change without notice. surface mount fuses 448 series nano 2? > very fast-acting > 448 series please refer to www.littelfuse.com/series/448.html for current information. 448 series average time current curves re?ow condition 1co'sffbttfncmz pre heat - temperature min (t s(min) ) ?$ - temperature max (t s(max) ) ?$ - time (min to max) (t s ) 60 C 120 secs average ramp up rate (liquidus temp (t l ) to peak ?$tfdpoenby t s(max) to t l - ramp-up rate ?$tfdpoenby re?ow - temperature (t l ) (liquidus) ?$ - temperature (t l ) 60 C 90 seconds peak temperature (t p ) 250 +0/-5 ?$ time within 5c of actual peak temperature (t p ) 20 C 40 seconds ramp-down rate ?$tfdpoenby time 25c to peak temperature (t p ) 8 minutes max. do not exceed ?$ wave soldering parameters ?$1fbl temperature, 10 seconds max. soldering parameters temperature rerating curve 0.001 0.01 0.1 1 10 100 0001 001 01 1 1.0 current in amps time in seconds .062 a .080 a .100 a .125 a .160 a .200 a .250 a .315 a .375 a .40 a .50 a .63 a .75 a .80 a 1.00 a 1.25 a 1.50 a 1.60 a 2.00 a 2.50 a 3.00 a 3.15 a 3.50 a 4.00 a 5.00 a 6.30 a 7 a 8 a 10 a 12 a 15 a /puf %fsbujohefqjdufejouijtdvswfjtjobeejujpoupuiftuboebseefsbujohpggps continuous operation. time temperature t p l s(max) s(min) p l s imama (a) amn am pa iian l p
? 2012 littelfuse, inc. speci?cations are subject to change without notice. surface mount fuses 448 series nano 2? > very fast-acting > 448 series please refer to www.littelfuse.com/series/448.html for current information. materials #pez$fsbnjd 5fsnjobujpot(pmeqmbufe$bqt product marking #sboe "nqfsbhf3bujoh operating temperature -55 o $up o $ moisture sensitivity level -fwfm +45%$ solderability .*-45% .fuipe insulation resistance (after opening) .*-45% .fuipe 5ftu$poejujpo " pintnjojnvn
thermal shock .*-45% .fuipe 5ftu $poejujpo# dzdmft o $up 125 o $ njovuft!fbdifyusfnf mechanical shock .*-45% .fuipe 5ftu* %ffofshj[fe(tqlbnqmjuvef sawtooth wave 6ms duration, 3 dzdmft9:;yz[tipdlt vibration .*-45% .fuipew bnqmjuvef )[jonjoist fbdi9:;ist moisture resistance .*-45% .fuipe dzdmft salt spray .*-45% .fuipe 5ftu $poejujpo# ist
resistance to soldering heat .*-45% .fuipe 5ftu dpoejujpo# tfdbu o $
product characteristics f 7 a 6.86
3.15
2.95
1.96
2.69 .25
2.69 .25
1.45
6.10 .20
recommended pad layout dimensions packaging part numbering system packaging option packaging speci?cation quantity quantity & packaging code 12mm tape and reel &*"3 4 *&$ qbsu
1000 mr 0448 001. m r series amp code * quantity code packaging code refer to electrical characteristics table m = 1000 pcs r = tape and reel *example: 1.5 amp product is 044801.5mr bnqqspevdutipxobcpwf

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