1 ? 2009 littelfuse, inc. specications are subject to change without notice. surface mount fuses 441 series ceramic fuse > 441 series please refer to www.littelfuse.com/series/441.html for current information. 441 series 441 series C 0603 high i 2 t fuse description this 100% lead-free, rohs compliant and halogen-free fuse series has been designed specically to provide over current protection to circuits that see high working ambient temperatures (up to 150oc) and high inrush currents. the general design ensures excellent temperature stability and performance reliability. this high i2t fuse series is designed to have ultra high inrush current withstand capability to avoid nuisance fuse open. agency approvals agency agency file number ampere range e10480 2a - 6a lr29862 2a - 6a features electrical characteristics t 0 q f s b u j o h 5 f n q f s b u v s f from -55oc to 150oc t - f b e g s f f b o e rohs compliant t 4 v j u b c m f g p s c p u i m f b e f e and lead-free reow / wave soldering t 6 m u s b i j h i * u w b m v f t % of ampere rating ampere rating opening time at 25oc 100% 2a - 6a 4 hours minimum 350% 2a - 6a 5 seconds maximum applications electrical specications by item notes: 1. dc interrupting rating tested at rated voltage with time constant < 0.8 msecs. 2. nominal resistance measured with < 10% rated current. 3. nominal melting i2t measured at 1 msec. opening time. 4. nominal voltage drop measured at rated current after temperature has stabilized. t ) b o e i f m e & m f d u s p o j d t t - $ % % j t q m b z t t # b u u f s z 1 b d l t t ) b s e % j t l % s j w f t t 4 % . f n p s z $ b s e t t " v u p n p u j w f & m f d u s p o j d t devices designed to carry out rated current for 4 hours minimum. it is recommended that devices be operated continuously at no more than 80% rated current. see temperature rerating curvefor additional rerating information. devices designed to be mounted with marking code facing up. ampere rating (a) amp code max. voltage rating (v) interrupting rating nominal resistance (ohms) 2 nominal melting i 2 t (a 2 sec.) 3 nominal voltage drop at rated current (v) 4 nominal power dissipation at rated current (w) agency approvals 2 002. 32 50 a @ 32 vdc 0.0302 0.3103 0.0551 0.110 x x 2.5 02.5 32 0.0200 0.5520 0.0534 0.134 x x 3 003. 32 0.0158 0.8165 0.0531 0.159 x x 3.5 03.5 32 0.0117 0.9438 0.0468 0.164 x x 4 004. 32 0.0097 1.2659 0.0475 0.190 x x 5 005. 32 0.0073 1.6287 0.0472 0.236 x x 6 006. 32 0.0056 2.6049 0.0464 0.278 x x revised: june 15, 2010
introduction to circuit protection introduction to circuit protection transientology 2 ? 2009 littelfuse, inc. specications are subject to change without notice. surface mount fuses 441 series ceramic fuse > 441 series please refer to www.littelfuse.com/series/441.html for current information. average time current curves 0.001 0.01 0.1 1 10 100 1 10 100 2.5a 3.5a 2a 3a 4a 5a 6a time in seconds current in amperes reow condition 1 c o g s f f b t t f n c m z pre heat - temperature min (t s(min) ) 150c - temperature max (t s(max) ) 200c - time (min to max) (t s ) o t f d p o e t average ramp-up rate (liquidus temp (t l ) to peak) 3c/second max. t s(max) to t l - ramp-up rate 5c/second max. reow - temperature (t l ) (liquidus) 217c - temperature (t l ) o t f d p o e t peak temperature (t p ) 260 +0/-5 c time within 5c of actual peak temperature (t p ) o t f d p o e t ramp-down rate 6c/second max. time 25c to peak temperature (t p ) 8 minutes max. do not exceed 260c soldering parameters temperature rerating curve 40 60 80 100 120 140 -6 5 -4 5 -2 5 - 5 1 5 3 5 55 7 5 9 5 11 5 13 5 1 55 temperature (c) percent of rating for continuous operation at 75 degrees celsius, the fuse should be rerated as follows: i = (0.80)(0.85)i rat = (0.68)i rat note: 1. rerating depicted in this curve is in addition to the standard rerating of 20% for continuous operation. 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
3 ? 2009 littelfuse, inc. specications are subject to change without notice. surface mount fuses 441 series ceramic fuse > 441 series please refer to www.littelfuse.com/series/441.html for current information. 441 series materials body: advanced ceramic terminations: ag / ni / sn (100% lead-free) element cover coating: lead-free glass moisture sensitivity level * 1 $ + & % & $ + 4 5 % $
- f w f m solderability * 1 $ & $ " + & % & $ + 4 5 % $
$ p o e j u j p o $ humidity . * - 4 5 %
. f u i p e #
$ p o e j u j p o t % esd immunity * & $
l 7 % j s f d u resistance to solder heat . * - 4 5 %
. f u i p e '
$ p o e j u j p o # product characteristics moisture resistance mil-std-202, method 106g thermal shock mil-std-202, method 107g, $ p o e j u j p o # mechanical shock . * - 4 5 %
. f u i p e #
condition a vibration mil-std-202, method 201a vibration, high frequency mil-std-202, method 204d, condition d dissolution of metallization * 1 $ & $ " + & % & $ + 4 5 % $
condition d terminal strength * & $ dimensions 1.54 +/- 0.150 [0.061 +/- 0.006] 0.74 [0.029] 1.00 [0.039] 1.94 [0.076] 0.60 [0.024] 0.502 +/- 0.080 [0.020 +/- 0.003] 0.530 +/- 0.150 [0.021 +/- 0.006] 0.850 +/- 0.150 [0.033 +/- 0.006] 0.432 +/- 0.150 [0.017 +/- 0.006] packaging part marking system packaging option packaging specication quantity quantity & packaging code 8mm tape and reel & * " * & $
q b s u
3000 wr part numbering system 0441 005. w r series amp code quantity code packing code w = 3000 pcs 3 3 f f m 1 b d l amp code marking code 002. n 02.5 o 003. p 03.5 r 004. s 005. t 006. u
introduction to circuit protection introduction to circuit protection transientology 4 ? 2009 littelfuse, inc. specications are subject to change without notice.
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