25 ? 2009 littelfuse, inc. specifications are subject to change without notice. surface mount fuses 501 series ceramic fuse > 501 series please refer to www.littelfuse.com/series/501.html for current information. 501 series 501 series C high current 1206 fast-acting fuse description the 501 series is a 100% lead-free, rohs compliant and halogen-free fuse series designed specifically to provide over- current protection to circuits that operate under high working ambient temperature up to 150c. the general design ensures excellent temperature stability and performance reliability. the high i 2 t values which is typical in the littelfuse ceramic fuse family, ensure high inrush current withstand capability. agency approvals agency agency file number ampere range e10480 10a - 20a lr29862 10a - 20a features 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 t j h o f e u p q s p w j e f over-current protection in high current voltage regulator module (vrm) applications t - f b e g s f f
3 p ) 4 compliant and halogen- free 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 reflow / wave soldering electrical characteristics for series % of ampere rating ampere rating opening time at 25oc 100% 10a C 20a 4 hours, minimum 350% 10a C 20a 5 seconds, maximum applications t 7 p m u b h f 3 f h v m b u p s module (vrm) equipment t / p u f c p p l 1 $ t % $ % $ $ p o w f s u f s ampere rating (a) amp code max. voltage rating (v) interrupting rating (dc) 1 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 10 010. 32 " ! 7 % $ 0.00427 10.385 0.05679 0.5679 x x 12 012. 32 0.00321 20.341 0.04891 0.5870 x x 15 015. 32 0.00250 36.100 0.04605 0.6908 x x 20 020. 32 0.00200 54.760 0.05936 1.1871 x x electrical specifications by item / p u f t % $ * o u f s s v q u j o h 3 b u j o h u f t u f e b u s b u f e w p m u b h f x j u i u j n f d p o t u b o u n t f d / p n j o b m 3 f t j t u b o d f n f b t v s f e x j u i s b u f e d v s s f o u / p n j o b m . f m u j o h * 2 t measured at 1 msec. opening time. for other i 2 t data refer to chart. / p n j o b m 7 p m u b h f % s p q n f b t v s f e b u s b u f e d v s s f o u b g u f s u f n q f s b u v s f i b t t u b c j m j [ f e b o e x j u i g v t f n p v o u f e p o c p b s e x j u i p [ $ v u s b d f % f w j d f t e f t j h o f e u p d b s s z s b u f e d v s s f o u g p s i p v s t n j o j n v n * u j t s f d p n n f o e f e u i b u devices be operated continuously at no more than 80% rated current. see temperature rerating curvefor additional rerating information. % f w j d f t e f t j h o f e u p c f n p v o u f e x j u i n b s l j o h d p e f g b d j o h v q revised: august 04, 2011
introduction to circuit protection introduction to circuit protection transientology 26 ? 2009 littelfuse, inc. specifications are subject to change without notice. surface mount fuses 501 series ceramic fuse > 501 series please refer to www.littelfuse.com/series/501.html for current information. average time current curves 0.001 0.01 0.1 1 10 1 10 100 1000 time in seconds current in amperes 15a 10a 12a 20a reflow 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 ) 60 C 180 seconds 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. reflow - temperature (t l ) (liquidus) 217c - temperature (t l ) 60 C 150 seconds peak temperature (t p ) 260 +0/-5 c time within 5c of actual peak temperature (t p ) 10 C 30 seconds 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 wave soldering 260c, 10 seconds max. & y b n q m f ' p s d p o u j o v p v t p q f s b u j p o b u e f h s f f t d f m t j v t
u i f g v t f t i p v m e c f s f s b u f e b t g p m m p x t i = (0.80)(0.85)i rat = (0.68)i rat / p u f 1. rerating depicted in this curve is in addition to the standard rerating of 20% for continuous operation. 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
27 ? 2009 littelfuse, inc. specifications are subject to change without notice. surface mount fuses 501 series ceramic fuse > 501 series please refer to www.littelfuse.com/series/501.html for current information. 501 series materials body: advanced ceramic terminations: " h / j 4 o - f b e g s f f
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 test . * - 4 5 %
. f u i p e #
$ p o e j u j p o t % resistance to solvents . * - 4 5 %
. f u i p e '
$ p o e j u j p o # product characteristics moisture resistance . * - 4 5 %
. f u i p e ( thermal shock . * - 4 5 %
. f u i p e (
$ p o e j u j p o # mechanical shock . * - 4 5 %
. f u i p e #
condition a vibration . * - 4 5 %
. f u i p e " vibration, high frequency . * - 4 5 %
. f u i p e %
$ p o e j u j p o % dissolution of metallization * 1 $ & $ " + & % & $ + 4 5 % $
$ p o e j u j p o % terminal strength iec 60127-4 dimensions packaging part marking system packaging option packaging specification quantity quantity & packaging code 8mm tape and reel & * "
* & $
1 b s u 3000 wr part numbering system 20 1.00 [.04] 1.63 +.10/-.20 [.064 +.004/-.008] 3.200 .1778 [.126 .007] 0.835 0.15 [.033 .006] termination thin version .520 .200 [.020 .008] .502 .08 [.02 .003] 1.500 [.059] 1.800 [.071] 3.500 [.138] 1.000 [.039] amp code marking code 010. 10 012. 12 015. 15 020. 20 0501 020. w r s series amp code w = 3000 pcs quantity r = reel pack packing code s = thin version thickness code
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