? 2017 littelfuse, inc. specifcations are subject to change without notice. revised: 10/12/17 438gt series C 0603 fast-acting fuse description the 438gt series is a 100% lead-free, rohs compliant and halogen-free fuse series designed specifcally to provide over-current protection to circuits that operate under high working ambient temperature up to 150oc. the general design ensures excellent temperature stability and performance reliability. the high i2t 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 2a C 6a 29862 2a C 6a features electrical characteristics for series ? operating temperature from -55oc to +150oc ? 100% lead-free, rohs compliant and halogen-free ? suitable for both leaded and lead-free refow/ wave soldering % of ampere rating ampere rating opening time at 25oc 100% 2a C 6a 4 hours, minimum 250% 2a C 6a 5 seconds, maximum applications ampere rating (a) amp code max. voltage rating (v) interrupting rating (ac/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 2 002. 32 50a @ 32vdc/12vac 0.0490 0.181 0.110 0.220 x x 2.5 02.5 32 0.0364 0.240 0.094 0.235 x x 3 003. 32 0.0264 0.439 0.082 0.246 x x 3.5 03.5 32 0.0210 0.647 0.078 0.273 x x 4 004. 32 0.0164 0.739 0.075 0.300 x x 5 005. 32 0.0127 0.747 0.072 0.360 x x 6 006. 24 50a @ 24vdc/12vac 0.0086 1.444 0.070 0.420 x x electrical specifcations by item notes: 1. ac interrupting rating tested at rated voltage with unity power factor. dc interrupting rating tested at rated voltage with time constant <0.8 msec. 2. nominal resistance measured with <10% rated current. 3. nominal melting i2t measured at 1msec. opening time. 4. nominal voltage drop measured at rated current after temperature has stabilized. rohs pb ? handheld electronics ? lcd displays ? battery packs ? hard disk drives ? sd memory cards devices designed to carry rated current for 4 hours minimum. it is recommended that devices be operated continuously at no more than 80% rated current. see temperature re-rating curvefor additional re-rating information. devices designed to be mounted with marking code facing up. specifcations are subject to change without notice. application testing is strongly recommended. additional information ataseet samples resources surface mount fuses ceramic fuse > 438gt series
? 2017 littelfuse, inc. specifcations are subject to change without notice. revised: 10/12/17 average time current curves refow condition pb C free assembly 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. refow - 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 re-rating curve 40 60 80 10 0 12 0 14 0 -6 5 -45 -25 -5 15 35 55 75 95 115 135 15 5 m f example: 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. re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation. wave soldering 260c, 10 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 0.001 0.01 0. 1 1 10 100 0. 11 10 10 0 ti me in se co nd s cu rrent in am pe re s 3 4 3 surface mount fuses ceramic fuse > 438gt series
? 2017 littelfuse, inc. specifcations are subject to change without notice. revised: 10/12/17 materials body: advanced ceramic terminations: ag / ni / sn (100% lead-free) element cover coating: lead-free glass moisture sensitivity level ipc/jedec j-std-020, level 1 solderability ipc/eic/jedec j-std-002, condition b humidity mil-std-202, method 103, conditions d resistance to solder heat mil-std-202, method 210, condition b product characteristics moisture resistance mil-std-202, method 106 thermal shock mil-std-202, method 107, condition b-3 mechanical shock mil-std-202, method 213, condition a vibration mil-std-202, method 201 vibration, high frequency mil-std-202, method 204, condition d dissolution of metallization ipc/eic/jedec j-std-002, condition d terminal strength iec 60127-4 dimensions 1 .582 0.1 52 [0.062 0.0 06] 0.74 [0.029] 1. 00 [0.039] 1 .94 [0.076 ] 0.60 [0.024] 0.508 0.1 02 [0.02 0.00 4] 0.83 0.1 52 [0.032 0.0 06] 0.432 +/- 0.1 50 [0.0 17 +/- 0.0 06] packaging part marking system packaging option packaging specifcation quantity quantity & packaging code 8mm tape and reel eia-481, iec 60286, part 3 3000 wr part numbering system 0438 005. w r gt series amp code quantity code packing code w = 3000 pcs r = reel pack amp code marking code 002. n 02.5 o 003. p 03.5 r 004. s 005. t 006. u disclaimer notice - information furnished is believed to be accurate and reliable. however, users should independently eval- uate the suitability of and test each product selected for their own applications.?littelfuse products are not designed for, and may not be used in, all applications.?read complete disclaimer notice at www.littelfuse.com/disclaimer-electronics . surface mount fuses ceramic fuse > 438gt series
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