119 ? 2009 littelfuse, inc. specications are subject to change without notice. surface mount fuses 203 series flat-pak ? slo-blo ? fuse > 203 series please refer to www.littelfuse.com/series/203.html for current information. 203 series 203 series fuse description fast-acting and slo-blo ? fuse versions of the flat-pak fuse designs are available. both designs are available in either a gull-wing surface mount package or a dip conguration for through-hole mounting. these fuse designs feature a 250 vac rating in a low prole, rectangular package. agency approvals agency agency file number ampere range e10480 1/4ma - 5a lr29862 1/4ma - 5a electrical characteristics for series % of ampere rating opening time 100% 4 hours, minimum 200% 1 second, min; 30 seconds max. electrical specications by item 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 0.25 .250 250 50 amperes @250 vac 1.36 0.0126 x x 0.50 .500 250 0.433 0.112 x x 0.75 .750 250 0.158 0.327 x x 1.00 001. 250 0.0755 0.328 x x 1.50 01.5 250 0.0390 0.850 x x 2.00 002. 250 0.0345 1.70 x x 2.50 02.5 250 0.0237 2.87 x x 3.00 003. 250 0.0197 4.40 x x 4.00 004. 250 0.0148 8.75 x x 5.00 005. 250 0.0124 14.7 x x revised: june 29, 2011
introduction to circuit protection introduction to circuit protection transientology 120 ? 2009 littelfuse, inc. specications are subject to change without notice. surface mount fuses 203 series flat-pak ? slo-blo ? fuse > 203 series please refer to www.littelfuse.com/series/203.html for current information. average time current curves 100 10 1 0.01 0.001 1000 100 10 1 0.1 0.0 5 1/4a 1/2a 3/4a 1a 1 1/2a 2 a 2 1/2a 3a 4a 5 a time in seconds current in amperes .1 soldering parameters temperature rerating curve note: 1. derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. wave soldering 260c, 3 seconds max. reow soldering 215c, 30 seconds max.
121 ? 2009 littelfuse, inc. specications are subject to change without notice. surface mount fuses 203 series flat-pak ? slo-blo ? fuse > 203 series please refer to www.littelfuse.com/series/203.html for current information. 203 series materials body: thermoplastic terminations: tin/lead plated copper solderability mil-std-202, method 208 product characteristics cleaning board washable in most common solvents operating temperature C55 o c to 125 o c 9.45 (.372") 6.35 (.250") 4.19 (.165") 0.53 (.021") 10.16 (.400") .135" 0.30 (.012") 6 o 202 flat- pak l f f 2a 250 v pat 4563666 dip configuration (thru-hole) mounting 9.45 (.372") 6.35 (.250") 4.19 (.165") 202g flat- pak l f f 2a 250 v pat 4563666 smf configuration ("gull wing" surface mount) 1.52 (.060") 0.08 (.003") 1.40 (.055") 15.24 (.600") 17.12 (.674) 4.06 (.160) 11.53 (.454) 2.79 (.110) recommended pad layout dimensions part numbering system 0203 002. hxg series amp code refer to amp code column of electrical characteristics table quantity code hxg = 100 urg = 500 0203 002. h series amp code refer to amp code column of electrical characteristics table quantity code h = 100 surface mount fuses: through hole fuses: packaging packaging option packaging specication quantity quantity & packaging code surface mount fuses bulk C 100 hxg 24mm tape and reel eia 481 (iec60286, part 3) 500 urg through hole fuses antistatic magazine C 100 h
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