29 ? 2009 littelfuse, inc. specifcations are subject to change without notice. surface mount fuses thin film > 1206 size > very fast-acting > 466 series 466 series 466 series please refer to www.littelfuse.com/series/466.html for current information. 466 series fuse description the 466 series fast-acting surface mount fuse (smf) is a small (1206 size) thin-flm device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. this series is 100% lead-free and meets the requirements of the rohs directive. new halogen-free 466 series fuses are available to order using the hf suffx. see part numbering section for additional information. agency approvals agency agency file number ampere range e 10480 125ma - 5a lr29862 125ma - 5a features electrical characteristics for series ? product is compatible with lead-free solders and higher temperature profles ? product is marked on top surface with code to allow amperage rating identifcation without testing ? low profle for height sensitive applications ? flat top surface for pick- and-place operations ? element-covering material is resistant to industry standard cleaning operations ? mounting pad and electrical performance are identical to littelfuse 429 and 433 series products ? alloy-based element construction provides superior inrush withstand characteristics (i 2 t) over ceramic or glass-based 1206 chip fuse products % of ampere r ating opening time at 25 o c 100% 4 hours, minimum 200% 5 sec., maximum 300% 0.2 sec., maximum applications ampere r ating (a) amp code max voltage r ating (v) i nterrupting r ating nominal cold r esistance (ohms) nominal melting i 2 t (a 2 sec) nom voltage drop (mv) nom p ower dissipation (w) agency approvals 0.125 .125 125 50a @125 v ac/ dc 4.000 0.00040 552.66 0.0691 x x 0.200 .200 125 1.160 0.00055 254.28 0.0509 x x 0.250 .250 125 0.710 0.0010 207.01 0.0518 x x 0.375 .375 125 0.350 0.0028 169.18 0.0634 x x 0.500 .500 63 50a @63 v ac/dc 0.248 0.0060 158.47 0.0792 x x 0.750 .750 63 0.111 0.0276 98.65 0.0740 x x 1.00 0 01. 63 0.076 0.0423 89.94 0.0899 x x 1.25 1.25 63 0.059 0.0640 85.71 0.1071 x x 1.50 01.5 63 0.048 0.1103 82.97 0.1244 x x 1.75 1.75 63 0.039 0.1323 80.73 0.1413 x x 2.00 002. 63 0.031 0.2326 78.73 0.1575 x x 2.50 02.5 32 50a @32 v ac/dc 0.024 0.3516 76.99 0.1925 x x 3.00 003. 32 0.020 0.5760 75.99 0.2280 x x 4.00 004. 32 0.014 1.024 74.50 0.2980 x x 5.00 005. 32 0.011 1.600 73.75 0.3688 x x electrical specifcations by item 1. measured at 10% of rated current, 25oc. 2. measured at rated voltage. ? cell phones ? battery packs ? digital cameras ? dvd players ? hard disk drives secondary protection for space constrained applications: revised: jun 16, 2011
introduction to circuit protection introduction to circuit protection transientology 30 ? 2009 littelfuse, inc. specifcations are subject to change without notice. surface mount fuses thin film > 1206 size > very fast-acting > 466 series 466 series please refer to www.littelfuse.com/series/466.html for current information. average time current curves time in seconds current in amperes 0.01 0.1 0.1 1 1 10 100 10 100 0.001 4a 3a 2 1/2 a 2a 1 3/4 a 1 1/2 a 1 1/4 a 1a 3/4a 1/2a 3/8a 1/4a 1/8a 5a r efow condition p free assemly p re heat - temperature min (t s(min) ) 150c - temperature max (t s(max) ) 200c - time ( min to max) (t s ) 60 180 seconds average r amp-up r ate (l iquidus temp (t l ) to peak) 5csecond max t s(max) to t l - r amp-up r ate 5csecond max r efow - temperature (t l ) (liquidus) 21c - temperature (t l ) 60 150 seconds p eak temperature (t p ) 250 0-5 c time within 5 c of actual peak temperature (t p ) 20 40 seconds r amp-down r ate 5csecond max time 25 c to peak temperature (t p ) 8 minutes max do not exceed 260c soldering parameters temperature rerating curve wave soldering 260c 10 seconds max note 1 rerating depicted in this curve is in addition to the standard rerating of 25% for continuous operation example: about temperature derating curve, please consult littelfuse technical support for 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
31 ? 2009 littelfuse, inc. specifcations are subject to change without notice. surface mount fuses thin film > 1206 size > very fast-acting > 466 series 466 series 466 series please refer to www.littelfuse.com/series/466.html for current information. dimensions 2.03 (.080") 2.03 (.080") wave solder reflow solder 3.81 (. 1 50") 1.52 (.060") 0.584 0.076 (0.023" 0.003") 0.559 0.127 (0.022" 0.005") 0.660 0.127 (0.026" 0.005") 1.14 (.045") marking code varies with amperage rating (see chart) 3.175 0.127 (0.125" 0.005") 3.175 0.127 (0.125" 0.005") 4.83 (. 1 90") 1 .65 (.065") 1 .52 (.060") sn sn sn cu coating 1.524 0.127 (0.060" 0.005") packaging part numbering system materials body: advanced high temperature substrate terminations: 100% tin over nickel over element cover coat: conformal coating operating temperature 55 o c to 90 thermal shock ithstands 5 cycles of 55 o c to 125 o c humidity mil-std-202f, method 103b, condition d product characteristics vibration per mil-std-202f, method 201a insulation resistance (after opening) greater than 10000 ohms resistance to soldering heat mil-std-202g, method 210f, part marking system p ackaging option p ackaging specifcation quantity quantity & p ackaging code 8mm tape and reel eia-481 rev. d (iec 60286, part 3) amp code marking code 125 b .200 c .250 d .35 e .500 f .50 g 001. h 1.25 j 01.5 k 1.5 l 002. n 02.5 o 003. p 004. s 005. t 0466002.nrhf series amp code hf suffix halogen free item q uantit y code refer to amp code column in the electrical specifcations table. the dot is poisitioned before the pack packaging code r tape and reel example: .125 amp product is 0466.125 nr hf (2 amp product shon above).
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