7 revision: february 13, 2008 surface mount fuses ?2008 littelfuse, inc. speci?cations are subject to change without notice. please refer to www.littelfuse.com for the most current information thin film > 1206 size > very fast acting > 433 series 433 series 433 series fuse description the 433 series fast-acting surface mount fuse series is a small (1206 size) thin-?lm device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. for rohs compliant and lead-free design, please refer to the littelfuse 466 series thin ?lm fuse. for new designs of 7 amp please refer to littelfuse 429 series thin ?lm fuse. agency approvals ? ? agency agency file number ampere range ? e10480 125ma - 5a ? lr29862 125ma - 5a features electrical characteristics for series t 5 i f 4 m j n - j o f fuse is an extremely small, low pro?le design (1206 chip size) utilizing thin-?lm technology to achieve precise control of electrical characteristics. t 5 i f m p x f s i f j h i u q s p m m f produces a ?at surface for improved performance in pick-and-place operations and an alternate solution for height critical application. t . p v o u j o h q b e b o e electrical speci?cation are identical to the popular 429 series speci?cations. % of ampere rating opening time at 25 o c 100% 4 hours, minimum 200% 5 sec., maximum 300% 0.2 sec., maximum applications 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 ? ? 0.125 .125 125 50a @125 v ac/dc 3.45000 0.00040 x x 0.200 .200 125 0.93800 0.00055 x x 0.250 .250 125 0.62500 0.00100 x x 0.375 .375 125 0.37500 0.00280 x x 0.50 .500 63 50a @63 v ac/dc 0.24050 0.00600 x x 0.60 .600 63 0.21000 0.01310 x x 0.75 .750 63 0.13700 0.01700 x x 0.80 .800 63 0.12250 0.03050 x x 1.00 001. 63 0.09950 0.03500 x x 1.25 1.25 63 0.07475 0.06500 x x 1.50 01.5 63 0.06250 0.12500 x x 1.75 1.75 63 0.05000 0.15000 x x 2.00 02.0 63 0.03975 0.23000 x x 2.50 02.5 32 50a @32 v ac/dc 0.03065 0.5 0000 x x 3.00 03.0 32 0.02625 0.7 0000 x x 4.00 04.0 24 50a @24 v ac/dc 0.01400 1.0240 x x 5.00 05.0 24 0.01100 1.6000 x x electrical speci?cations by item 1. measured at 10% of rated current, 25oc. 2. measured at rated voltage. t $ f m m q i p o f t t # b u u f s z q b d l t t % j h j u b m d b n f s b t t % 7 % q m b z f s t t ) b s e e j t l e s j w f t secondary protection for space constrained applications such as:
8 revision: february 13, 2008 surface mount fuses ?2008 littelfuse, inc. speci?cations are subject to change without notice. please refer to www.littelfuse.com for the most current information thin film > 1206 size > very fast acting > 433 series 433 series average time current curves time in seconds current in amperes 0.01 0.1 0.1 1 1 10 100 10 10 0 0.001 3a 2.5a 2a 1.75a 1.5a 1.25a 1a .8a .75a .6a .5a .375a .25a .200a .125a 4a 5a temperature rerating curve re?ow 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 secs average ramp up rate (liquidus temp (t l ) to peak 5c/second max t s(max) to t l - ramp-up rate 5c/second max re?ow - temperature (t l ) (liquidus) 217c - temperature (t l ) 60 C 150 seconds peak temperature (t p ) 250 +0/-5 c time within 5c of actual peak temperature (t p ) 20 C 40 seconds ramp-down rate 5c/second max time 25c to peak temperature (t p ) 8 minutes max. do not exceed 260c soldering parameters - wave soldering
9 revision: february 13, 2008 surface mount fuses ?2008 littelfuse, inc. speci?cations are subject to change without notice. please refer to www.littelfuse.com for the most current information thin film > 1206 size > very fast acting > 433 series 433 series dimensions 2.03 (.080") 2.03 (.080") wave solder reflow solder 3.81 (.150") 1.27 (.050") .58 (.023") .56 (.022") .66 (.026") 1.14 (.045") marking code varies with amperage rating (see chart) 1.52 (.060") 3.18 (.125") 3.18 (.125") 4.83 (.190") 1.65 (.065") 1.52 (.060") sn/pb sn/pb sn/pb cu coating packaging part numbering system 0433 .125 nr amp code series quantity code materials body: epoxy substrate terminations: 95% tin / 5% lead over nickel over copper element cover coat: conformal coating operating temperature C 55 o c to 90 o c. consult temperature rerating curve chart. thermal shock withstands 5 cycles of C 55 o c to 125 o c humidity mil-std-202f method 103b condition d vibration per mil-std-202f, method 201a insulation resistance (after opening) greater than 10,000 ohms. resistance to soldering heat withstands 60 seconds above 200 o c and up to 260 o c, maximum product characteristics part marking system packaging option packaging speci?cation quantity quantity & packaging code tape & reel C 8mm tape eia rs-481-1 (iec 286, part 3) 5000 nr amp code marking code .125 b .200 c .250 d .375 e .500 f .600 .6 .750 g .800 .8 001. h 1.25 j 01.5 k 1.75 l 002. n 02.5 o 003. p 03.5 r 004. s 005. t
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