surface mount fuses 57 ? 2009 littelfuse, inc. specifcations are subject to change without notice. 451/453 series nano 2? > very fast-acting > 451/453 series 451/453 series please refer to www.littelfuse.com/series/451.html or /453.html for current information. 451/453 series fuse description the nano 2 smf fuse is a very small, wire-in-air (wia) square shape surface mount fuse which is very suitable for the secondary side circuit over-current protection applications and is designed for pcb using surface mount technology. agency approvals agency agency file number ampere range e10480 6.3a - 15a lr29862 62ma - 15a ps e nbk030205-e10480b nbk101105-e184655 1a - 5a 6.3a - 10a e10480 62ma - 5a electrical characteristics for series features ? very fast acting ? small size ? wide range of current rating available (62ma to 15a) ? wide operating temperature range ? low temperature de-rating ? rohs compliant ? halogen free % of ampere rating ampere rating opening time 100% 1/16 C15 4 hours, minimum 200% 1/16 C10 5 sec., maximum 12 C15 20 sec., maximum ps e applications ? notebook pc ? lcd/pdp tv ? lcd monitor ? lcd/pdp panel ? lcd backlight inverter ? portable dvd player ? power supply ? networking ? pc server ? cooling fan system ? storage system ? telecom system ? wireless basestation ? white goods ? game console ? offce automation equipment ? battery charging circuit protection ? industrial equipment ? medical equipment ? automotive revised: january 10, 2012
introduction to circuit protection introduction to circuit protection transientology 58 ? 2009 littelfuse, inc. specifcations are subject to change without notice. surface mount fuses 451/453 series nano 2? > very fast-acting > 451/453 series please refer to www.littelfuse.com/series/451.html or /453.html for current information. electrical specifcations 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 ps e 0.062 .062 125 50 amperes @125vac/vdc 300 amperes @32vdc pse: 100 amperes @100vac 5.5000 0.00019 x x 0.080 .080 125 4.0500 0.00033 x x 0.100 .100 125 3.1000 0.00138 x x 0.125 .125 125 1.7000 0.00286 x x 0.160 .160 125 1.2157 0.0048 x x 0.200 .200 125 0.8372 0.0089 x x 0.250 .250 125 0.5765 0.0158 x x 0.315 .315 125 0.3918 0.0311 x x 0.375 .375 125 0.6100 0.0425 x x 0.400 .400 125 0.5600 0.0484 x x 0.500 .500 125 0.4200 0.0795 x x 0.630 .630 125 0.3050 0.143 x x 0.750 .750 125 0.2450 0.185 x x 0.800 .800 125 0.2120 0.271 x x 1.00 001. 125 0.1530 0.459 x x x 1.25 1.25 125 0.0780 0.664 x x x 1.50 01.5 125 0.0630 0.853 x x x 1.60 01.6 125 0.0580 1.060 x x x 2.00 002. 125 0.0367 0.530 x x x 2.50 02.5 125 0.0286 1.029 x x x 3.00 003. 125 0.0227 1.650 x x x 3.15 3.15 125 0.0215 1.920 x x x 3.50 03.5 125 0.0200 2.469 x x x 4.00 004. 125 0.0160 3.152 x x x 5.00 005. 125 0.0125 5.566 x x x 6.30 06.3 125 0.0096 9.170 x x x 7.00 007. 125 0.0090 10.32 x x x 8.00 008. 125 0.0077 20.23 x x x 10.0 010. 125 35 amperes @125 vac/ 50 amperes @125 vdc 300 amperes @32 vdc pse: 100 amperes @100vac 0.0056 26.46 x x x 12.0 012. 65 50 amperes @65 vac/vdc 300 amperes @24 vdc 0.0049 47.97 x x 15.0 015. 65 0.0037 97.82 x x notes: - l 2 t calculated at 8ms. - resistance is measured at 10% of rated current, 25oc
59 ? 2009 littelfuse, inc. specifcations are subject to change without notice. surface mount fuses 451/453 series nano 2? > very fast-acting > 451/453 series 451/453 series please refer to www.littelfuse.com/series/451.html or /453.html for current information. 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 120 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. refow - temperature (t l ) (liquidus) 217c - temperature (t l ) 60 C 90 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 temperature rerating curve 1000.000 10 0 10 1 0.1 0.0 1 0.00 1 .062a .125a .250a .375a .500a .750a 1a 1.5a 2a 2.5a 3a 3.5a 4a 5a 7a 10 a 12 a 15 a 0.05 0.1 11 01 00 1 000 time in seconds current in amperes 8a .160a .200a .315a note: 1. derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. wave soldering parameters 260c peak temperature, 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
introduction to circuit protection introduction to circuit protection transientology 60 ? 2009 littelfuse, inc. specifcations are subject to change without notice. surface mount fuses 451/453 series nano 2? > very fast-acting > 451/453 series please refer to www.littelfuse.com/series/451.html or /453.html for current information. materials body: ceramic terminations : gold-plated caps (for 451 rohs/hf series) snpb plated caps (for 451 non-rohs series) silver-plated caps (for 451 rohs below 160ma rating & 453 series) product marking brand, ampere rating operating temperature -55c to 125c moisture sensitivity level level 1, j-std-020c solderability mil-std-202, method 208 insulation resistance (after opening) mil-std-202, method 302, test condition a (10,000 ohms minimum) thermal shock mil-std-202, method 107, test condition b, 5 cycles, -65c / +125c, 15 minutes @ each extreme mechanical shock mil-std-202, method 213, test i: deenergized. 100gs pk amplitude, sawtooth wave 6ms duration, 3 cycles xyz+xyz = 18 shocks vibration mil-std-202, method 201: 0.03 amplitude, 10-55 hz in 1 min. 2hrs each xyz=6hrs moisture resistance mil-std-202, method 106, 10 cycles salt spray mil-std-202, method 101, test condition b (48hrs) resistance to soldering heat mil-std-202, method 210, test condition b (10 sec at 260c) product characteristics dimensions packaging part numbering system f 7 a 6.86 (.270") 3.15 (.124") 2.95 (.116") 1.96 (.077") 2.69 .25 (.106") 2.69 .25 (.106") 1.45 (.057") 6.10 .20 (.240") recommended pad layout packaging option packaging specifcation quantity quantity & packaging code 12mm tape and reel eia rs-481-2 (iec 286, part 3) 5000 nr 12mm tape and reel eia rs-481-2 (iec 286, part 3) 1000 mr 0451 001. m r l series amp c ode quantity c ode packaging c ode refer to electrical characteristics table m = 1000 pcs n = 5000 pcs r = tape and reel r o hs c ompliant & halogen free 451 = gold / snpb / silver plated caps 453 = silver plated caps note: l suffx applies to 451 series only - 451 series may be ordered as either rohs and hf (l suffx) or non-rohs (no suffx) version. - 453 series is available only as rohs compliant version and does not require l suffx. please do not include l suffx within 453 series ordering instructions.
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