95 ? 2009 littelfuse, inc. specications are subject to change without notice. surface mount fuses 157 series nano 2? > 157 fuse and holder combination please refer to www.littelfuse.com/series/157.html for current information. 157 series 157 series C standard nano fuse and clip assembly description the 157 series C standard nano fuse/clip assembly is a small, square, very fast acting surface mount fuse that is assembled in surface mountable fuse clips. the fuse clip and pre-installed fuse combination can be automatically placed in pc board in one efcient manufacturing operation. it permits quick and easy replacement of fuses without performing desoldering process, even in the eld and without exposing the pc board to detrimental effects of rework solder heat. agency approvals agency agency file number ampere range e14721 0.062a ~ 10a ps e nbk030205-e10480a nbk030205-e10480b nbk101105-e184655 1a 1.5a - 5a 6.3a - 10a features electrical characteristics for series t 4 v s g b d f . p v o u b c m f
very fast acting fuse. t ' v m m z d p n q b u j c m f x j u i rohs/pb-free solder alloys and higher temperature proles associated with leadfree assembly. t & b t j m z s f q m b d f b c m f on pc board (field replaceable) t 3 p ) 4 d p n q m j b o u b o e halogen free t " w b j m b c m f j o s b u j o h t p g 0.062 ~ 10 amperes. % of ampere rating opening time at 25oc 100% i p v s t . j o j n v n 200% t f d t . b y j n v n applications electrical specications by item 1. cold resistance measured at less than 10% of rated current at 23oc. 2. i 2 t values stated for 8ms opening time. 3. agency approval table key: x=approved or certied, p=pending and blank=not approved 4. have special electrical characteristic needs? contact littelfuse to learn more about application specic options. t * o t u s v n f o u b u j p o t # b t f 4 u b u j p o t t 5 f m f d p n n v o j d b u j p o t ps e revised: february 19, 2010 ampere rating (a) amp code max voltage rating (v) interrupting rating (a) fuse furnished nominal cold resistance (ohms) nominal melting i 2 t (a 2 sec) agency approvals ps e 0.062 .062 125 50a @ 125 vac/vdc 300a @ 32 vdc 0451.062 5.5372 0.00019 x 0.080 .080 125 0451.080 4.0500 0.00033 x 0.100 .100 125 0451.100 3.1000 0.00138 x 0.125 .125 125 0451.125 1.7059 0.00286 x 0.160 .160 125 0453.160 1.2157 0.0048 x 0.200 .200 125 0453.200 1.3971 0.00652 x 0.250 .250 125 0453.250 1.0496 0.01126 x 0.315 .315 125 0453.315 0.3881 0.0311 x 0.375 .375 125 0453.375 0.6083 0.0425 x 0.400 .400 125 0453.400 0.5600 0.0484 x 0.500 .500 125 0453.500 0.4181 0.0795 x 0.630 .630 125 0453.630 0.3050 0.143 x 0.750 .750 125 0453.750 0.2458 0.185 x 0.800 .800 125 0453.800 0.2120 0.271 x 1.0 001. 125 0453001. 0.1537 0.459 x x 1.25 1.25 125 04531.25 0.078 0.664 x x 1.5 01.5 125 045301.5 0.0634 0.853 x x 1.6 01.6 125 045301.6 0.0580 1.060 x x 2.0 002. 125 0453002. 0.0373 0.530 x x 2.5 02.5 125 045302.5 0.0288 1.029 x x 3.0 003. 125 0453003. 0.0229 1.650 x x 3.15 3.15 125 04533.15 0.0215 1.920 x x 3.5 03.5 125 045303.5 0.0203 2.469 x x 4.0 004. 125 0453004. 0.0163 3.152 x x 5.0 005. 125 0453005. 0.0127 5.566 x x 6.3 06.3 125 045306.3 0.0098 9.17 x x 7.0 007. 125 0453007. 0.0092 10.32 x x 8.0 008. 125 0453008. 0.0079 20.23 x x 10.0 010. 125 35a @ 125 vac / 50a @125 vdc 300a @ 32vdc 0453010. 0.0058 26.46 x x
introduction to circuit protection introduction to circuit protection transientology 96 ? 2009 littelfuse, inc. specications are subject to change without notice. surface mount fuses 157 series nano 2? > 157 fuse and holder combination please refer to www.littelfuse.com/series/157.html for current information. average time current curves reow 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. reow - 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 0.001 0.010 0.100 1.000 10.000 0.01 0.1 1 10 100 time in seconds current in amps 0.75 a 0.5 a 0.062a 10.0 a 8.0 a 7.0 a 6.30 a 5.0 a 4.0 a 3.50 a 3.0 a 2.50 a 2.0 a 1.50 a 1.0 a 0.375 a 0.25 a 0.2 a 0.125 a 0.315a note: 1. derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. time temperature 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
97 ? 2009 littelfuse, inc. specications are subject to change without notice. surface mount fuses 157 series nano 2? > 157 fuse and holder combination please refer to www.littelfuse.com/series/157.html for current information. 157 series materials body: ceramic cap: for 0.062a ~ 0.125a C au plated brass for 0.200a ~ 10a C silver plated brass clip plating: . b u u f 5 j o product marking body: brand logo, current rating clip retention force applied at fuse center, perpendicular to u i f m p o h b y j t ! m c t . * /
solderability . * - 4 5 %
. f u i p e * 1 $ & * " + & % & $ + 4 5 % #
5 f t u $ p o e j u j p o " humidity test . * - o 4 5 %
. f u i p e ! ? $ 3 )
1000 hours resistance to solvents . * - 4 5 %
. f u i p e t p m w f o u u z q f t
product characteristics operating temperature -55oc to 125oc with proper derating thermal shock . * - 4 5 %
. f u i p e
test condition b (5 cycles -65oc to +125oc) vibration . * - 4 5 %
. f u i p e (10-55 hz) moisture resistance . * - 4 5 %
. f u i p e
10 cycles salt spray/ atmosphere . * - 4 5 %
. f u i p e
test condition b (48 hrs.), 5% nacl in de-ionized water shock . * - 4 5 %
. f u i p e
test condition i (100 gs peak for 6 milliseconds) dimensions 6.10 [0.240] 1. 4 5 [0.0 5 7] 2.69 [0.106] 2.69 [0.106] 3.7 0.13 [0.146] l 1a f 6. 5 0 0.20 [0.2 5 6] 7.26 [0.29] 3.00 [0.12] 2.46 [0.10] 2.40 [0.09] 3.70 [0.146] 3.40 [0.134] 3.90 0.13 [0.1 5 4] 2. 5 0 0.2 [0.098] "a" "b" 0.10 packaging packaging option packaging specication quantity quantity & packaging code tape and reel 4 v s g b d f . p v o u 1500 dr part numbering system pcb recommendation for thermal management . j o j n v n $ p q q f s - b z f s 5 i j d l o f t t v n . j o j n v n $ p q q f s 5 s b d f 8 j e u i n n 0157 001. d r series amp code quantity code packing option d = 1500 pcs r = tape and reel note: alternate methods of thermal management may be used. in such cases, under normal operations, the maximum temperature of the fuse body should not exceed 80oc in a 25oc ambient environment.
introduction to circuit protection introduction to circuit protection transientology 98 ? 2009 littelfuse, inc. specications are subject to change without notice.
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