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| 1 cartridge and axial lead fuses ?2008 littelfuse, inc. speci?cations are subject to change without notice. please refer to www.littelfuse.com for current information. revised: august 14, 2008 251/253 series pico ? ii > very fast-acting > 251/253 series cartridge and axial lead fuses pico ? ii > very fast-acting > 251/253 series 251/253 series, pico ? ii, very fast-acting fuse description the pico ? ii very fast-acting fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package. agency approvals agency agency file number ampere range ? e10480 62ma - 15a ? ps e jet 1896-31007-1001 1a - 5a tuv j02037794 500ma - 10a qp l fm10 62ma - 15a features electrical characteristics t 7 f s z g b t u b d u j o h t 4 n b m m t j [ f t 8 j e f d v s s f o u s b u j o h s b o h f (62ma- 15a) t 3 p ) 4 d p n q m j b o u t 8 j e f p q f s b u j o h temperature range t - p x u f n q f s b u v s f e f s b u j o h % of ampere rating ampere rating opening time 100% 1/16C15 ) p v s t
min. 200% 1/16C7 4 f d p o e t
max. 10 4 f d p o e t
max. 12-15 4 f d p o e t
max. applications ampere rating (a) amp code ordering number (std.) ordering number (mil.) max voltage rating (v) interrupting rating nominal cold resistance (ohms) nominal melting i 2 t (a 2 sec) nom voltage drop (mv) agency approvals ? ? ps e tuv qpl .062 .062 251.062 253.062 125 300 amperes at rated w p m u b h f 7 % $ 50 amperes at s b u f e w p m u b h f vac 7.000 0.000113 1.4 x x x .125 .125 251.125 253.125 125 1.700 0.00174 0.285 x x x .250 .250 251.250 253.250 125 0.665 0.0116 0.24 x x x .375 .375 251.375 253.375 125 0.395 0.0296 0.215 x x x .500 .500 251.500 253.500 125 0.280 0.0598 0.2165 x x x x .750 .750 251.750 253.750 125 0.175 0.153 0.176 x x x x 1.00 001. 251001. 253001. 125 0.128 0.256 0.194 x x x x x 1.25 1.25 2511.25 125 0.100 0.390 0.2 x x x x 1.50 01.5 25101.5 25301.5 125 0.0823 0.587 0.21 x x x x x 2.00 002. 251002. 253002. 125 0.0473 0.405 0.141 x x x x x 2.50 02.5 25102.5 125 0.0360 0.721 0.132 x x x x 3.00 003. 251003. 253003. 125 0.0290 1.19 0.131 x x x x x 3.50 03.5 25103.5 125 0.0240 1.58 0.1205 x x x x 4.00 004. 251004. 253004. 125 0.0204 2.45 0.114 x x x x x 5.00 005. 251005. 253005. 125 0.0155 4.14 0.11 x x x x x 7.00 007. 251007. 253007. 125 0.0105 10.4 0.102 x x x x 10.0 010. 251010. 253010. 125 0.00705 25.5 0.1 x x x x 12.0 012. 251012. 32 0.0055 45.2 0.0878 x x 15.0 015. 251015. 253015. 32 0.00446 68.8 0.071 x x x electrical characteristics note: ) j h i f s b n q f s f s b u j o h t b s f b w b j m b c m f 1 m f b t f d p o u b d u - j u u f m g v t f 5 f d i o j d b m 4 v q q p s u p s z p v s - j u u f m g v t f q s p e v d u t s f q s f t f o u b u j w f g p s b t t j t u b o d f rohs ? ps e t ' m b u o q b o f m e j t q m b z 5 7 t - $ % n p o j u p s t - $ % c b d l m j h i u j o w f s u f s t 0 g m d f n b d i j o f t t 1 p x f s t v q q m z t " v e j p 7 j e f p t z t u f n t - j h i u j o h t z t u f n t . f e j d b m f r v j q n f o u 4 f d p o e b s z q s p u f d u j p o g p s t q b d f d p o t u s b j o f e b q q m j d b u j p o t tuv ? qpl
2 cartridge and axial lead fuses ?2008 littelfuse, inc. speci?cations are subject to change without notice. please refer to www.littelfuse.com for current information. revised: august 14, 2008 251/253 series pico ? ii > very fast-acting > 251/253 series cartridge and axial lead fuses pico ? ii > very fast-acting > 251/253 series average time current curves temperature rerating curve soldering parameters 100 10 1 0.1 0.01 0.001 0.062a 0.05 0.1 1 10 100 1000 0.125a 0.250a 0.375a 0.50a 0.75a 1.00a 1.50a 2.0a 2.5a 3.0a 3.5a 4a 5a 7a 10a 12a 15a time in seconds current in amperes 1.25a wave parameter lead-free recommendation preheat: % f q f o e t p o ' m v y " d u j w b u j p o 5 f n q f s b u v s f 5 z q j d b m * o e v t u s z 3 f d p n n f o e b u j p o temperature minimum: 100 c temperature maximum: 150 c preheat time: 60-180 seconds solder pot temperature: 260 c maximum solder dwell time: 2-5 seconds recommended hand-solder parameters: 4 p m e f s * s p o 5 f n q f s b u v s f ? $ ? $ ) f b u j o h 5 j n f t f d p o e t n b y note: these devices are not recommended for ir or convection re?ow process. recommended process parameters: 3 cartridge and axial lead fuses ?2008 littelfuse, inc. speci?cations are subject to change without notice. please refer to www.littelfuse.com for current information. revised: august 14, 2008 251/253 series pico ? ii > very fast-acting > 251/253 series cartridge and axial lead fuses pico ? ii > very fast-acting > 251/253 series materials & o d b q t v m b u f e & q p y z $ p b u f e # p e z 1 v s f 5 j o d p b u f e $ p q q f s x j s f m f b e t solderability . * - 4 5 % . f u i p e lead pull force . * - 4 5 % . f u i p e 5 f t u $ p o e j u j p o " x j m m x j u i t u b o e b m c t b y j b m q v m m u f t u fuses to mil spec 4 f s j f t j t b w b j m b c m f j o ' . p o 2 1 - g p s . * - 1 3 ' 5 p p s e f s d i b o h f 251 to 253 product characteristics operating temperature o ? $ u p ? $ shock . * - 4 5 % . f u i p e 5 f t u condition i (100 gs peak for 6 n j m m j t f d p o e t vibration . * - 4 5 % . f u i p e o ) [ . f u i p e 5 f t u $ p o e j u j p o $ o ) [ b u ( t 1 f b l moisture resistance . * - 4 5 % . f u i p e resistance to soldering heat 8 j u i t u b o e t t f d p o e t b c p w f o c and up to 260o $ n b y j n v n flammability rating ul 94vC0 wire diameter: 0.64 (.025") for 0.62-10.0 amp, 0.81 (.032") for 15 amp wire diameter: 0.64 (.025") for 0.62-10.0 amp, 0.81 (.032") for 12-15 amp 2.80 (.11") max 6.35 (.25") tape 5.0 (.197") 6.35 (.25") tape 38.1 (1.5") 38.1 (1.5") 7.11 (.280") 83.31 (3.28") 253 series (t3 lead length) f l 1 a f l 1 a 73.0 (2.874")** f l 1 a f l 1 a 27.78 (1.094") 27.78 (1.094") 7.11 (.280") 62.7 (2.468") 52.4 (2.062")* 2.80 (.11") max 6.35 (.25") tape 5.0 (.197") 6.35 (.25") tape 251 series (t1 lead length) dimensions packaging part numbering system packaging option packaging speci?cation quantity & packaging code 5 n n 5 b q f b o e 3 f f m eia 296 1 m f b t f s f g f s u p b w b j m b c m f r v b o u j u j f t b c p w f j o 1 b s u / v n c f s j o h 4 z t u f n w 5 n n h 5 b q f b o e 3 f f m eia 296 0251 xxxx n r t1 l rohs lead length type of packaging quantity current rating series the default lead length for ammo pack and loose pack is now t1 for 251 series, and remains t3 for 253 series, therefore: t1 = 52.4mm (2.062), 251 series only* blank = 52.4mm (2.062) for 251 series* or 73mm (2.874) for 253 series** r = reel a = ammo pack x = loose pack n = 5000 p = 2000 m = 1000 h = 100 v = 5 refer to amp code column of electrical characteristics table 251 = standard type 253 = military type 5 i f e f g b v m u m f b e m f o h u i g p s c p u i b n n p q b d l b o e m p p t f q b d l j t 5 g p s b o e j t 5 g p s / p u f t 5 e j n f o t j p o j t e f m o f e b t u i f m f o h u i p g u i f d p n q p o f o u c f u x f f o u i f u x p u b q f t 5 i f g v m m d p n q p o f o u m f o h u i j t n n t1 length is for 251 series only. 5 e j n f o t j p o j t e f m o f e b t u i f m f o h u i p g u i f d p n q p o f o u c f u x f f o u i f u x p u b q f t 5 i f g v m m d p n q p o f o u m f o h u i j t n n w t3 length is for 253 series only. |
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