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| revised: march 4, 2009 203 ? 2009 littelfuse, inc. specications are subject to change without notice. axial lead & cartridge fuses 275 series please refer to www.littelfuse.com/series/275.html for current information. pico ? > very fast-acting > 275 series 275 series 275 series, pico ? , very fast-acting fuse description the pico ? 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 20a - 30a 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 ) j h i d v s s f o u s b u j o h (20a- 30a) 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 rating % of ampere rating ampere rating opening time 100% 20 - 30 ) p v s t
min. 200% 20 - 30 4 f d p o e t
max. applications ampere rating (a) amp code ordering number max voltage rating (v) interrupting rating nominal cold resistance (ohms) nominal melting i 2 t (a 2 sec) agency approvals 20.0 020. 0275020. 32 b n q f s f t ! s b u f e w p m u b h f vdc b n q f s f t ! s b u f e w p m u b h f vac 0.0031 115 x 25.0 025. 0275025. 32 0.0026 192 x 30.0 030. 0275030. 32 0.0020 288 x electrical characteristics t 1 p x f s t v q q m z t 1 $ t f s w f s t / f u x p s l j o h f r v j q n f o u t 4 u p s b h f t z t u f n
revised: march 4, 2009 introduction to circuit protection introduction to circuit protection transientology 204 ? 2009 littelfuse, inc. specications are subject to change without notice. axial lead & cartridge fuses 275 series please refer to www.littelfuse.com/series275.html for current information. pico ? > very fast-acting > 275 series average time current curves temperature rerating curve soldering parameters 100 10 1 0.1 0.01 0.001 0.05 0.1 1 10 100 1000 time in seconds current in amperes 20a 25a 30a 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 reow process. recommended process parameters: / p u f 1. derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. revised: march 4, 2009 205 ? 2009 littelfuse, inc. specications are subject to change without notice. axial lead & cartridge fuses 275 series please refer to www.littelfuse.com/series/275.html for current information. pico ? > very fast-acting > 275 series 275 series materials 5 s b o t q b s f o u t m f f w f d p w f s f e c p e z 1 v s f 5 j o d p b u f e d 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 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 b o e q f s n f u i p e ( t q f b l g p s 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 % (vibrations of 10-2000 cps at 20 gs) moisture resistance . * - 4 5 % . f u i p e 3/4 a transparent insulating sleeve b b a c dia. 275 000 series amperage 20 - 30 7.87 (.31") 27.78 (1.094") 3.38 (.133") 1.016 (.040") d b c a d dimensions in mm (inches) dimensions packaging part numbering system packaging option packaging specication 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 i 1 b s u / v n c f s j o h 4 z t u f n w 0275 xxxx m r t1 l lead length t1 = 52.4mm (2.062) blank = for loose pack (mxl,vxl) rohs only rohs parts are available for 275 series type of packaging r = reel x = loose pack quantity m = 1000 v = 5 current rating refer to amp code column of electrical characteristics table series 275 5 i f e f g b v m u m f b e m f o h u i g p s m p p t f q b d l j t 5 revised: march 4, 2009 introduction to circuit protection introduction to circuit protection transientology 206 ? 2009 littelfuse, inc. specications are subject to change without notice. |
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