347 ? 2009 littelfuse, inc. specifications are subject to change without notice. special application fuses alarm indicating fuse 481 series 481 series alarm indicating fuse please refer to www.littelfuse.com/series/481.html for current information. 481 series 481 series alarm indicating fuse description agency approvals agency agency file number e71611 lr 29862 electrical characteristics features t $ p m p s d p e f e j o e j d b u p s y b h t j o e j d b u f b n q f s f s b u j o h t $ m f b s q m b t u j d m f o t p q u j p o b w b j m b c m f g p s b e e j u j p o b m t b g f u z t # p e z j t d p o t u s v d u f e p g c m b d l q m p m z q i f o z m f o f t v m ? e f x j u i 6 - 7 y b n n b c j m j u z s b u j o h t $ p o u b d u t n b e f p g c s j h i u b m m p z q m b u f e c f s z j m m j p v n d p q q f s applications % of ampere rating opening time . j o v u f t
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d j s d v j u x i j m f u s j h h f s j o h b o - & % p s b v e j p b m b s n 5 i j t j u f n s f r v j s f t 4 f s j f t n b u j o h g v t f i p m e f s " m m s b o h f t p g 4 f s j f t g v t f t b s f b w b j m b c m f b t p v s p s j h j o b m e f t j h o
b o e u i f b n q s b o h f j t o p x b w b j m b c m f b t b 3 p ) 4 d p n q m j b o u p q u j p o v t f u i f i 1 w e f t j h o b u p s x i f o p s e f s j o h
4 f f u i f q b s u o v n c f s j o h t f d u j p o p g u i j t e b u b t i f f u g p s s f m b u f e p s e f s j o h j o t u s v d u j p o t revised: august 10, 2011
introduction to circuit protection introduction to circuit protection transientology 348 ? 2009 littelfuse, inc. specifications are subject to change without notice. special application fuses alarm indicating fuse 481 series 481 series alarm indicating fuse please refer to www.littelfuse.com/series/481.html for current information. average time current curves 1000 100 10 1 0.1 0.01 1000 100 10 1 0.1 18/100 a 1/4 a 1/2 a 65/100 a 3/4 a 1 a 1 1/3 a 2 a 3 a 4 a 5 a 7 1/2 a 10 a 12 a 15 a 20 a time in seconds current in amperes material # p e z 1 p m z q i f o z m f o f 4 v m ? e f 6 - 7 0
5 f s n j o b u j p o t # f s z m m j v n $ p q q f s 5 j o 1 m b u f e 0 q u j p o b m - f o t / z m p o vibration 1 f s . * - 4 5 % ' product characteristics product characteristics dimensions part numbering system " ' v t f i p m e f s n v t u c f v t f e ' v t f j t l f z f e u p q s f w f o u j o t f s u j p o j o m p x f s s b u f e i p m e f s t " ' v t f i p m e f s j t e f t j h o f e u p b d d f q u b m m s b u j o h t v q u p b n q f s f t 22.9 mm (.90") min. 8 mm . 23") 5.3 mm (.21") 16.9 mm (.665") max. 11. 7 mm (.46") 17.8 mm (.70") 19.6 mm (.77") 21.3 mm (0.84") ref. lens 2.77 (.109") 2.79 (.110") 4.45 (.175") 1-15a 20a* operating temperature C 55 o $ u p o $ thermal shock 8 j u i t u b o e t d z d m f t p g o o $ u p 125 o $ insulation resistance (after opening) ( s f b u f s u i b o
p i n t option code: rohs item option code: series amp code quantity code: blank = standard xl = protective lens blank = standard design item p = rohs compliant version item (available in 2-20 amp range only) 0 4 81 .180 h xl p v = 5 pack h = 100 pack (see electrical characteristics table)
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