61 ? 2009 littelfuse, inc. specifications are subject to change without notice. surface mount fuses 452/454 series nano 2? > slo-blo ? > 452/454 series 452/454 series please refer to www.littelfuse.com/series/452.html or /454.html for current information. 452/454 series fuse description the nano 2 slo-blo ? fuse has enhanced inrush withstand characteristics over the nano 2 fast-acting fuse. the unique time delay feature of this fuse design helps solve the problem of nuisance opening by accommodating inrush currents that normally cause a fast-acting fuse to open. features t 5 j n f - b h 4 m p # m p t 4 n b m m t j [ f t 8 j e f s b o h f p g d v s s f o u s b u j o h b w b j m b c m f n " u p " 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 de-rating t 3 p ) 4 d p n q m j b o u t ) b m p h f o ' s f f electrical characteristics for series % of ampere rating opening time 100% 4 hours, minimum 200% 1 sec., min.; 60 sec., max. t f d
. j o t f d
. b y 800% 0.02 sec., min.; 0.1 sec., max. ps e electrical specifications 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 b n q f s f t ! 7 " $ 7 % $ b n q f s f t ! 7 % $ 1 4 & |