53 ?2009 littelfuse, inc. speci?cations are subject to change without notice. transient voltage suppression diodes revision: january 09, 2009 smdj series surface mount C 3000w > smdj series please refer to http://www.littelfuse.com/series/smdj.html for current information. smdj series agency agency file number e230531 smdj series the smdj series is designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. description maximum ratings and thermal characteristics (t a =25 o c unless otherwise noted) agency approvals parameter symbol value unit peak pulse power dissipation at t a =25oc by 10x1000s wavef orm (fig.1)(note 1), (note 2) p ppm 3000 w power dissipation on in?nite heat sink at t a =50 o c p m(av) 6.5 w peak forward surge current, 8.3ms single half sine wave (note 3) i fsm 300 a maximum instantaneous forward voltage at 100a for unidirectional only v f 3.5 v operating junction and storage temperature range t j , t stg -65 to 150 c typical thermal resistance junction to lead r ujl 15 c/w typical thermal resistance junction to ambient r uja 75 c/w notes: 1. non-repetitive current pulse , per fig. 3 and derated above t a = 25 o c per fig. 2. 2. mounted on copper pad area of 0.31x0.31 (8.0 x 8.0mm) to each terminal. 3. measured on 8.3ms single half sine wave or equivalent square wave for unidirectional device only, duty cycle=4 per minute maximum. tvs devices are ideal for the protection of i/o interfaces, v cc bus and other vulnerable circuits used in telecom, computer, industrial and consumer electronic applications. applications features t ) b m p h f o ' s f f t 3 p ) 4 d p n q m j b o u t ' p s t v s g b d f n p v o u f e applications in order to optimize board space t - p x q s p m m f q b d l b h f t # v j m u j o t u s b j o s f m j f g t 5 z q j d b m n b y j n v n temperature coef?cient v br = 0.1% x v br @25c x t t ( m b t t q b t t j w b u f e d i j q junction t 8 q f b l q v m t f q p x f s capability at 101000s wavef orm, repetition rate (duty cycles):0.01% t ' b t u s f t q p o t f u j n f typically less than 1.0ps from 0v to bv min t & |