1N4448W fast switching diode case : molded plastic body terminals : plated leads solderable per mil-std-750, method 2026 polarity : polarity symbols marked on case marking :t5 features mechanical data dimensions in millimeters and (inches) fast switching speed surface mount package ideally suited for automatic insertion for general purpose switching applications high conductance electrical ratings @t a =25c symbols conditions v (br)r v f1 v f2 v f3 v f4 i r1 i r2 reverse brdakdown voltage forward voltage reverse current capacitance between terminals reverse recovery time parameter min. typ. max. unit v v v v v pf ns i r =10 u a i f =5ma i f =10ma i f =100ma i f =150ma v r =75v v r =20v v r =0v,f=1.0mhz i f =i r =10ma irr=0.1xi r ,r l =100 0.72 0.855 1.0 1.25 2.5 25 4 53 500 250 4.0 2.0 400 315 -65 to +150 100 maximum ratings and electrical characteristics, single diode @t a =25c symbols units v rrm v rwm v r peak repetitive peak reverse voltage working peak reverse voltage dc blocking voltage rms reverse voltage forward continuous current average rectified output current peak forward surge current @=1.0 u s @=1.0s power dissipation thermal resistance junction to ambient storage temperature non-repetitive peak reverse voltage t stg v rm v v ma ma a mw k/w c v limits 75 v r(rms) i fm i o pd parameter i fsm r q ja na u a c t t rr 75 0.62 4 1.15(.045) 1.05(.041) .25(.010) min sod-123 1.80(.071) 1.40(.055) 3.86(0.152) 3.56(0.145) 2.84(0.112) 2.54(0.100) .71(0.028) .50(0.020) 1.35(.053) .94(.037) .15(.006) max .135(.005) .127(.004) 0.6(.023) 0.5(.020) 3.9(0.154) 3.7(0.146) 1.65(.065) 1.55(.061) 2.7(0.106) 2.6(0.102) mdd electronic
ratings and characteristic curves 1N4448W 0 200 400 600 800 1000 v f forward voltage (mv) fig. 2-typical forward characteristics fig. 1- power derating curve p d .power dissipation(mw) 100 10 1.0 0.1 t a ,ambient temperature( c ) i f , forward current(a) 600 500 400 300 200 100 0 0 25 50 75 100 125 150 fig. 3- typical reverse characteristics i r ,reverse current( u a) 0 20 40 60 80 10 1.0 0.1 0.01 0.001 v r, reverse voltage (v) fig. 4- reverse recovery time vs forward current t rr , reveerse recovery time (ns) 0 20 40 60 80 100 2.5 2.0 1.5 1.0 0.5 0 v r, forward current (ma) t a =85 c t a =50 c t a =25 c t a =0 c t a =-30 c t a =100 c t a =75 c t a =50 c t a =25 c t a =0 c t a =-30 c fig. 5- total capacitance vs reverse voltage c t .total capacitance (pf) v r ,reverse voltage (v) 4 3 2 1 0 0 1 2 3 4 5 6 f=1mhz mdd electronic
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