1N4450 high speed switching diode features : ? high switching speed: max. 4 ns ? reverse voltage:max. 30 v ? peak reverse voltage:max. 40 v ? pb / rohs free mechanical data : case: do-35 glass case weight: approx. 0.13g maximum ratin g s and thermal characteristics ( ta = 25 c) symbol value unit v rm 40 v v r 30 v maximum forward dc current i f 250 ma maximum average forward current i f(av) ma maximum surge forward current at tp = 1 s i fsm 4a power dissipation p d 500 mw maximum junction temperature t j 200 c storage temperature range t stg -65 to + 200 c electrical characteristics ( ta = 25 c) parameter symbol min. typ. max. unit v r = 30 v - - 50 na v r = 30 v , tj = 150 c- - 50 a forward voltage i f = 0.1 ma 0.42 - 0.54 i f = 1.0 ma 0.52 - 0.64 i f = 10 ma 0.64 - 0.72 i f = 50 ma 0.80 - 0.92 i f = 200 ma - - 1.00 reverse breakdown voltage v (br)r i r = 5 a (pulsed) 40 - - v diode capacitance cd - - 4 pf i f = 10 ma ,v r = 6 v, r l = 100 page 1 of 2 rev. 01 : may 9, 2006 v 200 parameter maximum peak reverse voltage maximum reverse voltage reverse current test condition reverse recovery t trr i r v f ns 4 f = 1mhz ; v r = 0 - - do - 35 glass (do-204ah) 0.079(2.0 )max. 0.150 (3.8) max. 0.020 (0.52)max. dimensions in inches and ( millimeters ) 1.00 (25.4) min. 1.00 (25.4) min. cathode mark
rating and characteristic curves ( 1N4450 ) fig1. - forward current vs. fig.2 - reverse current vs. forward voltage junction temperature fig3. - capacitance between fig. 4 - reverse recovery time vs. terminals vs. reverse voltage forward current page 2 of 2 rev. 01 : may 9, 2006 forward current, i f (ma) forward voltage , v f (v) 0 0.1 0.2 0.4 0.6 0.8 1.2 1.0 10 100 1000 10 100 1000 10000 1.0 0 20 40 60 80 100 reverse current, i r (na) reverse voltage , v r (v) 0102030 diode capacitance, cd (pf) 2.5 2.0 1.5 1.0 0.5 0 t j = 125 t j = 25 c f = 1 mhz ta = 25 c 1.0 reverse recovery time, trr (ns) 5 4 3 2 1 0 048 1620 reverse voltage , v r (v) reverse voltage , v r (v) t j = 25 c t j = 75 c t j = 50 c v r = 6 v f = 1 mhz ta = 25 c 12
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