i r1 i r2 i r3 i r4 c t1 c t2 types v r@ v r v r = 20 v v r = v rwm v r =v r = = 20 v = v rwm t a = 150c t a = 150c 0v 1.5v na dc a dc a dc a dc pf pf 1n6638 35 0.5 50 100 2.5 2.0 1n6642 25 0.5 50 100 5.0 2.8 1n6643 50 0.5 75 160 5.0 2.8 75 6 lake street, lawrence, massachusetts 01841 phone (978) 620-2600 fax (781) 689-0803 website: http://www.microsemi.com v br v rwm v f1 v f2 @i f2 t fr t rr types @ i r i fm i f =100a = 10 ma = 50 ma (pulsed) (pulsed) v (pk) v (pk) v dc v dc ma ns ns (min) 1n6638 150 125 0.8 1.1 200 20 4.5 1n6642 100 75 0.8 1.2 100 20 5.0 1n6643 75 50 1.0 1.2 100 20 6.0 maximum ratings operating temperature: -65c to +175c storage temperature: -65c to +175c operating current: 300 ma derating: 3.0 ma/c above t l = + 75c @l = 3/8? surge current: i fsm = 2.5a, half sine wave, p w = 8.3ms electrical characteristics @ 25c, unless otherwise specified. ? 1n6638,1n6642, 1n6643 available in jan, jantx, jantxv, and jans per mil-prf-19500/578 ? switching diodes ? non-cavity glass package ? metallurgically bonded 1n6638 1n6642 1n6643 design data case: hermetically sealed, ?d? body per mil-prf- 19500/578. d-5d lead material: copper clad steel lead finish: tin / lead thermal resistance: ( r o jl ): 160 c/w maximum at l = .375 thermal impedance: ( z o jx ): 25 c/w maximum polarity: cathode end is banded. mounting position: any figure 1 0.056/0.075 1.42/1.91 0.140/0.180 3.55/4.57 1.00 25.4 0.018/0.022 0.46/0.56 polarity band (cathode)
76 in6638, in6642 and in6643 .2 .3 .4 .5 .6 .7 .8 .9 1.0 1.1 1.2 vf - forward voltage (v) figure 2 typical forward current vs forward voltage i f - forward current - (ma) 1000 100 10 1 0.1 150oc 100oc 25oc -65oc 20 40 60 80 100 120 140 percent of reverse working voltage (%) figure 3 typical reverse current vs reverse voltage i r - reverse current - ( a) 1000 100 10 1 0.1 .01 .001 150oc 100oc 25oc -65oc note : all temperatures shown on graphs are junction temperatures
|
