dl4728a thru dl4753a page: 1 frontier electronics corp. 667 e. cochran street, simi valley, ca 93065 tel: (805) 522-9998 fax: (805) 522-9989 e-mail: frontiersales@frontierusa.com web: http://www.frontierusa.com 1watt melf zener diode dl4728a thru dl4753a features z low cost z small size mechanical data z case: melf dimensions in inches and (millimeters) z terminals: solderable per mil-std -202, method 208 z polarity: color band denotes cathode z mounting position: any z weight: 0.135 grams maximum ratings and electrical characteristics ratings at 25 c ambient temperature unless otherwise specified storage and operating temperature range -55 to + 150 c electrical characteristics (ta=25 unless otherwise noted) vf=1.2v max, if = 200ma for all types maximum zener impedance leakage current jedec type no nominal zener voltage v z @ i zt volts test current i zt ma z zt @ i zt ohms z zk @ i zk ohms i zk ma i r a max v r volts surge current @ ta=25 i r ma dl4728a dl4729a dl4730a dl4731a dl4732a dl4733a dl4734a dl4735a dl4736a dl4737a dl4738a dl4739a dl4740a dl4741a dl4742a dl4743a dl4744a dl4745a dl4746a dl4747a dl4748a dl4749a dl4750a DL4751A dl4752a dl4753a 3.3 3.6 3.9 4.3 4.7 5.1 5.6 6.2 6.8 7.5 8.2 9.1 10 11 12 13 15 16 18 20 22 24 27 30 33 36 76 69 64 58 53 49 45 41 37 34 31 28 25 23 21 19 17 15.5 14 12.5 11.5 10.5 9.5 8.5 7.5 7.0 10 10 9 9 8 7 5 2 3.5 4 4.5 5 7 8 9 10 14 16 20 22 23 25 35 40 45 50 400 400 400 400 500 550 600 700 700 700 700 700 700 700 700 700 700 700 750 750 750 750 750 1000 1000 1000 1 1 1 1 1 1 1 1 1 0.5 0.5 0.5 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 100 100 50 10 10 10 10 10 10 10 10 10 10 5 5 5 5 5 5 5 5 5 5 5 5 5 1 1 1 1 1 1 2 3 4 5 6 7 7.6 8.4 9.1 9.9 11.4 12.2 13.7 15.2 16.7 18.2 20.6 22.8 25.1 27.4 1380 1260 1190 1070 970 890 810 730 660 605 550 500 454 414 380 344 304 285 250 225 205 190 170 150 135 125 note: suffix "a" for 5 solderable ends .105(2.67) .095(2.41) .205(5.2) .190(4.8) .022(.60) .018(.46)
dl4728a thru dl4753a page: 2 ratings and characteristic curves dl4728a thru dl4753a figure 3. typical thermal resistance versus lead length 1000 700 500 200 100 70 50 20 10 7 5 2 1 z z dynamic impedance (ohms) 1 2 3 5 7 10 20 30 50 70 100 v z, zener current (ma) i z =1ma 5ma 20ma t j =25 i z (ms)=0.1i z (do) f=60h z figure 4. effect of zener current 400 300 200 100 50 20 10 8 4 c, capacitance ( p f) 1 2 5 10 20 50 100 v z , nominal v z (volts) 50%of breakdown bias 0vbias 0vbias fig.1a- range for units to 12 volts +12 +10 +8 +6 +4 +2 0 -2 -4 v z , temperature coefficient ( mv/ ) 2 3 4 5 6 7 8 9 10 11 12 v z , zener voltage (volts) range v z i zt fig.1b- range for units to 12 to 100 volts 100 70 50 30 20 10 7 5 3 2 1 v z , temperature coefficient ( mv/ ) 10 20 30 50 70 100 v z , zener voltage (volts) range v z i zt fi g ure 2. tem p erature coefficients ( -55 to+150 tem p erature chan g e ; 90% of the units are in the ran g es indicated. ) 175 150 125 100 75 50 25 0 jl, junction to lead thermal resistance (mv/ /w) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 +6 +4 +2 0 -2 -4 v z , temperature coefficient ( mv/ ) 3 4 5 6 7 8 20ma 1ma 0.01ma v z i z t a =25 note: below 3 volts and above 8 volts changes in zener current do not affect temperature coefficients l, lead length to heat sink (inches) v z , zener voltage ( volts ) 1.25 1.0 0.75 0.5 0.25 figure. 7 - power temperature derating curve 0 20 40 60 80 100 120 140 160 180 200 t l , lead temperature ( o c) p d ,maximum dissipation (watts)
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