8700 e. thomas road scottsdale, az 85252 phone: ( 480 ) 941-6300 fax: ( 480 ) 947-1503 smaj4728a thru smaj4764a silicon 2 watt zener diodes do-214ac (smaj) features for surface mount applications (flat handling surface for accurate placement) 3.3 thru 100 volt voltage range high surge current rating higher voltages available electrically equivalent to jedec registered 1n4728a thru 1n4764a available on tape and reel. dimensions inches mm dim min max min max note a .078 .115 1.98 2.92 1 b .052 .058 1.32 1.47 c --- .005 --- .127 d --- .02 --- .51 e .030 .060 .76 1.52 f .055 .075 1.65 2.13 g .194 .216 4.93 5.48 h .160 .180 3.99 4.50 j .100 .110 2.57 2.79 note 1 : this maximum dimension is larger than the standard jedec call out. standard jedec is .105 inches or 2.66 mm. mechanical data package similar to jedec do-214ac (see dimension ?a? note) terminals solderable per mil-std-750, method 2026 polarity is indicated by cathode band. maximum temperature for soldering: 260 o c for 10 seconds. for surface mount applications with flame retardent epoxy meeting ul94v-0 maximum ratings @ 25 c unless otherwise specified maximum forward voltage v f 1.2v (note: 1) peak surge current i s see table 1 steady state power dissipation p (av) 2.0w (note: 2,3) operating and storage temperatures t j ,t stg -55 c to +150 c thermal resistance r q jl 25 o c/w notes: 1. forward current @ 200ma. 2. mounted on 4.0mm 2 copper pads to each terminal. 3. lead temperature at 100 c or less. derate linearly above 100 c to zero power at 150 c. data sheet#msc0284a.pdf date: 05/01/97 h j e f g a b d c 0.075 0.095? 0.078 pad layout
electrical characteristics @ 25 c unless otherwise specified part number zener voltage (v z ) (note 4) test current (i zt ) maximum dynamic impedance (z zt @ i zt ) (note 2) maximum reverse current (i r @ v r ) test voltage (v r ) maximum regulator current (i zm ) t l = 100 o c maximum knee impedance (z zk @ i zk ) (note 2) test current (i zk ) maximum (surge) current (i s ) (note 3) volts ma ohms mm a volts ma ohms ma ma smaj4728a 3.3 76 10 100 1 552 400 1.0 1380 smaj4729a 3.6 69 10 100 1 504 400 1.0 1260 smaj4730a 3.9 64 9 50 1 468 400 1.0 1190 smaj4731a 4.3 58 9 10 1 434 400 1.0 1070 smaj4732a 4.7 53 8 10 1 386 500 1.0 970 smaj4733a 5.1 49 7 10 1 356 550 1.0 890 smaj4734a 5.6 45 5 10 2 324 600 1.0 810 smaj4735a 6.2 41 2 10 3 292 700 1.0 730 smaj4736a 6.8 37 3.5 10 4 266 700 1.0 660 SMAJ4737A 7.5 34 4.0 10 5 242 700 0.5 605 smaj4738a 8.2 31 4.5 10 6 220 700 0.5 550 smaj4739a 9.1 28 5.0 10 7 200 700 0.5 500 smaj4740a 10 25 7 10 7.6 182 700 0.25 454 smaj4741a 11 23 8 5 8.4 166 700 0.25 414 smaj4742a 12 21 9 5 9.1 152 700 0.25 380 smaj4743a 13 19 10 5 9.9 138 700 0.25 344 smaj4744a 15 17 14 5 11.4 132 700 0.25 304 smaj4745a 16 15.5 16 5 12.2 114 700 0.25 285 smaj4746a 18 14 20 5 13.7 100 750 0.25 250 smaj4747a 20 12.5 22 5 15.2 90 750 0.25 225 smaj4748a 22 11.5 23 5 16.7 82 720 0.25 205 smaj4749a 24 10.5 25 5 18.2 76 750 0.25 190 smaj4750a 27 9.5 35 5 20.6 68 750 0.25 170 smaj4751a 30 8.5 40 5 22.8 60 1000 0.25 150 smaj4752a 33 7.5 45 5 25.1 54 1000 0.25 135 smaj4753a 36 7.0 50 5 27.4 50 1000 0.25 125 smaj4754a 39 6.5 60 5 29.7 46 1000 0.25 115 smaj4755a 43 6.0 70 5 32.7 44 1500 0.25 110 smaj4756a 47 5.5 80 5 35.8 38 1500 0.25 95 smaj4757a 51 5.0 95 5 38.8 36 1500 0.25 90 smaj4758a 56 4.5 110 5 42.6 32 2000 0.25 80 smaj4759a 62 4.0 125 5 47.1 28 2000 0.25 70 smaj4760a 68 3.7 150 5 51.7 26 2000 0.25 65 smaj4761a 75 3.3 175 5 56.0 24 2000 0.25 60 smaj4762a 82 3.0 200 5 62.2 22 3000 0.25 55 smaj4763a 91 2.8 250 5 69.2 20 3000 0.25 50 smaj4764a 100 2.5 350 5 76.0 18 3000 0.25 45 smaj4728a thru smaj4764a note: 1. the type numbers shown have a 5% tolerance on nominal zener voltage. no suffix signifies a 10% tolerance, c signifies 2%, and d signifies 1% tolerance. 2. the zener impedance is derived from the 60 hz ac voltage, which results when an ac current having an rms value equal to 10% of the dc zener current (i zt or i zk ) is superimposed on i zt . zener impedance is measured at two points to insure a sharp knee on the breakdown curve and eliminate unstable units. 3. the reverse surge current is measured at 25 o c ambient using a ? square wave or equivalent sine wave pulse 1/120 second duration superimposed on i zt . 4. voltage at thermal equilibrium or 90 seconds after application of dc current.
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