1smc5348 thru 1smc5388 surface mount silicon zener diode voltage - 11 to 200 volts power - 5.0 watts features l for surface mounted applications in order to optimize board space l low profile package l built - in strain relief l glass passivated jun ction l low inductance l typical i d less than 1 a above 13v l high temperature soldering : 260 /10 seconds at terminals l plastic package has underwriters laboratory flammability classification 94v - o mechanical data case: jedec do - 214ab molded plastic over passivated junction terminals: solder plated, so lderable per mil - std - 750, method 2026 standard packaging: 16mm tape(eia - 481) weight: 0.007 ounce, 0.21 gram maximum ratings and electrical characteristics ratings at 25 ambient temperature unless otherwise specified. symbol value units dc power dissipa tion @ t l =75 , measure at zero lead length(fig. 1) derate above 75 (note 1) p d 5.0 40.0 watts mw/ peak forward surge current 8.3ms single half sine - wave superimposed on rated load(jedec method) (note 1,2) i fsm see fig. 5 amps operating junction and sto rage temperature range t j ,t stg - 55 to +150 notes: 1. mounted on 8.0mm 2 copper pads to each terminal. 2. 8.3ms single half sine - wave, or equivalent square wave, duty cycle = 4 pulses per minute maximum. do - 214ab
1smc5348 thru 1smc5388 electrical characteris tics (t a =25 unless otherwise noted, v f =1.2 max @ i f =1a for all types. maximum zener impedance max reverse leakage current @ v r volts type no. (note 1.) nominal zener voltage vz @ i zt volts (note 2.) test current i zt ma z zt @ i zt ohms (note 2.) z zk @ i zk = 1 ma ohms (note 2.) i r a non & a suffix b - suffix max surge current ir amps (note 3.) max voltag e regulation vz, volts (note 4.) maximum regulator current i zm ma (note 5.) device marking code 1smc5348 1smc5349 1smc5350 1smc5351 1 1 12 13 14 125 100 100 100 2.5 2.5 2.5 2.5 125 125 100 75 5 2 1 1 8 8.6 9.4 10.1 8.4 9.1 9.9 10.6 8 7.5 7 6.7 0.25 0.25 0.25 0.25 430 395 365 340 348b 349b 350b 351b 1smc5352 1smc5353 1smc5354 1smc5355 1smc5356 15 16 17 18 19 75 75 70 65 65 2.5 2.5 2.5 2. 5 3 75 75 75 75 75 1 1 0.5 0.5 0.5 10.8 11.5 12.2 13 13.7 11.5 12.2 12.9 13.7 14.4 6.3 6 5.8 5.5 5.3 0.25 0.3 0.35 0.4 0.4 315 295 280 265 250 352b 353b 354b 355b 356b 1smc5357 1smc5358 1smc5359 1smc5360 1smc5361 20 22 24 25 27 65 50 50 50 50 3 3.5 3.5 4 5 75 75 100 110 120 0.5 0.5 0.5 0.5 0.5 14.4 15.8 17.3 18 19.4 15.2 16.7 18.2 19 20.6 5.1 4.7 4.4 4.3 4.1 0.4 0.45 0.55 0.55 0.6 237 216 198 190 176 357b 358b 359b 360b 361b 1smc5362 1smc5363 1smc5364 1smc5365 1smc5366 28 30 33 36 39 50 40 40 30 30 6 8 10 11 14 130 140 150 160 170 0.5 0.5 0.5 0.5 0.5 20.1 21.6 23.8 25.9 28.1 21.2 22.8 25.1 27.4 29.7 3.9 3.7 3.5 3.3 3.1 0.6 0.6 0.6 0.65 0.65 170 158 144 132 122 362b 363b 364b 365b 366b 1smc5367 1SMC5368 1smc5369 1smc5370 1smc5371 43 47 51 56 60 30 25 25 20 20 20 25 27 35 40 190 210 230 280 350 0.5 0.5 0.5 0.5 0.5 31 33.8 36.7 40.3 43 32.7 35.8 38.8 42.6 45.5 2.8 2.7 2.5 2.3 2.2 0.7 0.8 0.9 1 1.2 110 100 93 86 79 367b 368b 369b 370b 371b 1smc5372 1smc5373 1smc5374 1smc5375 1smc5376 62 68 75 82 87 20 20 20 1 5 15 42 44 45 65 75 400 500 620 720 760 0.5 0.5 0.5 0.5 0.5 44.6 49 54 59 63 47.1 51.7 56 62.2 66 2.1 2 1.9 1.8 1.7 1.35 1.5 1.6 1.8 2 76 70 63 58 54.5 372b 373b 374b 375b 376b 1smc5377 1smc5378 1smc5379 1smc5380 1smc5381 91 100 110 120 130 15 12 12 10 10 75 90 125 170 190 760 800 1000 1150 1250 0.5 0.5 0.5 0.5 0.5 65.5 72 79.2 86.4 93.6 69.2 76 83.6 91.2 98.8 1.6 1.5 1.4 1.3 1.2 2.2 2.5 2.5 2.5 2.5 52.5 47.5 43 39.5 36.6 377b 378b 379b 380b 381b 1smc5382 1smc5383 1smc5384 1smc5385 1smc5386 1smc5387 140 1 50 160 170 180 190 8 8 8 8 5 5 230 330 350 380 430 450 1500 1500 1650 1750 1750 1850 0.5 0.5 0.5 0.5 0.5 0.5 101 108 115 122 130 137 106 114 122 129 137 144 1.2 1.1 1.1 1 1 0.9 2.5 3 3 3 4 5 34 31.6 29.4 28 26.4 25 382b 383b 384b 385b 386b 387b 1smc5388 2 00 5 480 1850 0.5 144 152 0.9 5 23.6 388b note: 1. tolerance and voltage designation - the jedec type numbers shown indicate a tolerance of 10% with guaranteed limits on only vz, i r , i r , and v f as shown in the electrical characteristics table. units with guaranteed limits on all seven parameters are indicated by suffix ?b? for 5% tolerance. 2. zener voltage (vz) and impedance (z zt & z zk ) - test conditions for zener voltage and impedance are as follows; iz is applied 40 10 ms prior to reading. mounting contacts are located from the inside edge of mounting clips to the body of the diode.(t a =25 ).
3. surge current (ir) - surge current is specified as the maximum allowable peak, non - recurrent square - wave cu rrent with a pulse width, pw, of 8.3 ms. the data given in figure 5 may be used to find the maximum surge current for a quare wave of any pulse width between 1 ms and 1000ms by plotting the applicable points on logarithmic paper. examples of this, using the 6.8v and 200v zeners, are shown in figure 6. mounting contact located as specified in note 3. (t a =25 ). 4. voltage regulation ( vz) - test conditions for voltage regulation are as follows: vz measurements are made at 10% and then at 50% of the iz max value listed in the electrical characteristics table. the test curre nts are the same for the 5% and 10% tolerance devices. the test current time druation for each vz measurement is 40 10 ms. (t a =25 ). mounting contact located as specified in note2. 5. maximum regulator current (i zm ) - the maximum current shown is based on the maximum voltage of a 5% type unit. therefore, it applies only to the b - suffix device. the actual i zm for any device may not exceed the value of 5 watts divided by the actual vz of the device. t l =75 at ma ximum from the device body. rating and characteristics curves 1smc5348 thru 1smc5388 temperature coefficients fig. 1 - power temperature derating curve fig. 2 - temperature coefficient range for units 6 to 220 volts fig. 3 - typical thermal response
fig. 4 - typical thermal resistance fig. 5 - maximum non - repetitive surge current v ersus nominal zener voltage( see note 3 ) rating and characteristics curves 1smc5348 thru 1smc5388 zener voltage versus zener current (figures 7,8, and 9) fig. 6 - peak surge current versus pulse fig. 7 - zener voltage versus zener current width(see note 3) v z =6.8 thru 10 volts fig. 8 - zener voltage versus zener current fig. 9 - zener voltage versus zener curren v z = 11 thru 75 volts v z = 82 thru 20 0 volts
application note: since the actual voltage available from a given zener diode is temperature dependent, it is necessary to determine junction temperature under any set of operating conditions in order to calculate its value. the following pr ocedure is recommended: lead temperature, t l , should be determined from: t l = la p d + t a la is the lead - to - ambient thermal resistance ( /w) and p d is the power dissipation. junction temperature, t j , may be found from: t j = t l + t jl t jl is the increase in junction temperature above the lead temperature and may be f ound from figure 3 for a train of power pulses or from figure 4 for dc power. t jl = jl p d for worst - case design, using expected limits of iz, limits of p d and the extremes of t j ( t j ) may be estimated. changes in voltage, vz, can then be found from: v = vz t j vz , the zener voltage temperature coefficient, is fount from figures 2. under high power - pulse operation, the zener voltage will vary with time and may also be affected significantly be the zener resistance. for best regulation, keep current e xcursions as low as possible. data of figure 3 should not be used to compute surge capability. surge limitations are given in figure 5. they are lower than would be expected by considering only junction temperature, as current crowding effects cause temper atures to be extremely high in small spots resulting in device degradation should the limits of figure. 5 be exceeded.
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