t4 - lds - 0232 - 1, rev . 1 (11 1957 ) ?2011 microsemi corporation page 1 of 6 1n5221bur-1 thru 1n5281bur-1 available on commercial versions metallurgically bonded glass surface mount 500 mw zeners screening in reference to mil - prf - 19500 available description the 1n5221bur - 1 thru 1 n5281bur - 1 series of 0.5 watt zener v oltage r egulators provides a surface mount equivalent to the popular jedec registered 1n5221 to 1n5281 series for 2.4 to 200 volts in a metallurgically bonded configuration. they are available with standard 5% or 10% t olerances as well as tighter tolerances identified by different suffix letters on t he part number . microsemi also offers numerous other zener products to meet higher and lower power applications. do - 213aa package also available in : do - 35 (do - 204ah) ( axial - leaded ) 1n5221 b-1 thru 1n5281b -1 important: for the latest information, visit our website http://www.microsemi.com . features ? su rface mount equivalent of jedec registered 1n5 221 thru 1n5 281 series . ? voltage tolerances of 10%, 5%, 2%, and 1% available . ? hermetically sealed surface mount package. ? internal metallurgical bond . ? up - screen ing in reference to mil - prf - 19500 is available. (se e part nomenclature for all available options .) ? rohs compliant versions available (commercial grade only) . applications / benefits ? regulates voltage over a broad operating current and temperature range . ? extensive selection from 2.4 to 200 v . ? non - sensitive t o esd (mil -std- 750 m ethod 1020). ? minimal capacitance (see figure 3 ). ? inherently radiation hard per microsemi micronote 050 . maximum ratings msc C law rence 6 lake street, lawrence, ma 01841 tel: 1- 800 - 446 - 1158 or (978) 620 - 2600 fax: (978) 689 - 0803 msc C ireland gort road business park, ennis, co. clare, ireland tel: +353 (0) 65 6840044 fax: +353 (0) 65 6822298 website: www.microsemi.com parameters/test conditions symbol value unit junction and storage temp erature t j and t stg - 65 to +175 o c thermal resi s tance junction - to - ambient (1) r ? ja 250 o c /w thermal resistance junction - to - end cap r ? jec 100 o c /w steady - state power dissipation (2) p d 0.5 w for w ard voltage @ 200 ma v f 1. 1 v solder temperature @ 10 s t sp 260 o c notes : 1. when mounted on fr4 pc board (1 oz cu) with recommended footprint (see last page). 2. at end cap temperature t ec < 125 o c or ambient temperature t a < 50 o c when mounted on fr4 pc board as described for thermal resistance above (see figure 2 for derating) . downloaded from: http:///
t4 - lds - 0232 - 1, rev . 1 (11 1957 ) ?2011 microsemi corporation page 2 of 6 1n5221bur-1 thru 1n5281bur-1 mechanical and pa ckaging ? case: hermetically sealed glass do - 213aa (sod80 or mll34) melf style package . ? terminals: end caps t in -l ead or rohs c ompliant annealed matte -t in plating (commercial grade only) solderable per mil - std - 750, method 2026 . ? marking: cathode band only . ? polarity: cathode indicated by band where diode is to be operated with the banded end positive with respect to the opposit e end for zener regulation . ? tape & reel option: standard per eia - 481 -b (add tr suffix to part number). consult factory for quant ities. ? weight: 0. 04 grams . ? see p ackage d imensions on last page. part nomenclature mq 1n5 221 b ur -1 (e3) reliability level mq (reference jan) mx (reference jantx) mv (reference jantxv) msp (reference jans) blank = commercial jedec type number (s ee e lectrical characteristic s t able ) zener voltage tolerance a = 10% b = 5% c = 2% d = 1% rohs compliance e3 = rohs compliant ( available on commercial grade on ly ) blank = non - rohs compliant metallurgical ly bond ed surface mount package symbols & definitions symbol definition i r reverse current: the maximum reverse (leakage) current that will flow at the specified vol tage and temperature. i z , i zt , i zk re gulator current: the dc regulator current (i z ), at a specified test point (i zt ), near breakdown knee (i zk ). i zm maximum regulator (zener) current: the maximum rated dc current for the specified power rat ing. t sp temperature solder pad: the maximum s older temperature that can be safely applied to the terminal. v r reverse voltage: the reverse voltage dc value, no alternating component. v z zener voltage: the z ener voltage the device will exhibit at a specified current (i z ) in its breakdown region. z zt or z zk dynamic impedance: the small signal impedance of the diode when biased to operate in its break down region at a specified rms current modulation (typically 10% of i zt or i zk ) and superimposed on i zt or i zk respectively. downloaded from: http:///
t4 - lds - 0232 - 1, rev . 1 (11 1957 ) ?2011 microsemi corporation page 3 of 6 1n5221bur-1 thru 1n5281bur-1 electrical character istics @ 25 o c unless otherwise noted.* industry part number ( note s 1 & 4) nominal zener voltage v z @ i zt (note 2) volts test current i zt ma max zener impedance max reverse leakage current max zener voltage temp. coeff. ( note 3 ) vz (% / o c) z zt @ i zt ohms z zk @ i zk = 0.25 ma ohms i r @ v r a volts a b,c & d 1n5221 b ur -1 1n5222 b ur -1 1n5223 b ur -1 1n5224 b ur -1 1n5225 b ur -1 2.4 2.5 2.7 2.8 3.0 20 20 20 20 20 30 30 30 30 29 1200 1250 1300 1400 1600 100 100 75 75 50 0.95 0.95 0.95 0.95 0.95 1.0 1.0 1.0 1.0 1.0 - 0.085 - 0.085 - 0.080 - 0.080 - 0.075 1n5226 b ur -1 1n5227 b ur -1 1n5228 b ur -1 1n5229 b ur -1 1n5230 b ur -1 3.3 3.6 3.9 4.3 4.7 20 20 20 20 20 28 24 23 22 19 1600 1700 1900 2000 1900 25 15 10 5.0 50 0.95 0.95 0.95 0.95 1.9 1.0 1.0 1.0 1.0 2.0 - 0.070 - 0.065 - 0.060 +/ - 0.055 +/ - 0.030 1n5231 b ur -1 1n5232 b ur -1 1n5233 b ur -1 1n5234 b ur -1 1n5235 b ur -1 5.1 5.6 6.0 6.2 6.8 20 20 20 20 20 17 11 7.0 7.0 5.0 1600 1600 1600 1000 750 5.0 5.0 5.0 5.0 3.0 1.9 2.9 3.3 3.8 4.8 2.0 3.0 3.5 4.0 5.0 +/ - 0.030 +0.03 8 +0.038 +0.045 +0.050 1n5236 b ur -1 1n5237 b ur -1 1n5238 b ur -1 1n5239 b ur -1 1n5240 b ur -1 7.5 8.2 8.7 9.1 10 20 20 20 20 20 6.0 8.0 8.0 10 17 500 500 600 600 600 3.0 3.0 3.0 3.0 3.0 5.7 6.2 6.2 6.7 7.6 6.0 6.5 6.5 7.0 8.0 +0.058 +0.062 +0.065 +0.068 +0.075 1n5241 b ur -1 1n5242 b ur -1 1n5243 b ur -1 1n5244 b ur -1 1n5245 b ur -1 11 12 13 14 15 20 20 9.5 9.0 8.5 22 30 13 15 16 600 600 600 600 600 2.0 1.0 0.5 0.1 0.1 8.0 8.7 9.4 9.5 10.5 8.4 9.1 9.9 10 11 +0.076 +0.077 +0.079 +0.082 +0.082 1n5246 b ur -1 1n5247 b ur -1 1n5248 b ur -1 1 n5249 b ur -1 1n5250 b ur -1 16 17 18 19 20 7.8 7.4 7.0 6.6 6.2 17 19 21 23 25 600 600 600 600 600 0.1 0.1 0.1 0.1 0.1 11.4 12.4 13.3 13.3 14.3 12 13 14 14 15 +0.083 +0.084 +0.085 +0.086 +0.086 1n5251 b ur -1 1n5252 b ur -1 1n5253 b ur -1 1n5254 b ur -1 1n5255 b ur -1 22 24 25 27 28 5.6 5.2 5.0 4.6 4.5 29 33 35 41 44 600 600 600 600 600 0.1 0.1 0.1 0.1 0.1 16.2 17.1 18.1 20 20 17 18 19 21 21 +0.087 +0.088 +0.089 +0.090 +0.091 1n5256 b ur -1 1n5257 b ur -1 1n5258 b ur -1 1n5259 b ur -1 1n5260 b ur -1 30 33 36 39 43 4.2 3.8 3.4 3.2 3.0 49 58 70 80 93 600 700 700 800 900 0.1 0.1 0.1 0.1 0.1 22 24 26 29 31 23 25 27 30 33 +0.091 +0.092 +0.093 +0.094 +0.095 1n5261 b ur -1 1n5262 b ur -1 1n5263 b ur -1 1n5264 b ur -1 1n5265 b ur -1 47 51 56 60 62 2.7 2.5 2.2 2.1 2.0 105 125 150 170 185 1000 1100 1300 1400 1400 0 .1 0.1 0.1 0.1 0.1 34 37 41 44 45 36 39 43 46 47 +0.095 +0.096 +0.096 +0.097 +0.097 1n5266 b ur -1 1n5267 b ur -1 1n5268 b ur -1 1n5269 b ur -1 1n5270 b ur -1 68 75 82 87 91 1.8 1.7 1.5 1.4 1.4 230 270 330 370 400 1600 1700 2000 2200 2300 0.1 0.1 0.1 0.1 0.1 49 53 59 65 66 52 56 62 68 69 +0.097 +0.098 +0.098 +0.099 +0.099 1n5271 b ur -1 1n5272 b ur -1 1n5273 b ur -1 1n5274 b ur -1 1n5275 b ur -1 100 110 120 130 140 1.3 1.1 1.0 0.95 0.90 500 750 900 1100 1300 2600 3000 4000 4500 4500 0.1 0.1 0.1 0.1 0.1 72 80 86 94 101 76 84 91 99 106 +0.110 +0.110 +0.110 +0.110 +0.110 1n5276 b ur -1 1n5277 b ur -1 1n5278 b ur -1 1n5279 b ur -1 1n5280 b ur -1 1n5281 b ur -1 150 160 170 180 190 200 0.85 0.80 0.74 0.68 0.66 0.65 1500 1700 1900 2200 2400 2500 5000 5500 5500 6000 6500 7000 0.1 0.1 0.1 0.1 0.1 0.1 108 116 12 3 130 137 144 114 122 129 137 144 152 +0.110 +0.110 +0.110 +0.110 +0.110 +0.110 * t a = + 25 o c unless otherwise noted. based on dc measurements at thermal equilibrium; case t emperature maintained at 30 +/ - 2 o c . v f = 1.1 v max @ i f = 200 ma for all types. see further n otes on following page. downloaded from: http:///
t4 - lds - 0232 - 1, rev . 1 (11 1957 ) ?2011 microsemi corporation page 4 of 6 1n5221bur-1 thru 1n5281bur-1 note 1: table as shown lists type numbers, which indicate a tolerance of +/ - 5 %. devices with guaranteed limits on all six parameters are indicated by suffix a for +/ - 10%, b for +/ - 5%, c for +/ - 2%, an d d for +/ - 1% tolerance. note 2: the electrical characteristics are measured after allowing the device to stabilize for 20 s econds. note 3: temperature coefficient ( vz ). test conditions for temperature coefficient are as follows: a. i zt = 20 ma, t 1 = 25 o c, t 2 = 125 o c (1n5221aur - 1 & bur - 1 thru 1n5242aur - 1 & bur - 1) b. i zt = rated i zt , t 1 = 25 o c, t 2 = 125 o c (1n5243aur - 1 & bur - 1 thru 1n5281aur - 1 & bur - 1) device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient temperature. downloaded from: http:///
t4 - lds - 0232 - 1, rev . 1 (11 1957 ) ?2011 microsemi corporation page 5 of 6 1n5221bur-1 thru 1n5281bur-1 graphs t ec end cap temperature (oc), or n ominal z ener v oltage (v olts ) t a ambient temperature on fr4 pc b oard figure 2 figure 1 zener voltage temperature power derating curve coefficient vs. zener voltage z ener v oltage v z figure 3 capacitance vs. zener voltage (typical) t ec t a t ypical c apacitance in p icofarads (pf) pd, rated power dissipation (mw) t emperature c oefifcient %/ o c t emperature co efficient mv/ o c downloaded from: http:///
t4 - lds - 0232 - 1, rev . 1 (11 1957 ) ?2011 microsemi corporation page 6 of 6 1n5221bur-1 thru 1n5281bur-1 package dimensions pad layout dim inches millimeters min max min max a 0.063 0.067 1.60 1.70 b 0.130 0.146 3.30 3.70 c 0.016 0.022 0.41 0.55 inches mm a .200 5.08 b .055 1.40 c .080 2.03 downloaded from: http:///
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