t4 - lds - 0232, rev . 1 (11 1957 ) ?2011 microsemi corporation page 1 of 5 1n5221 b-1 thru 1n5281b -1 available on commercial versions 500 mw glass axial - lead zener diodes screening in reference to mil - prf - 19500 available description the popular 1n5221 b-1 thru 1n5281b -1 seri es of 0.5 watt zener v oltage r egulators provides a selection from 2.4 to 200 volts in standard 5% or 10% tolerances as well as tighter t olerances identified by different suffix letters on the part number . these glass , axial - leaded do - 35 zeners are also available in various up - screening levels by adding a prefix identifier as described in the part nomenclature section of this datasheet. microsemi also offers numerous other zener products to meet higher and lower power applications. do - 35 (do - 204ah) packa ge also available in : do - 213aa melf (surface mount) 1n5221 b ur - 1 thru 1n5281bur -1 important: for the latest information, visit our website http://www.microsemi.com . features ? jedec registered 1n5 221 thru 1n5 281 series . ? voltage tolerances of 10%, 5%, 2%, and 1% available . ? internal metallurgical bond . ? up - screening in reference to mil - prf - 19500 is available. (see 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 . ? flexible axial - lead mounting terminals . ? non - sensitive t o esd (mil - s td - 750 m ethod 1020). ? minimal capacitance (see figure 2 ). ? inherently radiation hard per microsemi micronote 050 . m axim um 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 resistance junction - to - lead (1) r ? jl 250 o c /w thermal resistance junction - to - ambient (2) r ? ja 310 o c /w steady - state power dissipation (3) p d 0.5 w for w ard voltage @ 200 ma v f 1.5 v solder temperature @ 10 s t sp 260 o c notes : 1. at 3/8 (10 mm) lead length from body. 2. w hen mou nted on fr4 pc board (1 oz cu) with 4 mm 2 copper pads and track width 1 mm, length 25 mm. 3. at t l < 50 o c 3/8 inch (10 mm) from body or 0.48 w at t a < 25 o c when mounted on fr4 pc board as described for thermal resistance above (also see figure1 ). downloaded from: http:///
t4 - lds - 0232, rev . 1 (11 1957 ) ?2011 microsemi corporation page 2 of 5 1n5221 b-1 thru 1n5281b -1 mechanical and packaging ? case: hermetically sealed axial - lead glass do - 35 (do - 204ah) package . ? terminal s: tin -l ead or rohs c ompliant annealed matte -t in plating (commercial grade only) solderable per mil - std - 750, method 2026. ? m arking: part number. ? polarity: cathode indicated by band. diode to be operated with the banded end positive with respect to the opposite end for zener regulation. ? tape & reel option: standard per eia - 296 (add tr suffix to part number). consult facto ry for quantities. ? w eight: 0.2 grams . ? see p ackage d imensions on last page. part nomenclature mq 1n5 221 b -1 (e3) reliability level mq (reference jan) mx (reference jantx) mv (reference jantxv) msp (referenc e 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 only ) blank = non - rohs compliant metallurgical ly bond ed symbols & definitions symbol definition i r reverse current: the maximum reverse (leakage) current that will flow at the specified volt age and temperature. i z , i zt , i zk regulator 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 rati ng. t sp temperature solder pad: the maximum solder 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 dyna mic impedance: the small signal impedance of the diode when biased to operate in its breakdown 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, rev . 1 (11 1957 ) ?2011 microsemi corporation page 3 of 5 1n5221 b-1 thru 1n5281b -1 electrical characteristics @ 25 o c u nless otherwise noted. * jedec type no. ( note 1 ) nominal zener voltage v z @ i zt volts test current i zt ma max zener impedance ( note 2 ) 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-1 1n5222 b-1 1n5223 b-1 1n5224 b-1 1n5225 b-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-1 1n5227 b-1 1n5228 b-1 1n5229 b-1 1n5230 b-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-1 1n5232 b-1 1n5233 b-1 1n5234 b-1 1n5235 b-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 +0.038 +0.038 +0.045 +0.050 1n5236 b-1 1n5237 b-1 1n5238 b-1 1n5 239 b-1 1n5240 b-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-1 1n5242 b-1 1n5243 b-1 1n5244 b-1 1n5245 b-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-1 1n5247 b-1 1n5248 b-1 1n5249 b-1 1n5250 b-1 16 17 18 19 20 7.8 7.4 7.0 6.6 6.2 17 19 21 23 25 600 600 600 60 0 600 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-1 1n5252 b-1 1n5253 b-1 1n5254 b-1 1n5255 b-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-1 1n5257 b-1 1n5258 b-1 1n5259 b-1 1n5260 b-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-1 1n5262 b-1 1n5263 b-1 1n5264 b-1 1n5265 b-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-1 1n5267 b-1 1n5268 b-1 1n5269 b-1 1n5270 b-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-1 1n5272 b-1 1n5273 b-1 1n5274 b-1 1n5275 b-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-1 1n5277 b-1 1n5278 b-1 1n5279 b-1 1n5280 b-1 1n5281 b-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 0.1 108 116 123 130 137 144 114 122 129 137 144 152 +0.110 +0.110 +0.110 +0.110 +0.110 +0.110 *jedec registered data. jedec type numbers listed indicate a tolerance of +/ - 5 %. devices with g uaranteed limits on all six parameters are indicated by suffix a for +/ - 10% tolerance and suffix b for +/ - 5% tolerance. also available with suffix c or d which indicates 2% and 1% tolerance respectively. downloaded from: http:///
t4 - lds - 0232, rev . 1 (11 1957 ) ?2011 microsemi corporation page 4 of 5 1n5221 b-1 thru 1n5281b -1 notes: 1. the electri cal characteristics are measured after allowing the device to stabilize for 20 seco nds when mounted with a 3/8 (10 mm) minim um lead length from the case. 2. the z ener impedance is derived from the 60 hz ac voltage that results when an ac c urrent having an r ms value equal to 10% of the dc z ener current (i zt or i zk ) is superimposed on i zt or i zk . zener impedance is measured at two points to ensure a sharp knee on the breakdow n curve, thereby eliminating unstable units. also see micronote 202 for variation in dynamic impedance with different operating currents. 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 (1n5221a, b thru 1n5242a, b). b. i zt = rated i zt , t 1 = 25 o c , t 2 = 125 o c (1n5243a, b thru 1n5281a, b). (device to be temperature stabilized with current applied prior to reading bre akdown voltage at the specified ambient temp.) graphs t l lead temperature at 3/8 from z ener voltage v z body or t a on fr4 pc board figure 1 figure 2 power derating curve capacitance vs. zener voltage (typical) pd, rated power dissipation (mw) t ypical capacitance in pico farads (pf) downloaded from: http:///
t4 - lds - 0232, rev . 1 (11 1957 ) ?2011 microsemi corporation page 5 of 5 1n5221 b-1 thru 1n5281b -1 package dimensions ltr d imensions n otes inch m ill imeters min max min max bd .055 .090 1.40 2.29 3 bl .120 .200 3.05 5.08 3 ld .018 .022 0.46 0.56 ll 1.000 1.500 25.40 38.10 ll 1 .050 1.27 4 no t es: 1 . d imension s ar e in inch. 2 . m illimeter s ar e gi ven fo r genera l informatio n onl y. 3 . packa ge contou r optiona l w ithi n b d an d lengt h bl . h ea t slugs , if an y , shal l be include d w ithi n thi s cy linde r bu t shal l no t be subjec t to minimum limi t of b d. the bl dimensio n shal l includ e th e entir e bod y including slugs. 4 . w ithi n thi s z on e lead , diamete r may v ar y to allo w fo r lea d finishe s and irregularitie s othe r tha n hea t slugs. 5 . in accordanc e w it h as me y 14.5 m, diameter s ar e equi v alen t to x sy mbolog y. downloaded from: http:///
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