6 lake street, lawrence, massachusetts 01841 phone (978) 620-2600 fax (978) 689-0803 website: http://www.microsemi.com 109 figure 1 design data case: do-213ab , hermetically sealed glass case. (melf, ll41) lead finish: tin / lead thermal resistance: ( r o jec ): 50 c/w maximum at l = 0 inch thermal impedance: ( zo jx ): 15 c/w maximum polarity: diode to be operated with the banded (cathode) end positive. mounting position: any. mounting surface selection: the axial coefficient of expansion (coe) of this device is approximately +6ppm/c. the coe of the mounting surface system should be selected to provide a suitable match with this device. millimeters inches dim min max min max d 2.39 2.66 .094 .105 f 0.41 0.55 .016 .022 g 4.80 5.20 .189 .205 g1 4.11 ref. .159 ref. s 0.03 min. .001 min. electrical characteristics @ 25c cdi nominal zener max. dc type zener test maximum zener impedance zener max. reverse number voltage current current leakage current v z @1 zt 1 zt z zt @ 1 zt z zk @ 1 zk=1ma 1 zm l r @ v r (note 1) (note 3) (note 2) volts ma ohms ohms ma a volts cdll3821 3.3 76 10 400 276 100 1 cdll3821a 3.3 76 10 400 276 100 1 cdll3822 3.6 69 10 400 252 75 1 cdll3822a 3.6 69 10 400 252 75 1 cdll3823 3.9 64 9 400 238 25 1 cdll3823a 3.9 64 9 400 238 25 1 cdll3824 4.3 58 9 400 213 5 1 cdll3824a 4.3 58 9 400 213 5 1 cdll3825 4.7 53 8 500 194 5 1 cdll3825a 4.7 53 8 500 194 5 1 cdll3826 5.1 49 7 550 178 3 1 cdll3826a 5.1 49 7 550 178 3 1 cdll3827 5.6 45 5 600 162 3 2 cdll3827a 5.6 45 5 600 162 3 2 cdll3828 6.2 41 2 700 146 3 3 cdll3828a 6.2 41 2 700 146 3 3 maximum ratings operating temperature: -65c to +175c storage temperature: -65c to +175c dc power dissipation: 1 watt @ +t ec = 125c power derating: 20 mw / c above t ec = 125c forward voltage @ 200ma = 1.2 volts maximum note 1 no suffix = + 10% tolerance on nominal zener voltage, suffix ?a? signifies + 5%, "c" suffix signifies + 2% and "d" suffix signifies + 1%. note 2 zener impedance is derived by superimposing on 1 zt a 60hz rms a.c. current equal to 10% of 1 zt. note 3 zener voltage is measured with the device junction in thermal equilibrium at an ambient temperature of 25c + 3c. ? 1n3821aur-1 thru 1n3828aur-1 available in jan, jantx and jan- txv per mil-prf-19500/115 ? leadless package for surface mount ? double plug construction 1n3821aur-1 thru 1n3828aur-1 and cdll3821 thru cdll 3828a
110 1n3821aur-1 thru 1n3828aur-1 and cdll3821a thru cdll3828a 1000 100 10 1 z zt , zener impedance (ohms) .1 1.0 10 100 operating current l zt (ma) figure 3 zener impedance vs. operating current 0 25 50 75 100 125 150 175 t ec , end cap temperature (c) power derating curve 1000 800 600 400 200 0 pd, rated power dissipation (mw) figure 2
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