rev. d1 www.fairchildsemi.com zeners 1n4370a - 1n 4372a 1n746a - 1n759a electrical characteristics t a =25 c unless otherwise noted device v z (v) @ i z = 20ma (note 1) z z ( ? ) @ i z = 20ma i zm (ma) (note 2) i r ( a) @ v r = 1v min. typ. max. ta = 25 c ta = 125 c 1n4370a 1n4371a 1n4372a 1n746a 1n747a 2.28 2.57 2.85 3.14 3.42 2.4 2.7 3.0 3.3 3.6 2.52 2.84 3.15 3.47 3.78 30 30 29 28 24 150 135 120 110 100 100 75 50 10 10 200 150 100 30 30 1n748a 1n749a 1n750a 1n751a 1n752a 3.71 4.09 4.47 4.85 5.32 3.9 4.3 4.7 5.1 5.6 4.10 4.52 4.94 5.36 5.88 23 22 19 17 11 95 85 75 70 65 10 2 2 1 1 30 30 30 20 20 1n753a 1n754a 1n755a 1n756a 1n757a 5.89 6.46 7.13 7.79 8.65 6.2 6.8 7.5 8.2 9.1 6.51 7.14 7.88 8.61 9.56 7 5 6 8 10 60 55 50 45 40 0.1 0.1 0.1 0.1 0.1 20 20 20 20 20 1n758a 1n759a 9.50 11.40 10 12 10.5 12.6 17 30 35 30 0.1 0.1 20 20 v f forward voltage = 1.5v max @ i f = 200ma notes: 1. zener voltage (v z ) the zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (t l ) at 30 c 1 c and 3/8? lead length. 2. maximum zener current ratings (i zm ) the maximum current handling capability on a worst case basis is limited by the actual zener voltage at the operation point and the power derating curve. zeners 1n4370a - 1n4372a 1n746a - 1n759a absolute maximum ratings * t a = 25 c unless otherwise noted * these ratings are limiting values above which the serviceability of the diode may be impaired. symbol parameter value units p d power dissipation @ tl 75 c, lead length = 3/8? 500 mw derate above 75 c4.0mw/ c t j , t stg operating and storage temperature range -65 to +200 c tolerance = 5% do-35 glass case color band denotes cathode
rev. d1 www.fairchildsemi.com zeners 1n4370a - 1n 4372a 1n746a - 1n759a top mark information device line 1 line 2 line 3 1n4370a 1n4371a 1n4372a 1n746a 1n747a logo logo logo logo logo 37 37 37 46 47 0a 1a 2a a a 1n748a 1n749a 1n750a 1n751a 1n752a logo logo logo logo logo 48 49 50 51 52 a a a a a 1n753a 1n754a 1n755a 1n756a 1n757a logo logo logo logo logo 53 54 55 56 57 a a a a a 1n758a 1n759a logo logo 58 59 a a
rev. d1 www.fairchildsemi.com zeners 1n4370a - 1n 4372a 1n746a - 1n759a top mark information (continued) f 50 a 1 st line: f - fairchild logo 2 nd line: device name - 4 th to 5 th characters of the device name. or 5 th to 6 th characters for bzxyy series 3 rd line: device name - 6 th to 7 th characters of the device name. or voltage rating for bzxyy series general requirements: 1.0 cathode band 2.0 first line: f - fairchild logo 3.0 second line: device name - for 1nxx series: 4 th to 5th characters of the device name. for bzxx series: 5 th to 6 th characters of the device name. 4.0 third line: device name - for 1nxx series: 6 th to 7 th characters of the device name. for bzxyy series: voltage rating 5.0 maximum no. of marking lines: 3 6.0 maximum no. of digits per line: 2 7.0 fsc logo must be 20 % taller than the alphanumeric mark ing and should occupy the 2 char acters of the specified line. 8.0 marking font: arial (except fsc logo) 9.0 first character of each marki ng line must be aligned vertically.
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