1n957 thru 1n978 0.5w silicon planar zener diodes ? zener voltage 6.8v to 51v ? silicon planar power zener diodes ? standards zener voltage tolerance is 20%, add suffix ?a? for 10% tolerance and suffix ?b? for 5% tolerance, non standards and higher zener voltage upon request
symbol value units zener current see table 1 power dissipation @ t a =25 o c p tot 500 mw junction temperature t j 175 o c storage temperature range t stg -65 to 175 o c (ohfwulfd o &kdudfwhulvwlf v # & 8qohv v 2wkhuzlv h 6shflilhg symbol maximum unit thermal resistance r -$ 300 o c/w forward voltage @ i f =200ma v f 1.5 v note: valid provided that a distance of 8mm from case are kept at ambient temperature
? case: do-35 glass case ? polarity: color band denotes cathode end ? weight: approx. 0.13 gram
om p on ent s 21 20 1 i t a sc a s t ree t ch at s w or th ! " # $
% ! " # mcc www. mccsemi .com a b c d d cathode mark dimensions inches mm dim min max min max note a --- .166 --- 4.2 b --- .079 --- 2.00 c --- .020 --- .52 d 1.000 --- 25.40 --- do-35
zener voltage 3) @test current maximum zener impedance 1) maximum reverse leakage current test-voltage maximum zener current v z i zt z zt z zk i zk i r 2) suffix a suffix b i zm 2) typical temp. coefficient mcc part number v ma
ma a v v ma %/ : 1n957 6.8 18.5 4.5 700 1.0 150 4.9 5.2 47 0.050 1n958 7.5 16.5 5.5 700 0.5 75 5.4 5.7 42 0.058 1n959 8.2 15 5.5 700 0.5 50 5.9 6.2 38 0.062 1n960 9.1 14 5.5 700 0.5 10 6.6 6.9 35 0.068 1n961 10 12.5 5.5 700 0.25 5 7.2 7.6 32 0.075 1n962 11 11.5 5 700 0.25 5 8.0 8.4 28 0.076 1n963 12 10.5 11.5 700 0.25 5 8.6 9.1 26 0.077 1n964 13 9.5 13 700 0.25 5 9.4 9.9 24 0.079 1n965 15 8.5 16 700 0.25 5 10.8 11.4 21 0.082 1n966 16 7.8 17 700 0.25 5 11.5 12.2 19 0.083 1n967 18 7.0 21 750 0.25 5 13.0 13.7 17 0.085 1n968 20 6.2 25 750 0.25 5 14.4 15.2 15 0.086 1n969 22 5.6 29 750 0.25 5 15.8 16.7 14 0.087 1n970 24 5.2 33 750 0.25 5 17.3 18.2 14 0.088 1n971 27 4.6 41 750 0.25 5 19.4 20.6 11 0.090 1n972 30 4.2 49 1000 0.25 5 21.6 22.8 10 0.091 1N973 33 3.8 58 1000 0.25 5 23.8 25.1 9.0 0.092 1n974 36 3.4 70 1000 0.25 5 25.9 27.4 8.5 0.093 1n975 39 3.2 80 1000 0.25 5 28.1 29.7 7.8 0.094 1n976 43 3.0 93 1500 0.25 5 31.0 32.7 7.0 0.095 1n977 47 2.7 105 1500 0.25 5 33.8 35.8 6.4 0.095 1n978 51 2.5 125 1500 0.25 5 36.7 38.8 5.9 0.096 note: 1) the zener impedance is derived from the 1khz ac voltage which results when an ac current having an rms value equal to 10% of the zener current (i zt ) is superimposed on i zt zener impedance is measured at two points to insure a sharp knee on the breakdown curve and to eliminate unstable units. 2) valid provided that leads are kept at ambient temperature at a distance of 8mm from case. 3) measured with device junction in thermal equilibrium. www. mccsemi .com mcc 1n957 thru 1n978
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