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| umz6.8n diodes zener diode umz6.8n ! applications constant voltage control for the esd measure of a signal line ! features 1) small surface mounting type (umd3) 2) composite type with two cathode common elements 3) high reliability ! ! ! ! construction silicon epitaxial planar ! ! ! ! external dimensions (units : mm) 6 c 2.10.1 1.250.1 0.1min. 0~0.1 0.150.05 0.30.1 2.00.2 1.30.1 0.65 0.65 0.90.1 0.3 0.6 each lead has same dimensions rohm : umd3 eiaj : sc-70 jedec : sot-323 ! ! ! ! absolute maximum ratings (ta=25 c) ! ! ! ! equivalent circuit parameter symbol limits unit power dissipation ? 200 mw junction temperature 150 c storage temperature c tj tstg ? 55~ + 150 p ? total of 2 elements ! ! ! ! electrical characteristics (ta=25 c) parameter symbol min. typ. max. unit conditions zener voltage v z 6.47 7.14 v i z =5ma reverse current i r ?? 0.5 v r =3.5v operating resistance z z ?? 40 ? i z =5ma a ? capacitance between terminals c t ? ? 9 f=1mh z , v r =5v pf ! ! ! ! others parameter iec61000-4-2 device configuration judgment contents : 150pf charge / discharge capacitance : 330 ? discharge resistance 10 repetitions no malfunction : 8kv contact : 15kv suspended
umz6.8n diodes ! ! ! ! electrical characteristic curves (ta=25 c) 5 678 1 10 100 1m 10m 100n zener current : iz (a) zener voltage : vz (v) fig.1 zener voltage characteristic ? 25 c 25 c 75 c 125 c 0.01 0.1 1 10 10 1 100 dynamic impeadance : zz ( ? ) zener current : iz (ma) fig.2 operating resistance zener current characteristic 0 0 25 50 100 150 100 200 300 power dissipation : pd (mw) ambient temperature : ta ( c) fig.3 derating curve |
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