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ZM 4728...ZM 4764 SILICON PLANAR POWER ZENER DIODES
for use in stabilizing and clipping circuits with high power rating. Standard Zener voltage tolerance is 10%. Add suffix "A" for 5% tolerance and suffix "B" for 2% tolerance. Other tolerances available are upon request. LL-41
These diodes are also available in DO-41 case with the type designation 1N4728...1N4764 .
Absolute Maximum Ratings (Ta = 25oC)
Symbol Zener Current see Table "Characteristics" Power Dissipation Junction Temperature Storage Temperature Range
1)
Value
1)
Unit
Ptot Tj TS
1
W
O O
175 -65 to +175
C C
Valid provided that electrodes are kept at ambient temperature.
Characteristics at Tamb = 25oC
Symbol Thermal Resistance Junction to Ambient Air Forward Voltage at IF = 200mA
1)
Min. -
Typ. -
Max. 1701) 1.2
Unit K/W V
RthA VF
Valid provided that electrodes are kept at ambient temperature.
ZM 4728...ZM 4764
Nominal Zener voltage3) TYPE at IZT Vz V
ZM4728 ZM4729 ZM4730 ZM4731 ZM4732 ZM4733 ZM4734 ZM4735 ZM4736 ZM4737 ZM4738 ZM4739 ZM4740 ZM4741 ZM4742 ZM4743 ZM4744 ZM4745 ZM4746 ZM4747 ZM4748 ZM4749 ZM4750 ZM4751 ZM4752 ZM4753 ZM4754 ZM4755 ZM4756 ZM4757 ZM4758 ZM4759 ZM4760 ZM4761 ZM4762 ZM4763 ZM4764 3.3 3.6 3.9 4.3 4.7 5.1 5.6 6.2 6.8 7.5 8.2 9.1 10 11 12 13 15 16 18 20 22 24 27 30 33 36 39 43 47 51 56 62 68 75 82 91 100
Test current
Maximum Zener Impedance1)
Maximum reverse leakage current
Surge current
Maximum regulator current2)
IZTmA
76 69 64 58 53 49 45 41 37 34 31 28 25 23 21 19 17 15.5 14 12.5 11.5 10.5 9.5 8.5 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.7 3.3 3.0 2.8 2.5
at IZT Vz
10 10 9 9 8 7 5 2 3.5 4.0 4.5 5.0 7 8 9 10 14 16 20 22 23 25 35 40 45 50 60 70 80 95 110 125 150 175 200 250 350
Vzk
400 400 400 400 500 550 600 700 700 700 700 700 700 700 700 700 700 700 750 750 750 750 750 1000 1000 1000 1000 1500 1500 1500 2000 2000 2000 2000 3000 3000 3000
at IZKmA
1 1 1 1 1 1 1 1 1 0.5 0.5 0.5 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25
IR A
150 100 100 50 10 10 10 10 10 10 10 10 10 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
at VR V
1 1 1 1 1 1 2 3 4 5 6 7 7.6 8.4 9.1 9.9 11.4 12.2 13.7 15.2 16.7 18.2 20.6 22.8 25.1 27.4 29.7 32.7 35.8 38.8 42.6 47.1 51.7 56.0 62.2 69.2 76
at TA = 25oC IR mA
1375 1260 1190 1070 970 890 810 730 660 605 550 500 454 414 380 344 304 285 250 225 205 190 170 150 135 125 115 110 95 90 80 70 65 60 55 50 45
IZMmA
275 252 234 217 193 178 162 146 133 121 110 100 91 83 76 69 61 57 50 45 41 38 34 30 27 25 23 22 19 18 16 14 13 12 11 10 9
1) The Zener Impedance is derived from the 60 Hz AC voltage which results when an AC current having an RMS value equal to 10% of the Zener current (IZT or IZK ) is superimposed on IZT or IZK . 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 electrodes are kept at ambient temperature. 3) Measured under thermal equilibrium and DC test conditions.
4) Tested with pulses tp = 20 ms.
ZM 4728...ZM 4764
Admissible power dissipation versus ambient temperature
Valid provided that electrodes are kept at ambient temperature
W 1.0
ZM4728...
Ptot
0.8
0.6
0.4
0.2
0
0
100
200 C
Tamb
o

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