FEATURES
♦ Silicon Planar Power Zener Diodes
♦ For use in stabilizing and clipping circuits with high
power rating.
♦ Standard Zener voltage tolerance is ±10%. Add suf-
fix “A” for ±5% tolerance. Other Zener voltages and
tolerances are available upon request.
♦ These diodes are also available in DO-41 case with the type
designation 1N4728 … 1N4764.
MECHANICAL DATA
Case: MELF Glass Case
Weight: approx. 0.25 g
MAXIMUM RATINGS
Ratings at 25°C ambient temperature unless otherwise specified.
ZM4728 THRU ZM4764
ZENER DIODES
.022 (0.55)
.205 (5.2)
.102 (2.6)
Cathode Mark
.189 (4.8)
.094 (2.4)
MELF
Dimensions are in inches and (millimeters)
Characteristics at Tamb = 25 °C
SYMBOL MIN. TYP. MAX. UNIT
Thermal Resistance
R
thJA
– – 170
(1)
°C/W
Junction to Ambient Air
Forward Voltage
V
F
– – 1.2 Volts
at IF= 200 mA
NOTES:
(1) Valid provided that electrodes are kept at ambient temperature
SYMBOL VALUE UNIT
Zener Current (see Table “Characteristics”)
Power Dissipation at T
amb
= 25°C P
tot
1.0
(1)
Watts
Junction Temperature T
j
150 °C
Storage Temperature Range T
S
– 65 to +150 °C
12/16/98
ZM4728 THRU ZM4764
ELECTRICAL CHARACTERISTICS
Ratings at 25°C ambient temperature unless otherwise specified.
Type
Nominal
Zener
voltage
(3)
at
I
ZT
VZ(V)
Test
current
IZT(mA)
Maximum Zener impedance
(1)
Maximum
reverse leakage current
Z
ZT
at I
ZT
(Ω)
Z
ZK
(Ω)
at
I
ZK
(mA)
I
R
(µA)
at V
R
(V)
Surge
current
at
T
A
= 25°C
IR(mA)
Maximum
regulator
current
(2)
IZM(mA)
ZM4728 3.3 76 10 400 1.0 100 1.0 1380 276
ZM4729 3.6 69 10 400 1.0 100 1.0 1260 252
ZM4730 3.9 64 9 400 1.0 50 1.0 1190 234
ZM4731 4.3 58 9 400 1.0 10 1.0 1070 217
ZM4732 4.7 53 8 500 1.0 10 1.0 970 193
ZM4733 5.1 49 7 550 1.0 10 1.0 890 178
ZM4734 5.6 45 5 600 1.0 10 2.0 810 162
ZM4735 6.2 41 2 700 1.0 10 3.0 730 146
ZM4736 6.8 37 3.5 700 1.0 10 4.0 660 133
ZM4737 7.5 34 4.0 700 0.5 10 5.0 605 121
ZM4738 8.2 31 4.5 700 0.5 10 6.0 550 110
ZM4739 9.1 28 5.0 700 0.5 10 7.0 500 100
ZM4740 10 25 7 700 0.25 10 7.6 454 91
ZM4741 11 23 8 700 0.25 5 8.4 414 83
ZM4742 12 21 9 700 0.25 5 9.1 380 76
ZM4743 13 19 10 700 0.25 5 9.9 344 69
ZM4744 15 17 14 700 0.25 5 11.4 304 61
ZM4745 16 15.5 16 700 0.25 5 12.2 285 57
ZM4746 18 14 20 750 0.25 5 13.7 250 50
ZM4747 20 12.5 22 750 0.25 5 15.2 225 45
ZM4748 22 11.5 23 750 0.25 5 16.7 205 41
ZM4749 24 10.5 25 750 0.25 5 18.2 190 38
ZM4750 27 9.5 35 750 0.25 5 20.6 170 34
ZM4751 30 8.5 40 1000 0.25 5 22.8 150 30
ZM4752 33 7.5 45 1000 0.25 5 25.1 135 27
ZM4753 36 7.0 50 1000 0.25 5 27.4 125 25
ZM4754 39 6.5 60 1000 0.25 5 29.7 115 23
ZM4755 43 6.0 70 1500 0.25 5 32.7 110 22
ZM4756 47 5.5 80 1500 0.25 5 35.8 95 19
ZM4757 51 5.0 95 1500 0.25 5 38.8 90 18
ZM4758 56 4.5 110 2000 0.25 5 42.6 80 16
ZM4759 62 4.0 125 2000 0.25 5 47.1 70 14
ZM4760 68 3.7 150 2000 0.25 5 51.7 65 13
ZM4761 75 3.3 175 2000 0.25 5 56.0 60 12
ZM4762 82 3.0 200 3000 0.25 5 62.2 55 11
ZM4763 91 2.8 250 3000 0.25 5 69.2 50 10
ZM4764 100 2.5 350 3000 0.25 5 76.0 45 9
NOTES:
(1) The Zener impedance is derived from the 1KH
Z
AC voltage which results when an AC current having an RMS value equal to 10% of the Zener current (IZTor IZK)
is superimposed on I
ZT
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 at a distance of 10mm from case are kept at ambient temperature
(3) Measured under thermal equilibrium and DC test conditions
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