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 25C 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 I
F
= 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
= 25C
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 25C ambient temperature unless otherwise specified.
Type
Nominal
Zener
voltage
(3)
at
I
ZT
V
Z
(V)
Test
current
I
ZT
(mA)
Maximum Zener impedance
(1)
Maximum
reverse leakage current
Z
ZT
at I
ZT
()
Z
ZK
()
at
I
ZK
(mA)
I
R
(
A)
at V
R
(V)
Surge
current
at
T
A
= 25C
I
R
(mA)
Maximum
regulator
current
(2)
I
ZM
(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 (I
ZT
or I
ZK
)
is superimposed on I
ZT
or I
ZK
. 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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