ZM4728...ZM4761
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.
These diodes are also available in DO-41 case with the
type designation 1N4728...1N4761
LL-41
Absolute Maximum Ratings (T
a
= 25
O
C)
Parameter
Power Dissipation
Junction Temperature
Storage Temperature Range
1)
Symbol
P
tot
T
j
T
stg
Value
1
1)
Unit
W
O
175
- 65 to + 175
C
C
O
Valid provided that electrodes are kept at ambient temperature.
Characteristics at T
a
= 25
O
C
Parameter
Thermal Resistance Junction to Ambient Air
Forward Voltage
at I
F
= 200 mA
1)
Symbol
R
thA
V
F
Max.
170
1)
1.2
Unit
K/W
V
Valid provided that electrodes are kept at ambient temperature.
ZM4728...ZM4761
Characteristics at T
a
= 25
O
C
Zener Voltage
3)
Type
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
1)
Dynamic Resistance
1)
Z
ZT
Max. (Ω)
10
10
9
9
8
7
5
2
3.5
4
4.5
5
7
8
9
10
14
16
20
22
23
25
35
40
45
50
60
70
80
95
110
125
150
175
Z
ZK
Max. (Ω)
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
at I
ZK
(mA)
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
Reverse Current
I
R
Max. (µA)
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
at V
R
(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
V
Znom
(V)
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
at l
ZT
(mA)
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
6.5
6
5.5
5
4.5
4
3.7
3.3
Maximum Surge
Current
4)
at T
a
= 25
O
C
I
ZSM
(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
Maximum
Regulator
Current
2)
I
ZM
(mA)
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
The dynamic resistance 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 (I
ZT
or I
ZK
) is superimposed on I
ZT
or I
ZK
. Dynamic resistance 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)
Tested with pulses tp = 20 ms.
4)
The rating listed in the electrical characteristics table is maximum peak, non-repetitive, reverse surge current of 1/2 square wave or
equivalent sine wave pulse of 1/120 second duration superimposed on the test current I
ZT
.
ZM4728...ZM4761
Admissible power dissipation
versus ambient temperature
Valid provided that electrodes are kept
at ambient temperature
W
1.0
ZM4728...
P
tot
0.8
0.6
0.4
0.2
0
0
100
200 C
Tamb
o
Microchip MCU
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