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 (T
a
= 25
o
C)
Symbol
Zener Current see Table “Characteristics”
Power Dissipation
Junction Temperature
Storage Temperature Range
1)
Value
1)
Unit
P
tot
T
j
T
S
1
W
O
O
175
-65 to +175
C
C
Valid provided that electrodes are kept at ambient temperature.
Characteristics at T
amb
= 25
o
C
Symbol
Thermal Resistance
Junction to Ambient Air
Forward Voltage
at I
F
= 200mA
1)
Min.
-
-
Typ.
-
-
Max.
170
1)
1.2
Unit
K/W
V
R
thA
V
F
Valid provided that electrodes are kept at ambient temperature.
SEMTECH ELECTRONICS LTD.
®
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
Dated : 10/05/2005
ZM 4728...ZM 4764
Nominal
Zener
voltage
3)
TYPE
at
I
ZT
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
Impedance
1)
Maximum reverse
leakage current
Surge
current
Maxi-
mum
regulator
current
2)
I
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
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.7
3.3
3.0
2.8
2.5
at
I
ZT
VzΩ
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
VzkΩ
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
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
0.25
0.25
0.25
I
R
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
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
56.0
62.2
69.2
76
at
T
A
= 25
o
C
I
R
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
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
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 (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 are kept at ambient temperature.
3) Measured under thermal equilibrium and DC test conditions.
SEMTECH ELECTRONICS LTD.
®
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
Dated : 10/05/2005
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...
P
tot
0.8
0.6
0.4
0.2
0
0
100
200 C
Tamb
o
SEMTECH ELECTRONICS LTD.
®
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
Dated : 10/05/2005
