ZM4728A - ZM4764A
1.0W SURFACE MOUNT ZENER DIODE
Features
·
·
·
1.0W Power Dissipation
3.9V - 100V Nominal Zener Voltages
Standard V
Z
Tolerance is 5%
DISCONTINUED
Use SMAZ OR DFLZ Series
A
Mechanical Data
·
·
·
·
Case: MELF, Glass
Terminals: Solderable per MIL-STD-202,
Method 208
Polarity: Cathode Band
Approx. Weight: 0.25 grams
C
B
MELF
Dim
A
B
C
Min
4.80
2.40
Max
5.20
2.60
0.55 Nominal
All Dimensions in mm
Maximum Ratings
@ T
A
= 25°C unless otherwise specified
Characteristic
Zener Current (see Table page 2)
Power Dissipation
Thermal Resistance - Junction to Ambient Air
Forward Voltage
Operating & Storage Temperature Range
@ I
F
= 200 mA
@ T
A
= 25°C
Symbol
I
Z
P
d
R
qJA
V
F
T
j
, T
STG
Value
P
d/
V
z
1
170
1.2
-65 to +200
Unit
mA
W
°C/W
V
°C
Notes:
1. Measured under thermal equilibrium and DC (I
ZT
) test conditions.
2. The Zener impedance is derived from the 60Hz 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.
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ZM4728A-ZM4764A
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Electrical Characteristics
Type
Number
Nominal
Zener
Voltage (1)
V
Z
@ I
ZT
V
ZM4728A
ZM4729A
ZM4730A
ZM4731A
ZM4732A
ZM4733A
ZM4734A
ZM4735A
ZM4736A
ZM4737A
ZM4738A
ZM4739A
ZM4740A
ZM4741A
ZM4742A
ZM4743A
ZM4744A
ZM4745A
ZM4746A
ZM4747A
ZM4748A
ZM4749A
ZM4750A
ZM4751A
ZM4752A
ZM4753A
ZM4754A
ZM4755A
ZM4756A
ZM4757A
ZM4758A
ZM4759A
ZM4760A
ZM4761A
ZM4762A
ZM4763A
ZM4764A
Notes:
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
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
@ T
A
= 25°C unless otherwise specified
Maximum Reverse
Leakage Current
I
R
µA
100
100
50
10
10
10
10
10
10
10
10
10
10
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
@ V
R
V
1.0
1.0
1.0
1.0
1.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
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
76.0
Max Surge
Current
8.3ms
I
ZS
mA
1380
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
Maximum
Zener
Current
I
ZM
mA
276
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
9.0
Maximum Zener Impedance (2)
Z
ZT
@ I
ZT
W
10
10
9.0
9.0
8.0
7.0
5.0
2.0
3.5
4.0
4.5
5.0
7.0
8.0
9.0
10
14
16
20
22
23
25
35
40
45
50
60
70
80
95
110
125
150
175
200
250
350
Z
ZK
@ I
ZK
W
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
I
ZK
mA
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
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
1. Measured under thermal equilibrium and DC (I
ZT
) test conditions.
2. The Zener impedance is derived from the 60Hz 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.
DISCONTINUED
Use SMAZ OR DFLZ Series
DS18009 Rev. 4 - 4
2 of 3
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ZM4728A-ZM4764A
1.0
P
d
, POWER DISSIPATION (W)
0.8
0.6
0.4
0.2
0
0
100
T
A
, AMBIENT TEMPERATURE (°C)
Fig. 1, Power Derating Curve
200
DISCONTINUED
Use SMAZ OR DFLZ Series
DS18009 Rev. 4 - 4
3 of 3
www.diodes.com
ZM4728A-ZM4764A
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