ZS4728A Thru ZS4753A
Surface Mount Zener Diodes
P b
Lead(Pb)-Free
Features
*1W Power Dissipation
*For Surface Mounted Applications
*Low zener Impedance
*Low Regulation Factor
*Zener Breakdown Voltage Range 3.3V to 36V
Mechanical Data
*Case : SMA-1
*Terminals : Solderable per MIL-STD-202,Method 208
*Polarity : Color Band Denotes Cathode
*Marking : Marking Code(See Table on Page 2)
*Mounting Position : Any
*Weight : 0.05 grams
SURFACE MOUNT
ZENER DIODES
1.0 WATTS
SMA-1
SMA-1 Outline Dimension
B
C
A
E
J
H
H
unit:mm
SMA-1
Dim
A
B
C
E
H
J
Min
2.40
4.40
0.30
3.80
1.00
1.50
Max
2.80
4.80
0.30
4.20
1.00
1.70
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Maximum Ratings
(TA=25 C Unless Otherwise Noted)
Symbol
Characteristics
Power Dissipation T
L
=55 C
Maximun junction Temperature
Storage Temperature Range
P
D
Tj
T
STG
Value
1.0
150
-55 to +150
Unit
W
C
C
ELECTRICAL CHARACTERISTICS
(T A =25 C Unless Otherwise Noted VF=1.2V MAX, IF = 200mA for all types)
Device
ZS4728A
ZS4729A
ZS4730A
ZS4731A
ZS4732A
ZS4733A
ZS4734A
ZS4735A
ZS4736A
ZS4737A
ZS4738A
ZS4739A
ZS4740A
ZS4741A
ZS4742A
ZS4743A
ZS4744A
ZS4745A
ZS4746A
ZS4747A
ZS4748A
ZS4749A
ZS4750A
ZS4751A
ZS4752A
ZS4753A
Device
Marking
Z3V3
Z3V6
Z3V9
Z4V3
Z4V7
Z5V1
Z5V6
Z6V2
Z6V8
Z7V5
Z8V2
Z9V1
Z10
Z11
Z12
Z13
Z15
Z16
Z18
Z20
Z22
Z24
Z27
Z30
Z33
Z36
Zener Voltage
VZ(Nom)@I
ZT
Volts
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
Zener Impedance
Z
ZT
@I
ZT
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
Leakage Current Surge Current
I
R
@V
R
I
RM
@T
A
=25ºC
Z
ZK
@I
ZK
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
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
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
µA
100
100
50
10
10
10
10
10
10
10
10
10
10
5
5
5
5
5
5
5
5
5
5
5
5
5
Volts
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
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
NOTE: 1. Based on dc-Measurement at Thermal Equilibrium.
2. Surge current is a non-repetitive, 8.3ms pulse width square wave or equivalent sine-wave superimposed on IZT per JEDEC method
3. SUFFIX “A” FOR ± 5%
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Typical Characteristics
θ
V
Z
, TEMPERATURE COEFFICIENT
( mV/
℃
)
+12
+10
+8
+6
+4
+2
0
-2
-4
2
3
4
5
6
7
8
9
10
11 12
RANGE
V
Z
＠I
ZT
θ
V
Z
, TEMPERATURE COEFFICIENT
( mV/
℃
)
100
70
50
30
20
10
7
5
3
2
1
10
20
30
50
70
100
V
Z
, ZENER VOLTAGE (VOLTS)
RANGE
V
Z
＠I
ZT
FiG.1 Range for Units to 12 Volts
175
θ
V
Z
, TEMPERATURE COEFFICIENT
( mV/
℃
)
θ
JL,
JUMCTION TO LEAD THERMAL
150
125
100
75
50
25
0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9 1.0
L, LEAD LENGTH TO HEAT SINK (INCHES)
+6
+4
+2
0
V
Z
, ZENER VOLTAGE (VOLTS)
FiG.2 Range for Units to 12 to 36 Volts
V
Z
＠I
Z
T
A
=25℃
20mA
0.01mA
1mA
-2
-4
NOTE:BELOW 3 VOLTS AAND ABOCE 8
VOLTS
CHANGES IN ZENER CURRENT DO NOT
3
4
5
6
7
8
FIG.3 Temperature Coefficients
1000
700
500
200
100
70
50
20
10
7
5
2
1
1
2
3
5
7
10
20
I
z
=1mA
Lead V.S. θ
JL
FIG.4 Temperature Coefficients
400
300
200
C, CAPACITANCE (
P
F)
V
Z
,
ZENER VOLTAGE (VOLTS)
V
Z
V.S. θ
JL
Z
Z
DYNAMIC IMPEDANCE (OHNS)
T
j
=25℃
I
z
(ms)=0.1I
z
(do)
f=60h
z
0VBIAS
5mA
100
50
20
10
8
4
1
2
0VBIAS
20mA
50% OF BREAKDOWNBIAS
30
50 70
100
5
10
20
50
100
V
Z,
ZENER CURRENT (mA)
FIG. Typical Thermal
5
Resistance V.S. Lead
1.25
FIG.6 Effect of Zener Current
V
Z
, NOMINAL V
Z
(VOLTS)
P
D
,MAXIMUM DISSIPATION
(WATTS)
1.0
0.75
0.5
0.25
0
20
40
60
80
100
120 140 160
T
L
, LEAD TEMPERATURE (
O
C)
180
200
FIG.7 Power Temperature Derating Curve
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