.
1WATT SURFACE MOUNT ZENER DIODE
FEATURES
LOW COST
SMALL SIZE
MECHANICAL DATA
CASESMA
TERMINALSSOLDERABLE PER MIL-STD -202, METHOD 208
POLARITYCOLOR BAND DENOTES CATHODE
MOUNTING POSITIONANY
WEIGHT0.05 GRAMS
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
RATINGS AT 25
C AMBIENT TEMPERATURE UNLESS OTHERWISE SPECIFIED
STORAGE AND OPERATING TEMPERATURE RANGE -55 TO + 150
ELECTRICAL CHARACTERISTICS (TA=25 UNLESS OTHERWISE NOTED) VF=1.2V MAX, IF = 200mA FOR ALL TYPES
MAXIMUM ZENER IMPEDANCE LEAKAGE
CURRENT
JEDEC
TYPE NO
MARKING
CODE
NOMINAL
ZENER
VOLTAGE
V
Z
@ I
ZT
VOLTS
TEST
CURRENT
I
ZT
Ma
Z
ZT
@
I
ZT
OHMS
Z
ZK
@ I
ZK
OHMS
I
ZK
Ma
I
R
A MAX
V
R
VOLTS
SURGE
CURRENT
@ TA=25
I
R
Ma
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
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
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
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
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
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
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
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
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
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
NOTESUFFIX "A" FOR 5
ZS4728A
THRU
ZS4753A
0.185(4.8)
0.173(4.4)
0.012(0.3) Typ.
0.110(2.8)
0.094(2.4)
0.165(4.2)
0.150(3.8)
0.067(1.7)
0.060(1.5)
0.040 (1.0) Typ.
0.040(1.0) Typ.
Dimensions in inches and (millimeters)
SMA
Formosa MS
RATINGS AND CHARACTERISTIC CURVES ZS4728A THRU ZS4753A
Figure 3. Typical Thermal Resistance versus Lead
1000
700
500
200
100
70
50
20
10
7
5
2
1
Z
Z
D
YNA
MI
C I
M
PE
DA
NC
E
(
O
H
N
S
)
1
2
3 5 7 10 20 30 50 70 100
V
Z,
ZENER CURRENT (mA)
I
z
=1mA
5mA
20mA
T
j
=25
I
z
(ms)=0.1I
z
(do)
f=60h
z
Figure 4. Effect of Zener Current
400
300
200
100
50
20
10
8
4
C,
C
A
P
A
C
I
T
ANC
E
(
P
F)
1 2 5 10 20 50 100
V
Z
, NOMINAL V
Z
(VOLTS)
50%OF BREAKDOWNBIAS
0VBIAS
0VBIAS
FIG.1A- Range for Units to 12 Volts
+12
+10
+8
+6
+4
+2
0
-2
-4
V
Z
,
TE
M
P
E
R
A
T
U
R
E COEFFIC
I
ENT
(
mV/
)
2 3 4 5 6 7 8 9 10 11 12
V
Z
, ZENER VOLTAGE (VOLTS)
RANGE
V
Z
I
ZT
FIG.1B- Range for Units to 12 to 100
100
70
50
30
20
10
7
5
3
2
1
V
Z
, T
E
M
P
ER
A
T
U
R
E C
O
EFF
I
C
I
EN
T
(
mV
/
)
10 20 30 50 70 100
V
Z
, ZENER VOLTAGE (VOLTS)
RANGE
V
Z
I
ZT
Figure 2. Temperature Coefficients (-55to+150temperature change;90% of the units are in the ranges indicated.)
175
150
125
100
75
50
25
0
JL,
JU
M
C
TIO
N
TO
LE
A
D
THER
MA
L
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1 0
+6
+4
+2
0
-2
-4
V
Z
, T
E
M
P
ER
A
T
U
R
E C
O
EFF
I
C
I
EN
T
(
mV
/
)
3 4 5 6 7
8
20mA
1mA
0.01mA
V
Z
I
Z
T
A
=25
NOTE:BELOW 3 VOLTS AAND ABOCE 8
VOLTS
CHANGES IN ZENER CURRENT DO NOT
L, LEAD LENGTH TO HEAT SINK (INCHES)
V
Z
, ZENER VOLTAGE (VOLTS)
1.25
1.0
0.75
0.5
0.25
Figure. 7 - Power Temperature Derating Curve
0 20 40 60 80 100 120 140 160 180 200
T
L
, LEAD TEMPERATURE (
O
C)
P
D
,
M
AXI
M
U
M
DI
S
S
I
P
A
T
I
O
N
(
W
A
T
T
S
)
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