SMD Zener Diode
SMD Diodes Specialist
CZRA4728-HF Thru. CZRA4755-HF
Voltage: 3.3 to 43 Volts
Power: 1.0 Watts
RoHS Device
Halogen Free
DO-214AC/SMA
Features
-Batch process design, excellent power dissipation
offers better reverse leakage current and thermal
resistance.
-Glass pasisivated chip junction.
-Typical IR less than 0.5µA above 11V.
-Standard zener voltage tolerance ±5%.
-Low inductance.
0.196(4.9)
0.180(4.4)
0.012(0.3) Typ.
0.106(2.7)
0.091(2.3)
Mechanical data
-Epoxy: UL94-V0 rated flame retardant.
-Case: Molded plastic, JEDEC DO-214AC/SMA .
-Terminals: Solder Plated,solderable per
MIL-STD-750,method 2026.
-Polarity: Indicated by Cathode band.
-Mounting position: Any.
-Weight: 0.05 gram(approx.).
Dimensions in inches and (millimeter)
0.068(1.7)
0.060(1.5)
0.032(0.8)Typ.
0.032(0.8)Typ.
Maximum Rating And Electrical Characteristics
(T
A
=25°C, unless otherwise noted)
Parameter
Forward voltage
Power Dissipation
8.3ms single half sine-wave
superimposed on rate load
(JEDEC method)
Junction to case
Thermal resistance
Junction to ambient
Storge temperature
Operating temperature
R
θJA
T
J
T
J
-65
-55
110
+175
+150
°C/W
°C
°C
Condition
IF =200 mA DC
Symbol
V
F
P
D
MIN.
TYP.
MAX.
1.20
1000
Units
V
V
Peak surge forward current
I
FSM
R
θJC
100
100
A
°C/W
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Page 1
SMD Zener Diode
SMD Diodes Specialist
Electrical Characteristics ( at T
A
= 25°C unless otherwise noted)
Zener Voltage
Part Number
Marking
Code
Volts
V
Z
@I
ZT
Test Current
I
ZT
mA
Zener Impedance
Z
ZT
@ I
ZT
Z
ZK
@ I
ZK
oHMs
oHMs
I
ZK
mA
Leakage Current
I
R
uA
V
R
Volts
Surge Current
I
surge
mA
CZRA4728-HF
CZRA4729-HF
CZRA4730-HF
CZRA4731-HF
CZRA4732-HF
CZRA4733-HF
CZRA4734-HF
CZRA4735-HF
CZRA4736-HF
CZRA4737-HF
CZRA4738-HF
CZRA4739-HF
CZRA4740-HF
CZRA4741-HF
CZRA4742-HF
CZRA4743-HF
CZRA4744-HF
CZRA4745-HF
CZRA4746-HF
CZRA4747-HF
CZRA4748-HF
CZRA4749-HF
CZRA4750-HF
CZRA4751-HF
CZRA4752-HF
CZRA4753-HF
CZRA4754-HF
CZRA4755-HF
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
Z39
Z43
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
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
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
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
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
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
5
5
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
25.4
27.4
29.7
32.7
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
105
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Page 2
SMD Zener Diode
SMD Diodes Specialist
RATING AND CHARACTERISTIC CURVES (CZRA4728-HF Thru. CZRA4755-HF)
FIG 1A. Range for Units to 12 Volts
12
Temperature Coefficient, (mV/°C)
10
8
6
4
2
Range
FIG 1B. Range for Units 12 to 100 Volts
100
Temperature Coefficient, (mV/°C)
10
Range
0
-2
-4
2
3
4
5
6
7
8
9
10
11
12
V
Z
@I
ZT
V
Z
@I
ZT
1
10
50
Zener Voltage, (V)
100
Zener Voltage, (V)
FIG 2. Temperature Coefficients (-55°C to +150°C temperature change ; 90% of the units are in the ranges indicated.)
Junction to lead thermal, (mV/°C/W)
Temperature Coefficient, (mV/°C)
175
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
Lead length to heat sink, (Inches)
6
4
20mA
2
1mA
0
-2
-4
3
4
5
6
7
8
Zener Voltage, (V)
0.01mA
V
Z
@I
ZT
T
A
=25
O
C
Note: Below 3V and above 8V changes
in Zener Voltage do not affect temperature
FIG 3. Typical Thermal Resistance
Versus Lead
1000
Dynamic impedance, (ohms)
IZ=1mA
FIG 4. Effect of Zener Current
400
Capacitance, (pF)
0V bias
100
100
1V bias
IZ=5mA
IZ=20mA
10
T
J
=25°C
I
Z
(ms)=0.1I
Z
(do)
f=60H
Z
1
1
10
Zener Current,(mA)
100
10
50% of breakdown
bias
4
1
10
Nominal Vz, (V)
100
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Page 3
SMD Zener Diodes
SMD Diodes Specialist
Reel Taping Specification
P
0
P
1
d
Index hole
E
T
F
B
P
A
W
C
12
0
o
D
2
D
1
D
W
1
Trailer
.......
.......
10 pitches (min)
Device
.......
.......
.......
.......
Leader
.......
.......
10 pitches (min)
End
Start
Direction of Feed
SYMBOL
DO-214AC (SMA)
A
2.8
±
0.10
0.110
±
0.004
B
5.00
±
0.10
0.197
±
0.004
C
1.90
±
0.10
0.075
±
0.004
d
1.50
±
0.10
0.059
±
0.004
D
178
±
2.00
7.008
±
0.078
D
1
62.0 MIN.
2.441 MIN.
D
2
13.0
±
0.50
0.512
±
0.008
(mm)
(inch)
SYMBOL
DO-214AC (SMA)
E
1.75
±
0.10
0.069
±
0.004
F
5.50
±
0.10
0.217
±
0.002
P
4.00
±
0.10
0.157
±
0.004
P
0
4.00
±
0.10
0.157
±
0.004
P
1
2.00
±
0.10
0.079
±
0.004
W
12.00
±
0.30
0.472
±
0.012
W
1
18.00
±
1.00
0.709
±
0.040
(mm)
(inch)
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Page 4
Comchip Technology CO., LTD.
SMD Zener Diode
SMD Diodes Specialist
Suggested PAD Layout
DO-214AC (SMA)
SIZE
(mm)
A
B
C
D
E
3.80
1.60
2.80
5.40
2.20
(inch)
0.150
0.063
D
A
E
C
0.110
0.213
B
0.087
Standard Package
Qty per Reel
Case Type
(Pcs)
DO-214AC (SMA)
Reel Size
(inch)
7
2000
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Page 5
Comchip Technology CO., LTD.
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