1N4728A SERIES
SILICON ZENER DIODE
VOLTAGE
FEATURES
• Low inductance
• High temperature soldering : 260°C /10 seconds at terminals
• Plastic package has Underwriters Laboratory Flammability
Classification 94V-O
• Lead free in compliance with EU RoHS 2.0
0.205(5.2)
0.160(4.1)
0.034(0.86)
0.028(0.71)
3.3
to
68
Volt
POWER
1 Watt
MECHANICAL DATA
• Case: Molded plastic DO-41
• Epoxy: UL 94V-O rate flame retardant
• Terminals: Axial leads, solderable per MIL-STD-750, Method 2026
guaranteed
• Polarity: Color band denotes cathode end
• Weight: 0.012 ounce, 0.3 gram
• Packing information
B
- 1K per Bulk box
T/R - 5K per 13" paper Reel
T/B - 3K per horiz. tape & Ammo box
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25°C ambient temperature unless otherwise specified.
Parameter
Power Dissipation at Tamb = 25
Junction Temperature
Storage Temperature Range
O
Symbol
1.0(25.4)MIN.
0.107(2.7)
0.080(2.0)
Value
1*
-55 to + 150
-55 to + 150
Units
W
O
C
P
TOT
T
J
T
STG
C
C
O
*Valid provided that leads at a distance of 10mm from case are kept at ambient temperature.
May 21,2019-REV.09
PAGE . 1
1N4728A SERIES
N o m in a l Ze n e r Vo lta g e
Part Number
Nom. V
1.0 Watt ZENER
1N4728A
1N4730A
1N4731A
1N4732A
1N4733A
1N4734A
1N4735A
1N4736A
1N4737A
1N4738A
1N4739A
1N4740A
1N4741A
1N4742A
1N4743A
1N4744A
1N4745A
1N4746A
1N4747A
1N4748A
1N4749A
1N4750A
1N4751A
1N4752A
1N4753A
1N4754A
1N4755A
1N4756A
1N4757A
1N4758A
1N4759A
1N4760A
3.3
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
3.1
3.7
4.1
4.5
4.8
5.3
5.9
6.46
7.13
7.79
8.65
9.5
10.45
11.4
12.35
14.25
15.2
17.1
19
20.9
22.8
25.65
28.5
31.35
34.2
37.05
40.85
44.65
48.45
53.2
58.9
64.6
3.5
4.1
4.5
4.9
5.4
5.9
6.5
7.14
7.88
8.61
9.56
10.5
11.55
12.6
13.65
15.75
16.8
18.9
21
23.1
25.2
28.35
31.5
34.65
37.8
40.95
45.15
49.35
53.55
58.8
65.1
71.4
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
80
95
110
125
150
76
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
6.5
6
5.5
5
4.5
4
3.7
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
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
100
50
10
10
10
10
10
5
5
5
0.5
0.5
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
5
5
5
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
1N4728A
1N4730A
1N4731A
1N4732A
1N4733A
1N4734A
1N4735A
1N4736A
1N4737A
1N4738A
1N4739A
1N4740A
1N4741A
1N4742A
1N4743A
1N4744A
1N4745A
1N4746A
1N4747A
1N4748A
1N4749A
1N4750A
1N4751A
1N4752A
1N4753A
1N4754A
1N4755A
1N4756A
1N4757A
1N4758A
1N4759A
1N4760A
V
Z
@ I
ZT
Min . V
Ma x . V
Ω
Ma x imu m Ze n e r Im p e d a n c e
Z
ZT
@ I
ZT
mA
Ω
Z
ZK
@ I
ZK
mA
uA
M a x imu m Leakage Current
I
R
@ V
R
V
Marking
Code
May 21,2019-REV.09
PAGE . 2
1N4728A SERIES
C
J
, Junction Capacitance (pF)
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1000
0V BIAS
1V BIAS
100
50% VZ BIAS
P
D
, Maximum Power
Dissipation (w)
0
25
50
75
100 125 150 175 200
10
T
A
, Ambient Temperature (°C)
Fig.1 Steady-State Power Derating Curve
1
V
Z
, Zener Voltage (V)
10
100
Fig.2 Typical Junction Capacitance
1000
10000.0
1000.0
100.0
10.0
1.0
0.1
I
F
, Forward Current (mA)
I
R
, Leakage Current(nA)
Typical Leakage Current at 80% of
Nominal Breakdown Voltage
T
J
= 150°C
100
T
J
=
125°C
T
J
= 25°C
T
J
= 125°C
T
J
= 25°C
10
T
J
= 75°C
1
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
0
20
40
60
V
Z
, Nominal Zener Voltage (V)
V
F
, Forward Voltage (V)
Fig.3 Typical Leakage Characteristics
1000
Fig.4 Typical Forward Characteristics
1000
Zz,Dynamic Impedance (OHMS)
100
Zz,Dynamic Impedance (OHMS)
51V
100
I
Z
=1mA
10
I
Z
=5mA
I
Z
=20mA
0.1
1
10
100
10
22V
1
6.8V
1
0.1
0.5
I
Z
, Zener Current (mA)
5
50
V
Z
, Zener Voltage (V)
Fig.5 Typical Effect Of Zener Current On Zener
Impedance
Fig.6 Typical Effect Of Zener Voltage On Zener
Impedance
May 21,2019-REV.09
PAGE . 3
1N4728A SERIES
100
80
60
40
20
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
θV
Z
, Temperature Coefficient
(mV/
o
C)
120
θ
JL
, Junction To Lead Thermal
Resistance (
o
C / W )
100
10
1
1
10
100
L, Lead Length To Heat Sink (Inches)
Fig.7 Thermal Resistance Versus Lead Length
V
Z
, Zener Voltage (V)
Fig.8 Temperature Coefficient (+25
o
C To +150
o
C Temperature
Range ; 90% Of The Units Are In The Ranges Indicated)
May 21,2019-REV.09
PAGE . 4
1N4728A SERIES
Part No_packing code_Version
1N4728A_AY_10001
1N4728A_B0_00001
1N4728A_B0_10001
1N4728A_R2_00001
1N4728A_R2_10001
For example :
RB500V-40_R2_00001
Part No.
Serial number
Version code means HF
Packing size code means 13"
Packing type means T/R
Packing Code
XX
Packing type
Tape and Ammunition Box
(T/B)
Tape and Reel
(T/R)
Bulk Packing
(B/P)
Tube Packing
(T/P)
Tape and Reel (Right Oriented)
(TRR)
Tape and Reel (Left Oriented)
(TRL)
FORMING
1
st
Code
A
R
B
T
S
L
F
Packing size code
N/A
7"
13"
26mm
52mm
PANASERT T/B CATHODE UP
(PBCU)
PANASERT T/B CATHODE DOWN
(PBCD)
Version Code
XXXXX
2
nd
Code
HF or RoHS
1
st
Code 2
nd
~5
th
Code
0
1
2
X
Y
U
D
HF
RoHS
0
1
serial number
serial number
May 21,2019-REV.09
PAGE . 5
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