1N4728A Series
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless
otherwise noted, V
F
= 1.2 V Max., I
F
= 200 mA for all types)
Symbol
V
Z
I
ZT
Z
ZT
I
ZK
Z
ZK
I
R
V
R
I
F
V
F
I
r
Parameter
Reverse Zener Voltage @ I
ZT
Reverse Current
Maximum Zener Impedance @ I
ZT
Reverse Current
Maximum Zener Impedance @ I
ZK
Reverse Leakage Current @ V
R
Breakdown Voltage
Forward Current
Forward Voltage @ I
F
Surge Current @ T
A
= 25°C
V
Z
V
R
I
R
V
F
I
ZT
V
I
F
I
Zener Voltage Regulator
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise noted, V
F
= 1.2 V Max, I
F
= 200 mA for all types)
Zener Voltage
(3.)(4.)
JEDEC
Device
(2.)
1N4728A
1N4729A
1N4730A
1N4731A
1N4732A
V
Z
(Volts)
Min
3.14
3.42
3.71
4.09
4.47
Nom
3.3
3.6
3.9
4.3
4.7
Max
3.47
3.78
4.10
4.52
4.94
@ I
ZT
(mA)
76
69
64
58
53
Zener Impedance
(5.)
Z
ZT
@ I
ZT
(W)
10
10
9
9
8
Z
ZK
@ I
ZK
(W)
400
400
400
400
500
(mA)
1
1
1
1
1
Leakage Current
I
R
@ V
R
(µA Max)
100
100
50
10
10
(Volts)
1
1
1
1
1
I
r (6.)
(mA)
1380
1260
1190
1070
970
1N4733A
1N4734A
1N4735A
1N4736A
1N4737A
1N4738A
1N4739A
1N4740A
1N4741A
1N4742A
1N4743A
1N4744A
1N4745A
4.85
5.32
5.89
6.46
7.13
7.79
8.65
9.50
10.45
11.40
12.4
14.3
15.2
5.1
5.6
6.2
6.8
7.5
8.2
9.1
10
11
12
13
15
16
5.36
5.88
6.51
7.14
7.88
8.61
9.56
10.50
11.55
12.60
13.7
15.8
16.8
49
45
41
37
34
31
28
25
23
21
19
17
15.5
7
5
2
3.5
4
4.5
5
7
8
9
10
14
16
550
600
700
700
700
700
700
700
700
700
700
700
700
1
1
1
1
0.5
0.5
0.5
0.25
0.25
0.25
0.25
0.25
0.25
10
10
10
10
10
10
10
10
5
5
5
5
5
1
2
3
4
5
6
7
7.6
8.4
9.1
9.9
11.4
12.2
890
810
730
660
605
550
500
454
414
380
344
304
285
TOLERANCE AND TYPE NUMBER DESIGNATION
2. The JEDEC type numbers listed have a standard tolerance on the nominal zener voltage of
±5%.
SPECIALS AVAILABLE INCLUDE:
3. Nominal zener voltages between the voltages shown and tighter voltage tolerances. For detailed information on price, availability, and
delivery, contact your nearest ON Semiconductor representative.
ZENER VOLTAGE (V
Z
) MEASUREMENT
4. ON Semiconductor guarantees the zener voltage when measured at 90 seconds while maintaining the lead temperature (T
L
) at 30°C
±
1°C, 3/8″ from the diode body.
ZENER IMPEDANCE (Z
Z
) DERIVATION
5. The zener impedance is derived from the 60 cycle ac voltage, which results when an ac current having an rms value equal to 10% of the
dc zener current (I
ZT
or I
ZK
) is superimposed on I
ZT
or I
ZK
.
SURGE CURRENT (I
R
) NON-REPETITIVE
6. The rating listed in the electrical characteristics table is maximum peak, non-repetitive, reverse surge current of 1/2 square wave or equiv-
alent sine wave pulse of 1/120 second duration superimposed on the test current, I
ZT
, per JEDEC registration; however, actual device
capability is as described in Figure 5 of the General Data – DO-41 Glass.
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