Silicon 1 Watt Zener Diodes
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
Copyright
2003
7-23-2003 REV A
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S C O T T S D A L E D I V I S I O N
1N4728AP thru 1N4764AP (PLASTIC)
1
N
4
7
2
8
A
P
-
1
N
4
7
6
4
A
P
(
P
l
a
s
t
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c
)
DESCRIPTION
APPEARANCE
The popular 1N4728A thru 1N4764A series of 1.0 watt Zeners provides
voltage regulation in a selection from 3.3 to 100 volts in 5% tolerances with
other tolerances also available as identified by different suffix letters on the
part number. These plastic encapsulated Zeners are moisture classified as
Level 1 with no dry pack required and are also available in various military
screening levels by adding a prefix identifier as also described in the
Features section. Microsemi also offers numerous other Zener products to
meet higher and lower power applications.
DO-41 or
DO-204AL
(Plastic)
IMPORTANT: For the most current data, consult MICROSEMI's website:
http://www.microsemi.com
FEATURES
APPLICATIONS / BENEFITS
JEDEC registered 1N4728A to 1N4764A
Extensive voltage selection from 3.3 to 100 V
Options for screening in accordance with MIL-
PRF-19500 for JAN, JANTX, JANTXV, and JANS
are available by adding MQ, MX, MV, or MSP
prefixes respectively to part numbers.
Surface mount equivalents available as
SMAJ4728A to SMAJ4764A and MLL4728A to
MLL4764A (consult factory for others)
Regulates voltage over a broad operating current and
temperature range
Standard voltage tolerances are plus/minus 5% with
A suffix and 10 % with no suffix identification
Tight tolerances available in plus or minus 2% or 1%
with C or D suffix respectively
Flexible axial-lead mounting terminals
Nonsensitive to ESD per MIL-STD-750 Method 1020
Moisture classification is Level 1 per IPC/JEDEC J-
STD-020B with no dry pack required
MAXIMUM RATINGS
MECHANICAL AND PACKAGING
Power dissipation at 25
C: 1.0 watts (also see
derating in Figure 1).
Operating and Storage temperature: -65
C to
+150
C
Thermal Resistance: 45
C/W junction to lead at
3/8 (10 mm) lead length from body, or 105
C/W
junction to ambient when mounted on FR4 PC
board (1 oz Cu) with 4 mm
2
copper pads and
track width 1 mm, length 25 mm
Steady-State Power: 1.0 watts at T
L
< 105
o
C 3/8
inch (10 mm) from body or at T
A
< 45
C when
mounted on FR4 PC board as described for
thermal resistance above (also see Figure 1)
Forward voltage @200 mA: 1.2 volts (maximum)
Solder Temperatures: 260
C for 10 s (max)
CASE: Void-free transfer molded thermosetting
epoxy body meeting UL94V-0
TERMINALS: Leads, tin-lead plated solderable per
MIL-STD-750, method 2026
POLARITY: Cathode indicated by band. Diode to be
operated with the banded end positive with respect to
the opposite end for Zener regulation
MARKING: Part number
TAPE & REEL option: Standard per EIA-296 (add
"TR" suffix to part number)
WEIGHT: 0.7 grams
See package dimensions on last page
Silicon 1 Watt Zener Diodes
S C O T T S D A L E D I V I S I O N
1N4728AP thru 1N4764AP (PLASTIC)
W
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1
N
4
7
2
8
A
P
-
1
N
4
7
6
4
A
P
(
P
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a
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)
ELECTRICAL CHARACTERISTICS*
ZENER
VOLTAGE
(Vz)
(Note 4)
TEST
CURRENT
(I
ZT
)
MAXIMUM
DYNAMIC
IMPEDANCE
(Z
ZT
@ I
ZT
)
(Note 2)
MAXIMUM
REVERSE
CURRENT
(I
R
@ V
R
)
TEST
VOLTAGE
(V
R
)
MAXIMUM
REGULATOR
CURRENT
(I
ZM
)
TA = 50
o
C
MAXIMUM
KNEE
IMPEDANCE
(Z
ZK
@ I
ZK
)
(Note 2)
TEST
CURRENT
(I
ZK
)
MAXIMUM
(SURGE)
CURRENT
(I
S
)
(Note 3)
JEDEC
TYPE
NUMBER
(Note 1)
VOLTS mA OHMS
A
VOLTS mA OHMS mA mA
1N4728A
1N4729A
1N4730A
1N4731A
3.3
3.6
3.9
4.3
76
69
64
58
10
10
9
9
100
100
50
10
1
1
1
1
276
252
234
217
400
400
400
400
1.0
1.0
1.0
1.0
1380
1260
1190
1070
1N4732A
1N4733A
1N4734A
1N4735A
4.7
5.1
5.6
6.2
53
49
45
41
8
7
5
2
10
10
10
10
1
1
2
3
193
178
162
146
500
550
600
700
1.0
1.0
1.0
1.0
970
890
810
730
1N4736A
1N4737A
1N4738A
1N4739A
6.8
7.5
8.2
9.1
37
34
31
28
3.5
4.0
4.5
5.0
10
10
10
10
4
5
6
7
133
121
110
100
700
700
700
700
1.0
0.5
0.5
0.5
660
605
550
500
1N4740A
1N4741A
1N4742A
1N4743A
10
11
12
13
25
23
21
19
7
8
9
10
10
5
5
5
7.6
8.4
9.1
9.9
91
83
76
69
700
700
700
700
0.25
0.25
0.25
0.25
454
414
380
344
1N4744A
1N4745A
1N4746A
1N4747A
15
16
18
20
17
15.5
14
12.5
14
16
20
22
5
5
5
5
11.4
12.2
13.7
15.2
61
57
50
45
700
700
750
750
0.25
0.25
0.25
0.25
304
285
250
225
1N4748A
1N4749A
1N4750A
1N4751A
22
24
27
30
11.5
10.5
9.5
8.5
23
25
35
40
5
5
5
5
16.7
18.2
20.6
22.8
41
38
34
30
750
750
750
1000
0.25
0.25
0.25
0.25
205
190
170
150
1N4752A
1N4753A
1N4754A
1N4755A
33
36
39
43
7.5
7.0
6.5
6.0
45
50
60
70
5
5
5
5
25.1
27.4
29.7
32.7
27
25
23
22
1000
1000
1000
1500
0.25
0.25
0.25
0.25
135
125
115
110
1N4756A
1N4757A
1N4758A
1N4759A
47
51
56
62
5.5
5.0
4.5
4.0
80
95
110
125
5
5
5
5
35.8
38.8
42.6
47.1
19
18
16
14
1500
1500
2000
2000
0.25
0.25
0.25
0.25
95
90
80
70
1N4760A
1N4761A
1N4762A
1N4763A
68
75
82
91
3.7
3.3
3.0
2.8
150
175
200
250
5
5
5
5
51.7
56.0
62.2
69.2
13
12
11
10
2000
2000
3000
3000
0.25
0.25
0.25
0.25
65
60
55
50
1N4764A 100 2.5
350
5
76.0
9
3000
0.25
45
*JEDEC Registered Data
NOTES:
1.
The JEDEC type numbers shown with an A suffix have a 5% tolerance on nominal zener voltage. No suffix signifies a 10% tolerance,
C signifies 2%, and D signifies 1% tolerance. Also add a P suffix for designating plastic construction, e.g. 1N4764AP (G suffix
designates glass body options described by separate data sheet).
2.
The Zener impedance is derived from the 60 Hz ac voltage that 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
. Zener impedance is measured at two points to ensure a sharp knee on the
breakdown curve and eliminate unstable units. See MicroNote 202 for zener impedance variation with different operating currents.
3.
The reverse surge current is measured at 25
o
C ambient using a square wave or equivalent sine wave pulse 1/120 second duration
superimposed on I
ZT
.
4. Zener
voltage
(V
Z
) is measured at T
L
= 25C (+8, -2C) and 90 seconds after application of dc current.
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
Copyright
2003
7-23-2003 REV A
Silicon 1 Watt Zener Diodes
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3
Copyright
2003
7-23-2003 REV A
W
W
W
.
Mi
c
r
o
s
e
m
i
.
C
O
M
S C O T T S D A L E D I V I S I O N
1N4728AP thru 1N4764AP (PLASTIC)
1
N
4
7
2
8
A
P
-
1
N
4
7
6
4
A
P
(
P
l
a
s
t
i
c
)
GRAPHS
TEMPERATURE CO
EFFICIENT
mV/oC
RATED P
O
W
E
R DISSIPATION -
W
T
L
T
A
on FR4
PC board
T
L
, LEAD TEMP. (
o
C) 3/8" from body
NOMINAL ZENER VOLTAGE (VOLTS)
FIGURE 3
or
T
A
on FR4 PC Board
FIGURE 2
Capacitance vs. Voltage for Representative Types
FIGURE 1
Temp. Coeff. vs. Zener Voltage
Power Derating Curve
PACKAGE DIMENSIONS (DO-41 or DO-204AL)
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