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 © 2005
10-18-2005 REV C
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N4728AP thru 1N4764AP,e3 (PLASTIC)
1N4728AP-1N4764AP,e3
DESCRIPTION APPEARANCE
The popular 1N4728AP thru 1N4764AP series of 1.0 watt Zeners provides
voltage regulation in a selection from 3.3 to 100 volts in 5% tolerances with
other tighter tolerances also available as identified by different suffix letters
in the part number. These plastic encapsulated Zeners are moisture
classified as Level 1 with no dry pack required. They are also available in
various military screening levels by adding a prefix identifier as described in
the Features below. These plastic molded Zeners with a P suffix provide a
lower thermal resistance compared to the glass-body (G suffix) option for
these same JEDEC part numbers. Both package options are available by
Microsemi in RoHS Compliant devices with an “e3” suffix. Microsemi also
offers numerous other Zener products to meet higher and lower power and
test current applications.
DO-41 or
DO-204AL
(
Plastic
)
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
FEATURES APPLIC ATIONS / BENEFITS
• JEDEC registered 1N4728A to 1N476 4A
• 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 MLL476 4A (consult
factory for others)
• RoHS Compliant devices avai lable by adding “e3” suffix
• Regulates voltage over a broad op erating current and
temperature range
• Standard voltage tolerances are plus/minus 5% with
A suffix and 10 % with no suffix identific ation
• 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 RAT ING S MECHANICAL AND PACKAGING
• Power dissipation at 25ºC: 1.0 watts (also see
derating in Figure 1).
• Operating and Storage temperature: -65ºC to
+150ºC
• Thermal Resistance: 45 ºC/W junction to le ad at 3/8
(10 mm) lead length from body, or 105ºC/W junction
to ambient when mounted on FR4 PC board (1 oz
Cu) with 4 mm2 copper pads and track width 1 mm,
length 25 mm
• Steady-State Power: 1.0 watts at TL < 105oC 3/8
inch (10 mm) from body or at TA < 45ºC when
mounted on FR4 PC board as described for thermal
resistance above (also see F igure 1)
• Forward voltage @200 mA: 1.2 volts (maximum)
• Solder Temperatures: 260 ºC for 10 s (max)
• CASE: Void-free transfer molded thermosetting
epoxy body meeting UL94V-0
• TERMINALS: Tin-Lead (Sn/Pb) or RoHS Compliant
annealed matte-Tin plating solderable per MIL-STD-
750, method 2026
• POLARITY: Cathode indicated by band. Dio de 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 l ast page
Silicon 1 Watt Zener Diodes
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N4728AP thru 1N4764AP,e3 (PLASTIC)
1N4728AP-1N4764AP,e3
ELECTRICAL CHARACTERISTICS*
ZENER
VOLTAGE
(Vz)
(Note 4)
TEST
CURRENT
(IZT)
MAXIMUM
DYNAMIC
IMPEDANCE
(ZZT @ IZT)
(Note 2)
MAXIMUM
REVERSE
CURRENT
(IR @ VR)
TEST
VOLTAGE
(VR)
MAXIMUM
REGULATOR
CURRENT
(IZM)
TA = 50oC
MAXIMUM
KNEE
IMPEDANCE
(ZZK @ IZK)
(Note 2)
TEST
CURRENT
(IZK)
MAXIMUM
(SURGE)
CURRENT
(ISM)
(Note 3)
JEDEC
TYPE
NUMBER
(Note 1) VOLTS mA OHMS μA 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 Registere d 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 (IZT or IZK) is superimposed on IZT or IZK. 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 25oC ambient using a ½ square wave or equivalent sine wave pulse 1/120 second duration
superimposed on IZT.
4. Zener voltage (VZ) is measured at TL = 25ºC (+8, -2ºC) and 90 seconds after application of dc current.
Microsemi
Scottsdale Division Page 2
Copyright © 2005
10-18-2005 REV C 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Silicon 1 Watt Zener Diodes
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N4728AP thru 1N4764AP,e3 (PLASTIC)
1N4728AP-1N4764AP,e3
GRAPHS
TEMPERATURE COEFFICIENT mV/oC
RATED POWER DISSIPATION - W
TL
TA on FR4
PC board
TL, LEAD TEMP. (oC) 3/8” from body NOMINAL ZENER VOLTAGE (VOLTS) FIGURE 3
or TA on FR4 PC Board FIGURE 2 Capacitance vs. Voltage for Representative Types
FIGURE 1 Temp. Coeff. vs. Zener Voltage
Power Derating Curve
PACKAGE DIMENSIO NS (DO-41 or DO-204 AL)
Microsemi
Scottsdale Division Page 3
Copyright © 2005
10-18-2005 REV C 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503