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SCOTTSDALE DIVISION
1N4728UR thru 1N4764AUR,e3
(or MLL4728A thru MLL4764A,e3)
SURFACE MOUNT 1.0 W
GLASS ZENER DIODES
DESCRIPTION
This surface mountable 1 watt Zener diode series is electrically equivalent to
the 1N4728A thru 1N4764A registration in the DO-41 equivalent package
except that it meets the JEDEC surface mount outline DO-213AB. It is an
ideal selection for applications of high density and low parasitic requirements
for voltage regulation. Standard voltage tolerance is +/- 5% with tighter
tolerances available down to 1%. With its glass hermetic qualities, it may
also be used for high reliability applications when required by a source
control drawing (SCD).
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
APPEARANCE
DO-213AB
FEATURES
Electrically similar to the JEDEC registered 1N4728 thru
1N4764 zener series
Zener voltages available 3.3V to 100V
Standard voltage tolerances are +/- 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
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 also available as SMAJ4728A
to SMAJ4764A and SMAJ4728A to SMAJ4764A
RoHS Compliant devices also available by adding e3 suffix
Plastic body axial-leaded Zener equivalents are also
available as 1N4728A to 1N4764A
APPLICATIONS / BENEFITS
Regulates voltage over a broad operating current
and temperature range
Wide selection from 3.3 to 100 V
Leadless package for surface mounting
Ideal for high density mounting
Nonsensitive to ESD
Hermetically sealed glass package
Specified capacitance (see Figure 2)
Inherently radiation hard per MicroNote 050
MAXIMUM RATINGS
Power dissipation at 25ºC: 1.0 watts (also see derating
in Figure 1).
Operating and Storage temperature: -65ºC to +175ºC
Thermal Resistance: 50 ºC/W junction to end cap, or
130ºC/W junction to ambient when mounted on FR4 PC
board (1 oz Cu) with recommended footprint (see last
page)
Steady-State Power: 1.00 watts at TEC < 125oC, or 1.00
watts at TA < 45ºC when mounted on FR4 PC board and
recommended footprint as described for thermal
resistance (also see Figure 1)
Forward voltage @200 mA: 1.2 volts (maximum)
Solder Temperatures: 260 ºC for 10 s (max)
MECHANICAL AND PACKAGING
CASE: Hermetically sealed DO-213AB glass MELF
TERMINALS: Tin-Lead or RoHS Compliant
annealed matte-Tin plating 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: Cathode band only
TAPE & REEL optional: Standard per EIA-481-B
with 12 mm tape, 1500 per 7 inch reel or 5000 per
13 inch reel (add “TR” suffix to part number)
WEIGHT: 0.05 grams
See package dimensions & recommended mounting
pad on last page
Copyright © 2005
10-18-2005 REV D
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1

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SCOTTSDALE DIVISION
1N4728UR thru 1N4764AUR,e3
(or MLL4728A thru MLL4764A,e3)
SURFACE MOUNT 1.0 W
GLASS ZENER DIODES
ELECTRICAL CHARACTERISTICS @ TC = 30oC
TYPE
NUMBER
(NOTE 1 & 5)
1N4728AUR
1N4729AUR
1N4730AUR
1N4731AUR
1N4732AUR
1N4733AUR
1N4734AUR
1N4735AUR
1N4736AUR
1N4737AUR
1N4738AUR
1N4739AUR
1N4740AUR
1N4741AUR
1N4742AUR
1N4743AUR
1N4744AUR
1N4745AUR
1N4746AUR
1N4747AUR
1N4748AUR
1N4749AUR
1N4750AUR
1N4751AUR
1N4752AUR
1N4753AUR
1N4754AUR
1N4755AUR
1N4756AUR
1N4757AUR
1N4758AUR
1N4759AUR
1N4760AUR
1N4761AUR
1N4762AUR
1N4763AUR
1N4764AUR
NOTE 1:
NOTE 2:
NOTE 3:
NOTE 4:
NOTE 5:
MAXIMUM MAXIMUM
MAXIMUM
MAXIMUM
MAXIMUM
ZENER
TEST
DYNAMIC REVERSE
TEST REGULATOR
KNEE
TEST
(SURGE)
VOLTAGE
(NOTE 4)
VZ
Volts
CURRENT
IZT
mA
IMPEDANCE
(Note 2)
ZZT @ IZT
Ohms
CURRENT
IR @ VR
μA
VOLTAGE
VR
Volts
CURRENT
TA = 50oC
IZM
mA
IMPEDANCE
(NOTE2)
ZZK @ IZK
Ohms
CURRENT
IZK
mA
CURRENT
(NOTE 3)
IS
mA
3.3 76
10
100
1
276
400 1.0 1380
3.6 69
10
100
1
252
400 1.0 1260
3.9 64
9
50 1 234 400 1.0 1190
4.3 58
9
10 1 217 400 1.0 1070
4.7 53
8
10 1 193 500 1.0 970
5.1 49
7
10 1 178 550 1.0 890
5.6 45
5
10 2 162 600 1.0 810
6.2 41
2
10 3 146 700 1.0 730
6.8 37
3.5
10
4
133
700 1.0 660
7.5 34
4.0
10
5
121
700 0.5 605
8.2 31
4.5
10
6
110
700 0.5 550
9.1 28
5.0
10
7
100
700 0.5 500
10 25
7
10 7.6
91
700 0.25 454
11 23
8
5 8.4 83
700 0.25 414
12 21
9
5 9.1 76
700 0.25 380
13 19
10
5 9.9 69
700 0.25 344
15 17
14
5 11.4 61
700 0.25 304
16 15.5
16
5 12.2 57
700 0.25 285
18 14
20
5 13.7 50
750 0.25 250
20 12.5
22
5 15.2 45
750 0.25 225
22 11.5
23
5 16.7 41
750 0.25 205
24 10.5
25
5 18.2 38
750 0.25 190
27 9.5
35
5 20.6 34
750 0.25 170
30 8.5
40
5 22.8 30
1000 0.25 150
33 7.5
45
5 25.1 27
1000 0.25 135
36 7.0
50
5 27.4 25
1000 0.25 125
39 6.5
60
5 29.7 23
1000 0.25 115
43 6.0
70
5 32.7 22
1500 0.25 110
47 5.5
80
5 35.8 19
1500
0.25
95
51 5.0
95
5 38.8 18
1500
0.25
90
56 4.5
110
5 42.6 16
2000
0.25
80
62 4.0
125
5 47.1 14
2000
0.25
70
68 3.7
150
5 51.7 13
2000
0.25
65
75 3.3
175
5 56.0 12
2000
0.25
60
82 3.0
200
5 62.2 11
3000
0.25
55
91 2.8
250
5 69.2 10
3000
0.25
50
100 2.5
350
5 76.0
9
3000
0.25
45
The type numbers shown with an “A” suffix have a +/-5% tolerance on the nominal Zener voltage. Also available with suffix “C” for +/-2%, and
“D” for +/-1%, while the absence of a suffix letter denotes +/- 10% tolerance.
The Zener impedance is derived from the 60Hz ac voltage, which 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.
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.
Voltage measurements to be performed 90 seconds after application of dc current.
This product series has also been previously identified as the MLL4728A thru MLL4764A series. This alternate name may still be used.
Copyright © 2005
10-18-2005 REV D
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2

No Preview Available !

SCOTTSDALE DIVISION
1N4728UR thru 1N4764AUR,e3
(or MLL4728A thru MLL4764A,e3)
SURFACE MOUNT 1.0 W
GLASS ZENER DIODES
GRAPHS
STEADY-STATE POWER DERATING
TEC
TA
Temperature (oC)
FIGURE 1
Power Derating Curve Where TEC is End Cap Temp
and TA is Ambient Temperature on FR4 PC board.
PACKAGE DIMENSIONS
FIGURE 2
INCHES
DIM MIN
MAX
A 0.094 0.105
B 0.189 0.205
C 0.016 0.022
MILLIMETERS
MIN MAX
2.39 2.66
4.80 5.20
0.41 0.55
PAD LAYOUT
INCHES
mm
A .276
7.00
B 0.070
1.8
C 0.110
2.8
Copyright © 2005
10-18-2005 REV D
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3