SURFACE MOUNT 1.0 W
GLASS ZENER DIODES
S C O T T S D A L E D I V I S I O N
1N4728UR thru 1N4764AUR
(or MLL4728A thru MLL4764A)
W
W
W
.
Mi
c
r
o
s
e
m
i
.
C
O
M
1N4
728
AUR thru
1N4
764
AUR
DESCRIPTION
APPEARANCE
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).
DO-213AB
IMPORTANT: For the most current data, consult MICROSEMI's website:
http://www.microsemi.com
FEATURES
APPLICATIONS / BENEFITS
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
Plastic body axial-leaded Zener equivalents are also
available as 1N4728A to 1N4764A
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
MECHANICAL AND PACKAGING
Power dissipation at 25
C: 1.0 watts (also see derating
in Figure 1).
Operating and Storage temperature: -65
C to +175
C
Thermal Resistance: 50
C/W junction to end cap, or
130
C/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 T
EC
< 125
o
C, or
1.00 watts at T
A
< 45
C 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
C for 10 s (max)
CASE: Hermetically sealed DO-213AB glass MELF
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: 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
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
Copyright
2002
11-05-2003 REV C
SURFACE MOUNT 1.0 W
GLASS ZENER DIODES
S C O T T S D A L E D I V I S I O N
1N4728UR thru 1N4764AUR
(or MLL4728A thru MLL4764A)
W
W
W
.
Mi
c
r
o
s
e
m
i
.
C
O
M
1N4
728
AUR thru
1N4
764
AUR
ELECTRICAL CHARACTERISTICS @
T
C
= 30
o
C
ZENER
VOLTAGE
(NOTE 4)
V
Z
TEST
CURRENT
I
ZT
MAXIMUM
DYNAMIC
IMPEDANCE
(Note 2)
Z
ZT
@ I
ZT
MAXIMUM
REVERSE
CURRENT
I
R
@ V
R
TEST
VOLTAGE
V
R
MAXIMUM
REGULATOR
CURRENT
T
A
= 50
o
C
I
ZM
MAXIMUM
KNEE
IMPEDANCE
(NOTE2)
Z
ZK
@ I
ZK
TEST
CURRENT
I
ZK
MAXIMUM
(SURGE)
CURRENT
(NOTE 3)
I
S
TYPE
NUMBER
(NOTE 1 & 5)
Volts mA
Ohms
A
Volts mA
Ohms mA mA
1N4728AUR
1N4729AUR
1N4730AUR
1N4731AUR
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
1N4732AUR
1N4733AUR
1N4734AUR
1N4735AUR
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
1N4736AUR
1N4737AUR
1N4738AUR
1N4739AUR
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
1N4740AUR
1N4741AUR
1N4742AUR
1N4743AUR
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
1N4744AUR
1N4745AUR
1N4746AUR
1N4747AUR
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
1N4748AUR
1N4749AUR
1N4750AUR
1N4751AUR
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
1N4752AUR
1N4753AUR
1N4754AUR
1N4755AUR
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
1N4756AUR
1N4757AUR
1N4758AUR
1N4759AUR
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
1N4760AUR
1N4761AUR
1N4762AUR
1N4763AUR
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
1N4764AUR
100 2.5 350 5 76.0 9 3000 0.25 45
NOTE 1: 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.
NOTE 2: 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 (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.
NOTE 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
.
NOTE 4: Voltage measurements to be performed 90 seconds after application of dc current.
NOTE 5: This product series has also been previously identified as the MLL4728A thru MLL4764A series. This alternate name may still be used.
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
Copyright
2002
11-05-2003 REV C
PDF 
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