METALLURGICALLY BONDED GLASS
SURFACE MOUNT 1.0 W ZENERS
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N4728UR-1 thru 1N4764AUR-1,e3
(or MLL4728A-1 thru MLL4764A-1,e3)
1N4728AUR-1 thru
1N4764AUR-1
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 and also
includes enhanced internal contact design. 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 APPLIC ATIONS / BENEFITS
• Electrically similar to the JEDEC registered 1N4728
thru 1N4764 zener series • Regulates voltage over a broad op erating current
and temperature range
• Zener voltages availabl e 3.3V to 100V • Metallurgically enhanced internal contact design fro
greater reliability and lower thermal resistance
• Standard voltage toleranc es are +/- 5% with “A” suffix
and 10 % with no suffix identif ication • Wide selection from 3.3 to 100 V
• Tight tolerances available in plus or minus 2% or 1%
with C or D suffix respectively • Leadless package for surfac e mounting
• Ideal for high density mounting
• 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.
• Nonsensitive to ESD
• Hermetically sealed glass package
• Specified capacitance (see Figure 2)
• Inherently radiation hard per MicroNote 050
• Surface mount equivalents also avai lable as
SMAJ4728A to SMAJ4764A and SMAJ4728A to
SMAJ4764A
• RoHS Compliant devices avai lable by adding “e3” suffix
• Plastic body axial-leaded Zener equivalents are also
available as 1N4728A to 1N476 4A
MAXIMUM RAT ING S MECHANICAL AND PACKAGING
Microsemi
Scottsdale Division Page 1
Copyright © 2005
10-18-2005 REV A
,
e3
• Power dissipation at 25º• CASE: Hermetically sealed DO-213AB glass MELF
C: 1.0 watts (also see derating
in Figure 1). • TERMINALS: Tin-Lead (Sn/Pb) or RohS Compliant
annealed matte-Tin plating solderable per MIL-STD-
750, method 2026
• Operating and Storage temperature: -65ºC to +175ºC
• Thermal Resistance: 40 ºC/W junction to en d cap, or
120º• POLARITY: Cathode indicated by band. Diode to
be operated with the banded end positive with
respect to the opposite end for Zener regulation
C/W junction to ambient when mounted on FR4 PC
board (1 oz Cu) with recommended footprint (see last
page) o• MARKING: Cathode band only
• Steady-State Power: 1.00 watts at TEC < 135 C, or
1.00 watts at TA < 55ºC when mounted on FR4 PC
board and recommended footprint as described for
thermal resistance (also see Figure 1)
• 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)
• Forward voltage @200 mA: 1.2 volts (maximum) • WEIGHT: 0.05 grams
• Solder Temperatures: 260 ºC for 10 s (max) • See package dimensions & recommended mounting
pad on last page
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
METALLURGICALLY BONDED GLASS
SURFACE MOUNT 1.0 W ZENERS
Microsemi
Scottsdale Division Page 2
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Copyright © 2005
10-18-2005 REV A
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N4728UR-1 thru 1N4764AUR-1,e3
(or MLL4728A-1 thru MLL4764A-1,e3)
1N4728AUR-1 thru
1N4764AUR-1
,
e3
ELECTRICAL CHARACTERISTICS @ TC = 30oC
ZENER
VOLTAGE
(NOTE 4)
VZ
TEST
CURRENT
IZT
MAXIMUM
DYNAMIC
IMPEDANCE
(Note 2)
ZZT @ IZT
MAXIMUM
REVERSE
CURRENT
IR @ VR
TEST
VOLTAGE
VR
MAXIMUM
REGULATOR
CURRENT
TA = 50oC
IZM
MAXIMUM
KNEE
IMPEDANCE
(NOTE2)
ZZK @ IZK
TEST
CURRENT
IZK
MAXIMUM
(SURGE)
CURRENT
(NOTE 3)
IS
TYPE
NUMBER
(NOTE 1 & 5) Volts mA Ohms μA Volts mA Ohms mA mA
1N4728AUR-1
1N4729AUR-1
1N4730AUR-1
1N4731AUR-1
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-1
1N4733AUR-1
1N4734AUR-1
1N4735AUR-1
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-1
1N4737AUR-1
1N4738AUR-1
1N4739AUR-1
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-1
1N4741AUR-1
1N4742AUR-1
1N4743AUR-1
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-1
1N4745AUR-1
1N4746AUR-1
1N4747AUR-1
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-1
1N4749AUR-1
1N4750AUR-1
1N4751AUR-1
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-1
1N4753AUR-1
1N4754AUR-1
1N4755AUR-1
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-1
1N4757AUR-1
1N4758AUR-1
1N4759AUR-1
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-1
1N4761AUR-1
1N4762AUR-1
1N4763AUR-1
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-1 100 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. It is also available with suffix
“C” for +/-2%, and “D” for +/-1%. 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 (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.
NOTE 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.
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-1 thru MLL4764A-1 series. This alternate name may
still be used.
METALLURGICALLY BONDED GLASS
SURFACE MOUNT 1.0 W ZENERS
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N4728UR-1 thru 1N4764AUR-1,e3
(or MLL4728A-1 thru MLL4764A-1,e3)
1N4728AUR-1 thru
1N4764AUR-1
GRAPHS
STEADY-STATE POWER DERATING
Power Dissipation (WATTS)
TEC
TA
D
P
Temperature (oC) FIGURE 2
FIGURE 1
Power Derating Curve Where T is End Cap Temp
EC
and TA is Ambient Temperature on FR4 PC board.
PACKAGE DIMEN SIONS
Microsemi
Scottsdale Division Page 3
Copyright © 2005
10-18-2005 REV A
,
e3
INCHES MILLIMETERS INCHES mm
PAD LAYOUT
DIM MIN MAX MIN MAX A .276 7.00
A 0. 094 0.105 2.39 2.66 B 0.070 1.8
B 0. 189 0.205 4.80 5.20 C 0.110 2.8
C 0.016 0.022 0.41 0.55
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
