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
Glass Diode Series Reliability & Qualification Data
This is the reliability and qualification data for the glass axial lead and surface mount Zener,
rectifier and Schottky series.
Features Mechanical
JAN/JANTX/JANTXV available for most Hermetically sealed, double slug glass
Voltage range: 1.8 to 200 Volts Tin-Lead Plating
.25 – 1.0 watt power rating DO-7, DO-35, DO-41, DO-213AA, DO-213AB
Low noise, Low leakage and Cathode indicated by band
Tight tolerance available Metallurgical bond available
Maximum Ratings
Opera ting Tem p eratu re s: - 6 5° C to 200° C
Storage Tem pera ture: - 65° C to 200° C
Stress Results
Moisture Classification Level 1 Package - No Drypack Required
Hermetically sealed
ESD Sensitivity Non-sensitive – No special handling required
Estimated FIT 0.3 90% confidence, 70° C operating, 0.7 eV
Temperature Cycle 0/39936@ 20 temp. cycles (-55° C to 175° C)
Stead y State Lif e 0/83704 @ 25° C – Tj 150° (1000)
High Temperature Storage 0/675 @ 175° C (1000 Hours)
GLASS1101
John Freeman
Director of Engineering
Bill Jones
Director of Quality Control and
Reliability Assurance
The following series are covered: 1N4370-4372, 1N746-1N759, 1N962-1N992, 1N4099-
1N4135, 1N4614-1N4627, 1N4678-1N4717, 1N4728-1N4764, 1N5221-1N5281, 1N5518-
SCOTTSDALE DIVISION
1N5546, 1N5817, 1N5819, 1N5728-1N5757, 1N5913-1N5956, 1N5985-1N6031, 1N4001–
1N4006 and all MLL, DL, UR AND –1 versions.