VOIDLESS-HERMETICALLY-SEALED
SURFACE MOUNT 1.5 WATT GLASS
ZENER DIODES
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N4460US thru 1N4496US
1N6485US thru 1N6491US
1N4460US thru 1N4496US
1N6485US thru 1N6491US
DESCRIPTION APPEARANCE
This surface mount Zener Voltage Regulator series is military qualified to MIL-
PRF-19500/406 and is ideal for high-reliability applications where a failure
cannot be tolerated. These industry-recognized 1.5 Watt Zener Voltage
Regulators are hermetically sealed with voidless-glass construction using an
internal metallurgical bond. It includes Zener selections from 3.3 to 200 volts in
standard 5% tolerances as well as tighter tolerances identified by different
suffix letters on the part number. They are also available in axial-leaded
packages (see separate data sheet for 1N4460 thru 1N4496 and 1N6485 thru
1N6491). Microsemi also offers numerous other Zener products to meet higher
and lower power ratings in both thru-hole and surface mount packa ges.
“A” Package
(or “D-5A”)
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
FEATURES APPLIC ATIONS / BENEFITS
• Popular JEDEC registered series
• Voidless hermetically s ealed glass package
• Triple-layer passivation
• Internal “Category I” Metallurgical bonds for 1N4462US
thru 1N4496US and “Category III” for 1N6485US thru
1N6491US as well as 1N4460US and 1N4461US
• JAN, JANTX, JANTXV, and JANS available per MIL-
PRF-19500/406
• Axial-leaded e quivalents also available (see separate
data sheet for 1N4460 thru 1N4496 and 1N6485 thru
1N6491)
• Regulates voltage over a broad op erating current
and temperature range
• Extensive selection from 3.3 to 200 V
• Standard voltage tolerances are plus/minus 5% with
no suffix
• Tight tolerances available in plus or minus 2% or 1%
with C or D suffix respectively
• Extremely robust construction
• Nonsensitive to ESD per MIL-STD-750 Method 1020
• Inherently radiation hard as described in Microsemi
MicroNote 050
MAXIMUM RAT ING S MECHANICAL AND PACKAGING
• Operating Temperature: -65oC to +175oC.
• Storage Temperature: -65oC to +200oC.
• Power Dissipation: 1.5 Watts @ TEC = 145oC
• Thermal Resistance: 20oC/W junction to en d cap
• Thermal Impedance at 10 ms: 4.5oC/W (1N4462US
thru 1N4496US) and 7.5oC/W (1N6485US thru
1N6491US as well as 1N4460US and 1N4461US)
• Forward Voltage: 1.00 V at 200 mA and 1.5 V at 1.0 A
• CASE: Hermetically sealed voidless hard glass with
Tungsten slugs
• TERMINAT IONS: End caps are Tin/Lead (Sn/Pb)
over Silver
• MARKING: None
• POLARITY: Cathode in dicated by band
• Tape & Reel o ption: Stand ard per EIA-481-B
• Weight: 193 mg
ELECTRICAL CHARACTERISTICS @ 25oC
NOMINAL
ZENER
VOLTAGE
VZ
TEST
CURRENT
IZT
MAXIMUM
DYNAMIC
IMPEDANCE
ZZT @ IZT
MAXIMUM KNEE
IMPEDANCE
ZZK @ IZK
MAXIMUM
REVERSE
CURRENT
IR @ VR
MAXIMUM
CONTINUOUS
CURRENT
IZM
MAXIMUM
SURGE
CURRENT
IZSM
TYPE
VOLTS mA OHMS OHMS mA μA VOLTS mA AMPS
1N6485US
1N6486US
1N6487US
1N6488US
1N6489US
1N6490US
1N6491US
3.3
3.6
3.9
4.3
4.7
5.1
5.6
76.0
69.0
64.0
58.0
53.0
49.0
45.0
10
10
9
9
8
7
5
400
400
400
400
500
500
600
1.0
1.0
1.0
1.0
1.0
1.0
1.0
50
50
35
5.0
4.0
1.0
0.5
1.0
1.0
1.0
1.0
1.0
1.0
2.0
433
397
366
332
304
280
255
4.2
3.9
3.6
3.3
3.0
2.7
2.5
Microsemi
Scottsdale Division Page 1
Copyright © 2005
3-16-2005 REV B 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
VOIDLESS-HERMETICALLY-SEALED
SURFACE MOUNT 1.5 WATT GLASS
ZENER DIODES
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N4460US thru 1N4496US
1N6485US thru 1N6491US
1N4460US thru 1N4496US
1N6485US thru 1N6491US
NOMINAL
ZENER
VOLTAGE
VZ
TEST
CURRENT
IZT
MAXIMUM
DYNAMIC
IMPEDANCE
ZZT @ IZT
MAXIMUM KNEE
IMPEDANCE
ZZK @ IZK
MAXIMUM
REVERSE
CURRENT
IR @ VR
MAXIMUM
CONTINUOUS
CURRENT
IZM
MAXIMUM
SURGE
CURRENT
IZSM
TA = 25oC
TYPE
VOLTS mA OHMS OHMS mA μA VOLTS mA AMPS
1N4460US
1N4461US
1N4462US
1N4463US
6.2
6.8
7.5
8.2
40.0
37.0
34.0
31.0
4
2.5
2.5
3
200
200
400
400
1.0
1.0
.5
.5
10.0
5.0
1.0
.50
3.72
4.08
4.50
4.92
230
210
191
174
2.3
2.1
1.9
1.7
1N4464US
1N4465US
1N4466US
1N4467US
9.1
10.0
11.0
12.0
28.0
25.0
23.0
21.0
4
5
6
7
500
500
550
550
.5
.25
.25
.25
.30
.30
.30
.20
5.46
8.00
8.80
9.60
157
143
130
119
1.6
1.4
1.3
1.2
1N4468US
1N4469US
1N4470US
1N4471US
13.0
15.0
16.0
18.0
19.0
17.0
15.5
14.0
8
9
10
11
550
600
600
650
.25
.25
.25
.25
.05
.05
.05
.05
10.40
12.00
12.80
14.40
110
95
90
79
1.1
.95
.90
.79
1N4472US
1N4473US
1N4474US
1N4475US
20.0
22.0
24.0
27.0
12.5
11.5
10.5
9.5
12
14
16
18
650
650
700
700
.25
.25
.25
.25
.05
.05
.05
.05
16.00
17.60
19.20
21.60
71
65
60
53
.71
.65
.60
.53
1N4476US
1N4477US
1N4478US
1N4479US
30.0
33.0
36.0
39.0
8.5
7.5
7.0
6.5
20
25
27
30
750
800
850
900
.25
.25
.25
.25
.05
.05
.05
.05
24.00
26.40
28.80
31.2
48
43
40
37
.48
.43
.40
.37
1N4480US
1N4481US
1N4482US
1N4483US
43.0
47.0
51.0
56.0
6.0
5.5
5.0
4.5
40
50
60
70
950
1000
1100
1300
.25
.25
.25
.25
.05
.05
.05
.25
34.4
37.6
40.8
44.8
33
30
28
26
.33
.30
.28
.26
1N4484US
1N4485US
1N4486US
1N4487US
62.0
68.0
75.0
82.0
4.0
3.7
3.3
3.0
80
100
130
160
1500
1700
2000
2500
.25
.25
.25
.25
.25
.25
.25
.25
49.6
54.4
60.4
65.6
23
21
19
17
.23
.21
.19
.17
1N4488US
1N4489US
1N4490US
1N4491US
91.0
100.0
110.0
120.0
2.8
2.5
2.0
2.0
200
250
300
400
3000
3100
4000
4500
.25
.25
.25
.25
.25
.25
.25
.25
72.8
80.0
88.0
96.0
16
14
13
12
.16
.14
.13
.12
1N4492US
1N4493US
1N4494US
1N4495US
130.0
150.0
160.0
180.0
1.9
1.7
1.6
1.4
500
700
1000
1300
5000
6000
6500
7000
.25
.25
.25
.25
.25
.25
.25
.25
104.0
120.0
128.0
144.0
11
9.5
8.9
7.9
.11
.095
.089
.079
1N4496US 200.0 1.2 1500 8000 .25 .25 160.0 7.2 .072
SYMBOLS & DEFINITI ONS
Symbol Definition
VZ Zener Voltage: The zener vol tage the device will exhibit at a specified current (IZ) in its breakdown region.
IZ, IZT, IZK Regulator Current: The dc regulator current (IZ), at a specified test point (IZT), near breakdown knee (IZK).
ZZT or ZZK Dynamic Impedance: The small signal imp edance of the diode when biased to operate in its breakdown region
at a specified rms current modulation (typically 10% of IZT or IZK) and superimposed on IZT or IZK respectively.
VFMaximum Forward Voltage: The maximum forward voltage the device will exhibit at a specified current.
IRMaximum Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and
temperature.
IZM Maximum Regulator (Zener) Current: The maximum rated dc current for the specified power rating.
IZSM Maximum Zener Surge Current: The nonrepetitive peak value of zener surge current at a specified wave form.
Microsemi
Scottsdale Division Page 2
Copyright © 2005
3-16-2005 REV B 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
VOIDLESS-HERMETICALLY-SEALED
SURFACE MOUNT 1.5 WATT GLASS
ZENER DIODES
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N4460US thru 1N4496US
1N6485US thru 1N6491US
1N4460US thru 1N4496US
1N6485US thru 1N6491US
GRAPHS
FIGURE 1 FIGURE 2
TYPICAL TEMPERATURE POWER TEMPERATURE DERATING CURVE
COEFFICIENT CHARACTERISTICS
PACKAGE DIMENSIONS AND PAD LAYOUT
This Package Outline has also previously been identified as “D-5A”
Note: If mounting requires adhesive separate from the solder, an additional 0.060 inch diameter
contact may be placed in the center between the pads as an optional spot for cement in the
pad layout as shown.
Microsemi
Scottsdale Division Page 3
Copyright © 2005
3-16-2005 REV B 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
