VOIDLESS-HERMETICALLY-SEALED 1.5
WATT GLASS ZENER DIODES
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
Copyright 2004
9-28-2004 REV A
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N4460 thru 1N4496
1N6485 thru 1N6491
1N4460 thru 1N4496
1N6485 thru 1N6491
DESCRIPTION APPEARANCE
This 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 surface-mount packages (see separate data sheet
for 1N4460US thru 1N4496US and 1N6485US thru 1N6491US). Microsemi
also offers numerous other Zener products to meet higher and lower power
ratings in both thru-hole and surface mount packages.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
FEATURES APPLICATIONS / BENEFITS
• Popular JEDEC registered series
• Voidless hermetically sealed glass package
• Extremely robust construction
• Triple-layer passivation
• Internal “Category I” Metallurgical bonds for 1N4462
thru 1N4496 and “Category III” for 1N6485 thru 1N6491
as well as 1N4460 and 1N4461.
• JAN, JANTX, JANTXV, and JANS available per MIL-
PRF-19500/406
• Surface mount equivalents also available in a square
end-cap MELF configuration with a “US” suffix (see
separate data sheet for 1N4460US thru 1N4496US and
1N6485US thru 1N6491US)
• Regulates voltage over a broad operating 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
• Flexible axial-lead mounting terminals
• Nonsensitive to ESD per MIL-STD-750 Method 1020
• Inherently radiation hard as described in Microsemi
MicroNote 050
MAXIMUM RATINGS MECHANICAL AND PACKAGING
• Operating Temperature: -65oC to +175oC.
• Storage Temperature: -65oC to +200oC.
• Power Dissipation: 1.5 Watts @ TA = 25oC
• Thermal Resistance: 42oC/W junction to lead at 3/8
inch (10 mm) from body
• Thermal Impedance: 4.5oC/W (1N4462 thru 1N4496)
and 7.5oC/W (1N6485 thru 1N6491 as well as
1N4460 and 1N4461) at 10 ms
• 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
• TERMINATIONS: Axial-leads are Tin/Lead (Sn/Pb)
over Copper
• MARKING: Body painted and part number, etc.
• POLARITY: Cathode indicated by band
• Tape & Reel option: Standard per EIA-296
• Weight: 340 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
1N6485
1N6486
1N6487
1N6488
1N6489
1N6490
1N6491
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
“A” Package
VOIDLESS-HERMETICALLY-SEALED 1.5
WATT GLASS ZENER DIODES
SCOTTSDALE DIVISION
1N4460 thru 1N4496
1N6485 thru 1N6491
WWW.Microsemi .COM 1N4460 thru 1N4496
1N6485 thru 1N6491
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
1N4460
1N4461
1N4462
1N4463
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
1N4464
1N4465
1N4466
1N4467
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
1N4468
1N4469
1N4470
1N4471
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
1N4472
1N4473
1N4474
1N4475
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
1N4476
1N4477
1N4478
1N4479
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
1N4480
1N4481
1N4482
1N4483
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
1N4484
1N4485
1N4486
1N4487
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
1N4488
1N4489
1N4490
1N4491
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
1N4492
1N4493
1N4494
1N4495
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
1N4496 200.0 1.2 1500 8000 .25 .25 160.0 7.2 .072
SYMBOLS & DEFINITIONS
Symbol Definition
VZ Zener Voltage: The zener voltage 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 impedance 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.
VF Maximum Forward Voltage: The maximum forward voltage the device will exhibit at a specified current.
IR Maximum 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
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
Copyright 2004
9-28-2004 REV A
VOIDLESS-HERMETICALLY-SEALED 1.5
WATT GLASS ZENER DIODES
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3
Copyright 2004
9-28-2004 REV A
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N4460 thru 1N4496
1N6485 thru 1N6491
1N4460 thru 1N4496
1N6485 thru 1N6491
GRAPHS
FIGURE 1 FIGURE 2
TYPICAL TEMPERATURE POWER TEMPERATURE DERATING CURVE
COEFFICIENT CHARACTERISTICS
PACKAGE DIMENSIONS
Lead tolerance = +0.002/-0.003 inches
