1N4460US – 1N4496US and
1N6485US – 1N6491US
VOIDLESS HERMETICALLY SEALED SURFACE
MOUNT 1.5 WATT GLASS ZENER DIODES
Qualified per MIL-PRF-19500/406
DESCRIPTION
T
his surface mount, Zener voltage regulator series is military qualified to MIL-PRF-19500/406
Available on
commercial
versions
Qualified Levels:
JAN, JANTX,
JANTXV and JANS
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 void-less glass
construction using an internal metallurgical bond. It includes Zener selections from 3.3 to 200
volts in standard 5% tolerance. 1% and 2% tolerance versions are also available. 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 latest information, visit our website
http://www.microsemi.com.
FEATURES
•
•
•
•
•
•
•
Surface mount equivalent of popular JEDEC registered series.
Void-less hermetically sealed glass package.
Triple-layer passivation.
Extremely robust construction.
Internal
“Category 1”
metallurgical bonds for 1N4462US thru 1N4496US and “Category
III”
for
1N6485US thru 1N6491US as well as 1N4460US and 1N4461US.
JAN, JANTX, JANTXV and JANS qualifications are available per MIL-PRF-19500/406.
RoHS compliant versions available (commercial grade only).
“A” (D-5A) MELF
Package
Also available in:
DO-41 Package
(axial-lead)
1N4460 – 1N4496 and
1N6485 – 1N6491
APPLICATIONS / BENEFITS
•
•
•
•
•
•
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.
Tighter tolerances available in plus or minus 2% or 1%.
Non-sensitive to ESD per MIL-STD-750 method 1020.
Inherently radiation hard as described in Microsemi
MicroNote 050.
MAXIMUM RATINGS
@ T
A
= 25 C unless otherwise specified
Parameters/Test Conditions
Junction and Storage Temperature
Steady State Power Dissipation @ T
A
= 25 ºC
Thermal Resistance Junction-to-End Cap
1N4462 – 1N4496
Thermal Impedance @ 10 ms
1N6485 – 1N6491
1N4460 – 1N4461
Forward Voltage
@ 200 mA
@ 1.0 A
Solder Temperature @ 10 s
Symbol
T
J
& T
STG
P
D
R
ӨJEC
Z
ӨJX
V
F
T
SP
Value
-65 to +175
1.5
20
Figure 3
Figure 4
Figure 4
1.0
1.5
260
Unit
C
W
o
C/W
ºC/W
o
o
V
o
MSC – Lawrence
6 Lake Street,
Lawrence, MA 01841
Tel: 1-800-446-1158 or
(978) 620-2600
Fax: (978) 689-0803
MSC – Ireland
Gort Road Business Park,
Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044
Fax: +353 (0) 65 6822298
Website:
www.microsemi.com
C
T4-LDS-0183-1, Rev. 1 (120901)
©2012 Microsemi Corporation
Page 1 of 6
1N4460US – 1N4496US and
1N6485US – 1N6491US
MECHANICAL and PACKAGING
•
•
•
•
•
•
•
CASE: Hermetically sealed voidless hard glass with tungsten slugs.
TERMINALS: Tin/lead (Sn/Pb) or RoHS compliant matte/tin (commercial grade only) over copper.
MARKING: Polarity band only.
POLARITY: Cathode indicated by band.
TAPE & REEL option: Standard per EIA-481-B. Consult factory for quantities.
WEIGHT: 193 milligrams.
See
Package Dimensions
on last page.
PART NOMENCLATURE
JAN
Reliability Level
JAN = JAN Level
JANTX = JANTX Level
JANTXV = JANTXV Level
JANS = JANS Level
Blank = Commercial
JEDEC type number
(See
Electrical Characteristics
table)
1N4460 US
C
(e3)
RoHS Compliance
e3 = RoHS compliant (available
on commercial grade only)
Blank = non-RoHS compliant
Tolerance Level
Blank = 5 %
C=2%
D = 1%
MELF Surface Mount
Symbol
V
Z
I
Z
, I
ZT
, I
ZK
Z
ZT
or Z
ZK
V
F
I
R
I
ZM
I
ZSM
SYMBOLS & DEFINITIONS
Definition
Zener Voltage: The Zener voltage the device will exhibit at a specified current (I
Z
) in its breakdown region.
Regulator Current: The dc regulator current (I
Z
), at a specified test point (I
ZT
), near breakdown knee (I
ZK
).
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 I
ZT
or I
ZK
) and superimposed on I
ZT
or I
ZK
respectively.
Maximum Forward Voltage: The maximum forward voltage the device will exhibit at a specified current.
Maximum Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and
temperature.
Maximum Regulator (Zener) Current: The maximum rated dc current for the specified power rating.
Maximum Zener Surge Current: The non-repetitive peak value of Zener surge current at a specified wave form.
T4-LDS-0183-1, Rev. 1 (120901)
©2012 Microsemi Corporation
Page 2 of 6
PCB Design
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