1N5518BUR-1 thru 1N5546BUR-1
Qualified Levels:
Low Voltage Avalanche
JAN, JANTX and
Available on
500 mW Zener Diodes
commercial JANTXV
versions
Qualified per MIL-PRF-19500/437
DESCRIPTION
The 1N5518BUR-1 thru 1N5546BUR-1 series of 0.5 watt glass surface mount Zener voltage
regulators provides a selection from 3.3 to 33 volts with tolerances ranging from plus/minus
1% to 20%. The standard tolerance is plus/minus 5% with the B suffix unless ordered
otherwise. These glass surface mount devices are available with an internal metallurgical
bond option. This type of bonded Zener package construction is also in JAN, JANTX, and
JANTXV military qualifications. Microsemi also offers numerous other Zener products to meet
higher and lower power applications.
DO-213AA MELF
Package
Important: For the latest information, visit our website 1N5518BUR-1 thru 1N5546BUR-1
MECHANICAL and PACKAGING
CASE: Hermetically sealed glass DO-213AA (SOD80 or MLL34) MELF style package.
TERMINALS: End caps tin-lead plated or RoHS compliant matte-Tin plating available (on commercial only) solderable per MIL-
STD-750, method 2026.
POLARITY: Cathode indicated by band where diode is to be operated with the banded end positive with respect to the opposite
end for Zener regulation.
o
MOUNTING SURFACE SELECTION: The Axial Coefficient of Expansion (COE) of this device is approximately +6 PPM/ C. The
COE of the Mounting Surface System should be selected to provide a suitable match with this device.
MARKING: cathode band only.
TAPE & REEL option: Standard per EIA-481-1-A with 12 mm tape (add TR suffix to part number). Consult factory for quantities.
WEIGHT: 0.04 grams.
See Package Dimensions on last page.
PART NOMENCLATURE
JAN 1N5518 B UR -1 (e3)
Reliability Level RoHS Compliance
JAN = JAN Level e3 = RoHS compliant (available
JANTX = JANTX Level on commercial grady only)
JANTXV = JANTXV Level Blank = non-RoHS compliant
Blank = Commercial
Metallurgical Bond
JEDEC type number
-1 = Metallurgical bond
See Electrical Characteristics
table
Package type
UR = surface mount
Zener Voltage Tolerance
A = 10%
B = 5%
C = 2%
D = 1%
Blank = 20%
SYMBOLS & DEFINITIONS
Symbol Definition
I Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and temperature.
R
I , I , I Regulator Current: The dc regulator current (I ), at a specified test point (I ), near breakdown knee (I ).
Z ZT ZK Z ZT ZK
I Low Regulator (Zener) Current: The lowest rated dc current for the specified power rating.
ZL
I Maximum Regulator (Zener) Current: The maximum rated dc current for the specified power rating.
ZM
V Zener Voltage: The zener voltage the device will exhibit at a specified current (I ) in its breakdown region.
Z Z
Voltage Regulation: The change in zener voltage between two specified currents or percentage of I .
VZ ZM
Dynamic Impedance: The small signal impedance of the diode when biased to operate in its breakdown region at a
Z or Z
ZT ZK
specified rms current modulation (typically 10% of I or I ) and superimposed on I or I respectively.
ZT ZK ZT ZK
T4-LDS-0037, Rev 2 (111456) 2011 Microsemi Corporation Page 2 of 6