1N5518B thru 1N5546B-1
Qualified Levels:
Low Voltage Avalanche
JAN, JANTX and
Available on
500 mW Zener Diodes DO-35
JANTXV
commercial
versions
Qualified per MIL-PRF-19500/437
DESCRIPTION
The 1N5518 thru 1N5546 series of 0.5 watt axial-leaded glass 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
axial-leaded glass DO-35 Zeners are also available with an internal metallurgical bond option.
This type of bonded Zener package construction is also available in JAN, JANTX, and
JANTXV military qualifications. Microsemi also offers numerous other Zener products to meet
higher and lower power applications.
Important: For the latest information, visit our website 1N5518B thru 1N5546B-1
MECHANICAL and PACKAGING
CASE: Hermetically sealed axial-lead glass DO-35 (DO-204AH) package.
TERMINALS: Leads, tin-lead plated solderable per MIL-STD-750, method 2026. RoHS compliant matte-Tin available for
commercial only.
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.
MARKING: Part number.
TAPE & REEL option: Standard per EIA-296 (add TR suffix to part number). Consult factory for quantities.
WEIGHT: 0.2 grams.
See Package Dimensions on last page.
PART NOMENCLATURE
JAN 1N5518 B -1 (e3)
Reliability Level RoHS Compliance
JAN = JAN Level e3 = RoHS compliant (available
JANTX = JANTX Level on commercial grade only)
JANTXV = JANTXV Level Blank = non-RoHS compliant
Blank = Commercial
Metallurgical Bond
JEDEC type number
-1 = Metallurgical bond
(see Electrical Characteristic
blank = Standard bond
table)
Zener Voltage Tolerance
A = 10%
B = 5%
C = 2%
D = 1%
Blank = 20%
SYMBOLS & DEFINITIONS
Symbol Definition
IR Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and temperature.
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
V Voltage Regulation: The change in zener voltage between two specified currents or percentage of I .
Z 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-0037-1, Rev 1 (111456) 2011 Microsemi Corporation Page 2 of 5