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  Microsemi Electronic Components Datasheet  

1N5545B-1 Datasheet

500mW Zener Diodes

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1N5518B thru 1N5546B-1
Available on
commercial
versions
Low Voltage Avalanche
500 mW Zener Diodes DO-35
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.
Qualified Levels:
JAN, JANTX and
JANTXV
Important: For the latest information, visit our website http://www.microsemi.com.
FEATURES
JEDEC registered 1N5518 thru 1N5546.
Voltage tolerances of plus/minus 20%, 10%, 5%, 2%, and 1% available. See Note 1 on page 3.
Internal metallurgical bond option available with “-1” suffix.
JAN, JANTX, and JANTXV qualification per MIL-PRF-19500/437 available (requires metallurgical
bond option as well as plus/minus 5% voltage tolerance or tighter with B-1, C-1 or D-1 suffix).
RoHS compliant versions available (commercial grade only).
APPLICATIONS / BENEFITS
Regulates voltage over a broad operating current and temperature range.
Guaranteed voltage regulation (VZ) from IZL to IZT.
Voltage selection from 3.3 to 33 V.
Flexible axial-lead mounting terminals.
Nonsensitive to ESD per MIL-STD-750 Method 1020.
Minimal capacitance (see Figure 3).
Inherently radiation hard as described in Microsemi “MicroNote 050” which is available at
Microsemi.com.
DO-35 (DO-204AH)
Package
Also available in:
DO-213AA MELF
(surface mount)
1N5518BUR-1 thru
1N5546BUR-1
MAXIMUM RATINGS
Parameters/Test Conditions
Junction and Storage Temperature
Steady-State Power (Note 1)
(Also see derating in Figure 2)
Thermal Resistance Junction-to-Lead (Note 2)
Thermal Resistance Junction-to-Ambient (Note 3)
Forward Voltage @ 200 mA
Solder Pad Temperature @ 10 s
Symbol
TJ and TSTG
PD
R ӨJL
R ӨJA
VF
T SP
Value
-65 to +175
0.5
250
300
1.1
260
Unit
oC
W
oC/W
oC/W
V
oC
Notes:
1. At TL < 50 oC 3/8 inch (10 mm) from body or 0.48 W at TA < 25 ºC when mounted on FR4 PC board as
described for thermal resistance above.
2. At 3/8 (10 mm) lead length from body.
3. When mounted on FR4 PC board (1 oz Cu) with 4 mm2 copper pads and track width 1 mm, length 25 mm.
MSC – Lawrence
6 Lake Street,
Lawrence, MA 01841
1-800-446-1158
(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
T4-LDS-0037-1, Rev 1 (111456)
©2011 Microsemi Corporation
Page 1 of 5


  Microsemi Electronic Components Datasheet  

1N5545B-1 Datasheet

500mW Zener Diodes

No Preview Available !

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.
Reliability Level
JAN = JAN Level
JANTX = JANTX Level
JANTXV = JANTXV Level
Blank = Commercial
JEDEC type number
(see Electrical Characteristic
table)
Zener Voltage Tolerance
A = 10%
B = 5%
C = 2%
D = 1%
Blank = 20%
PART NOMENCLATURE
JAN 1N5518 B -1 (e3)
RoHS Compliance
e3 = RoHS compliant (available
on commercial grade only)
Blank = non-RoHS compliant
Metallurgical Bond
-1 = Metallurgical bond
blank = Standard bond
Symbol
IR
IZ, IZT, IZK
I ZL
I ZM
VZ
V Z
ZZT or ZZK
SYMBOLS & DEFINITIONS
Definition
Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and temperature.
Regulator Current: The dc regulator current (IZ), at a specified test point (IZT), near breakdown knee (IZK).
Low Regulator (Zener) Current: The lowest rated dc current for the specified power rating.
Maximum Regulator (Zener) Current: The maximum rated dc current for the specified power rating.
Zener Voltage: The zener voltage the device will exhibit at a specified current (IZ) in its breakdown region.
Voltage Regulation: The change in zener voltage between two specified currents or percentage of IZM.
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.
T4-LDS-0037-1, Rev 1 (111456)
©2011 Microsemi Corporation
Page 2 of 5


Part Number 1N5545B-1
Description 500mW Zener Diodes
Maker Microsemi
Total Page 5 Pages
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