500 mW GLASS SURFACE MOUNT
ZENER DIODES

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.
Microse
m
i
.
CO
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SCOTTSDALE DIVISION
1N5221UR thru 1N5281BUR, e3
(or MLL5221 thru MLL5281B, e3)
1N5
221
UR thru
1N5281
BUR


DESCRIPTION

APPEARANCE

The 1N5221BUR thru 1N5281BUR series of 0.5 watt Zener Voltage
Regulators provides a surface mount equivalent to the popular JEDEC
registered 1N5221B to 1N5281B for 2.4 to 200 volts in standard 5%
tolerances as well as tighter tolerances identified by different suffix letters on
the part number. These are also available with an internal-metallurgical-
bond option by adding a “-1” suffix (see separate data sheet). Microsemi
also offers numerous other Zener products to meet higher and lower power
applications.



DO-213AA
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com


FEATURES

APPLICATIONS / BENEFITS
• Surface mount equivalents to the JEDEC registered
1N5221 thru 1N5281B series
• Hermetically sealed surface mount package
• RoHS Compliant devices available by adding “e3” suffix
• Internal metallurgical bond option available by adding a
“-1” suffix (see separate data sheet for same part
numbers with “-1” suffix)
• DO-7 or DO-35 glass body axial-leaded Zener
equivalents also available per JEDEC registration (see
separate data sheet for part numbers 1N5221 thru
1N5281B series


• Regulates voltage over a broad operating
current and temperature range
• Selection from 2.4 to 200 V
• Standard voltage tolerances are plus/minus 5%
with B suffix identification and 10 % with A suffix
• Tight tolerances available in plus or minus 2%
or 1% with C or D suffix respectively
• Nonsensitive to ESD per MIL-STD-750 Method 1020
• Minimal capacitance (see Figure 3)
• Inherently radiation hard as described in Microsemi
MicroNote 050

MAXIMUM RATINGS

MECHANICAL AND PACKAGING
• Operating and Storage temperature: -65
º
C to +175
º
C
• Thermal Resistance: 150
º
C/W junction to end cap
and 300
º
C/W junction to ambient when mounted on
FR4 PC board (1 oz Cu) with recommended footprint
(see last page)
• Steady-State Power: 0.5 watts at end cap
temperature T
EC
< 100
o
C or ambient temperature T
A
< 25
º
C when mounted on FR4 PC board as described
for thermal resistance above (see Figure 2 for
derating)
• Forward voltage @200 mA: 1.1 volts (maximum)
• Solder Temperatures: 260
º
C for 10 seconds (max)

• CASE: Hermetically sealed glass DO-213AA
(SOD80 or MLL34) MELF style package
• FINISH: End caps Tin-Lead or RoHS Compliant
annealed matte-Tin plating 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
• MARKING: cathode band only
• TAPE & REEL option: Standard per EIA-481-B with
12 mm tape, 2000 per 7 inch reel or 5000 per 13
inch reel (add “TR” suffix to part number)
• WEIGHT: 0.04 grams
• See package dimensions on last page




Microsemi
Scottsdale Division
Page 1
Copyright © 2005
8-29-2005 REV B
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503