SCOTTSDALE DIVISION
www.DataSheet4U.com
1N4728AP thru 1N4764AP (PLASTIC)
Silicon 1 Watt Zener Diodes
DESCRIPTION
The popular 1N4728A thru 1N4764A series of 1.0 watt Zeners provides
voltage regulation in a selection from 3.3 to 100 volts in 5% tolerances with
other tolerances also available as identified by different suffix letters on the
part number. These plastic encapsulated Zeners are moisture classified as
Level 1 with no dry pack required and are also available in various military
screening levels by adding a prefix identifier as also described in the
Features section. Microsemi also offers numerous other Zener products to
www.DataSheet4Um.coemet higher and lower power applications.
APPEARANCE
DO-41 or
DO-204AL
(Plastic)
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
FEATURES
• JEDEC registered 1N4728A to 1N4764A
• Extensive voltage selection from 3.3 to 100 V
• Options for screening in accordance with MIL-
PRF-19500 for JAN, JANTX, JANTXV, and JANS
are available by adding MQ, MX, MV, or MSP
prefixes respectively to part numbers.
• Surface mount equivalents available as
SMAJ4728A to SMAJ4764A and MLL4728A to
MLL4764A (consult factory for others)
APPLICATIONS / BENEFITS
• Regulates voltage over a broad operating current and
temperature range
• Standard voltage tolerances are plus/minus 5% with
A suffix and 10 % with no suffix identification
• Tight tolerances available in plus or minus 2% or 1%
with C or D suffix respectively
• Flexible axial-lead mounting terminals
• Nonsensitive to ESD per MIL-STD-750 Method 1020
• Moisture classification is Level 1 per IPC/JEDEC J-
STD-020B with no dry pack required
MAXIMUM RATINGS
• Power dissipation at 25ºC: 1.0 watts (also see
derating in Figure 1).
• Operating and Storage temperature: -65ºC to
+150ºC
• Thermal Resistance: 45 ºC/W junction to lead at
3/8 (10 mm) lead length from body, or 105ºC/W
junction to ambient when mounted on FR4 PC
board (1 oz Cu) with 4 mm2 copper pads and
track width 1 mm, length 25 mm
• Steady-State Power: 1.0 watts at TL < 105oC 3/8
inch (10 mm) from body or at TA < 45ºC when
mounted on FR4 PC board as described for
thermal resistance above (also see Figure 1)
• Forward voltage @200 mA: 1.2 volts (maximum)
• Solder Temperatures: 260 ºC for 10 s (max)
MECHANICAL AND PACKAGING
• CASE: Void-free transfer molded thermosetting
epoxy body meeting UL94V-0
• TERMINALS: Leads, tin-lead plated solderable per
MIL-STD-750, method 2026
• POLARITY: Cathode indicated by band. Diode 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)
• WEIGHT: 0.7 grams
• See package dimensions on last page
Copyright 2003
7-23-2003 REV A
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
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