
Silicon 500 mW Zener Diodes
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
Copyright
2005
10-18-2005 REV C
WWW
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.CO
M
S C O T TS DALE DIVISION
1N746 thru 1N759A, -1, e3 and
1N4370 thru 1N4372A, -1, e3 DO-35
1N746
-
759A,
e3
1N4370-
4372A,
e3
(DO-35)
DESCRIPTION
APPEARANCE
The popular 1N746 thru 1N759A and 1N4370 thru 1N4372A series of 0.5
watt Zener Voltage Regulators provides a selection from 2.4 to 12 volts in
standard 5% or 10% tolerances as well as tighter tolerances identified by
different suffix letters on the part number. These glass axial-leaded DO-35
Zeners are also available with an internal-metallurgical-bond option by
adding a “-1” suffix as well as RoHS Compliant by adding an “e3” suffix.
Microsemi also offers numerous other Zener products to meet higher and
lower power applications.
DO-35
(DO-204AH)
FEATURES
APPLICATIONS / BENEFITS
JEDEC registered 1N746 thru 1N759A and 1N4370
thru 1N4372A series
Internal metallurgical bond option available by adding a
“-1” suffix similar to military devices
Commercial Surface Mount equivalents available as
MLL746 to MLL759A and MLL4370 to MLL4372A
including the “-1” suffix in the DO-213AA MELF style
package (consult factory for others)
RoHS Compliant devices available by adding “e3” suffix
DO-7 glass body axial-leaded Zener equivalents are
also available
Regulates voltage over a broad operating
current and temperature range
Selection from 2.4 to 12 V
Standard voltage tolerances are plus/minus 5%
with A suffix identification and 10 % with no suffix
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
Minimal capacitance (see Figure 3)
Inherently radiation hard as described in Microsemi
MicroNote 050
MAXIMUM RATINGS
MECHANICAL AND PACKAGING
Operating and Storage temperature: -65C to +175C
Thermal Resistance: 250 C/W junction to lead at 3/8
(10 mm) lead length from body, or 310
C/W junction to
ambient when mounted on FR4 PC board (1 oz Cu)
with 4 mm
2 copper pads and track width 1 mm, length
25 mm
Steady-State Power: 0.5 watts at T
L < 50
oC 3/8 inch
(10 mm) from body or 0.48 W at TA < 25
C when
mounted on FR4 PC board as described for thermal
resistance above (also see Figure1)
Forward voltage @200 mA: 1.1 volts
Solder Temperatures: 260 C for 10 s (max)
CASE: Hermetically sealed axial-lead glass
DO-35 (DO-204AH) package
TERMINALS: Tin-Lead or RoHS Compliant
annealed matte-Tin plating 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: 0.2 grams
See package dimensions on last page