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.Microsemi .COM
SCOTTSDALE 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 appli cation s.
DO-35
(DO-204AH)
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
FEATURES
APPLIC ATIONS / BENEFITS
• JEDEC registered 1N746 thr u 1N759A and 1N4370
thru 1N4372A series
• Internal metallurgical bond option available by adding a
“-1” suffix similar to military devices
• Commercial Surface Mount equiv alents available as
MLL746 to MLL759A and MLL4370 to MLL4372A
including the “-1” suffix in the DO-213AA ME LF style
package (consult factory for others)
• RoHS Compliant devices avai lable 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 RAT ING S
MECHANICAL AND PACKAGING
• Operating and Storage temperature: -65ºC to +175ºC
• Thermal Resistance: 250 ºC/W junction to lead at 3/8
(10 mm) lead length from body, or 310ºC/W junction to
ambient when mounted on FR4 PC board (1 oz Cu)
with 4 mm2 cop per pads and track width 1 mm, length
25 mm
• Steady-State Power: 0.5 watts at TL < 50oC 3/8 inch
(10 mm) from body or 0.48 W at TA < 25ºC when
mounted on FR4 PC board as described for thermal
resistance above (also see F igure1)
• Forward voltage @200 mA: 1.1 volts
• Solder Temperatures: 260 ºC 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 l ast page
Silicon 500 mW Zener Diodes
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N746 thru 1N759A, -1, e3 and
1N4370 thru 1N4372A, -1, e3 DO-35
1N746 - 759A, e3
1N4370- 4372A, e3 (DO-35)
ELECTRICAL CHARACTERISTICS* @ 25oC MAXIMUM REVERSE
CURRENT IR
@ VR = 1 VOLT
NOMINAL
ZENER
VOLTAGE
VZ @ IZT
(NOTE 2)
ZENER
TEST
CURRENT
IZT
MAXIMUM
ZENER
IMPEDANCE
ZZT @ IZT
(NOTE 3)
@25ºC
@+150ºC
MAXIMUM
ZENER
CURRENT
IZM
(NOTE 4)
TYPICAL
TEMP COEFF.
OF ZENER
VOLTAGE
αVZ
JEDEC
TYPE NO.
(NOTE1) VOLTS mA OHMS μA μA mA %/oC
1N4370
1N4371
1N4372
2.4
2.7
3.0
20
20
20
30
30
29
100
75
50
200
150
100
150
135
120
-.085
-.080
-.075
1N746
1N747
1N748
3.3
3.6
3.9
20
20
20
28
24
23
10
10
10
30
30
30
110
100
95
-.066
-.058
-.046
1N749
1N750
1N751
1N752
4.3
4.7
5.1
5.6
20
20
20
20
22
19
17
11
2
2
1
1
30
30
20
20
85
75
70
65
-.033
-.015
+/-.010
+.030
1N753
1N754
1N755
1N756
6.2
6.8
7.5
8.2
20
20
20
20
7
5
6
8
.1
.1
.1
.1
20
20
20
20
60
55
50
45
+.049
+.053
+.057
+.060
1N757
1N758
1N759
9.1
10.0
12.0
20
20
20
10
17
30
.1
.1
.1
20
20
20
40
35
30
+.061
+.062
+.062
* JEDEC Registered Data
NOTE 1: Standard tolerance on JEDEC types shown is +/- 10%. Suffix letter A denotes +/- 5% tolerance; suffix
letter C denotes +/- 2%; and suffix letter D denotes +/- 1% tolerance.
NOTE 2: Voltage measurements to be performed 20 seconds after application of dc test current.
NOTE 3: Zener impedance derived by superimposing on IZT, a 60 cps, rms ac current equal to 10% IZT (2mA ac). See MicroNote 202 for
typical zener Impedance variation with different operating currents.
NOTE 4: Allowance has been made for the increase in VZ due to ZZ and for the increase in junction temperature as the unit approaches
thermal equilibrium at the power dissipation of 400 mW.
GRAPHS
TEMPERATURE COEFFICIENT mV/oC
RATED POWER DISSIPATION - mW
TEMPERATURE COEFFICIENT
T
L – LEAD TEMPERATURE (oC) 3/8” FROM BODY or NOMINAL ZENER VOLTAGE (VOLTS)
TA on FR4 PC BOARD
FIGURE 1 FIGURE 2
POWER DERATING CURVE ZENER VOLTAGE TEMPERATURE
COEFFICIENT vs. ZENER VOLTAGE
Microsemi
Scottsdale Division Page 2
Copyright © 2005
10-18-2005 REV C 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Silicon 500 mW Zener Diodes
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N746 thru 1N759A, -1, e3 and
1N4370 thru 1N4372A, -1, e3 DO-35
1N746 - 759A, e3
1N4370- 4372A, e3 (DO-35)
PACKAGE DIMEN SIONS
All dimensions in: INCH
mm
FIGURE 3
CAPACITANCE vs. ZENER VOLTAGE
(TYPICAL)
Microsemi
Scottsdale Division Page 3
Copyright © 2005
10-18-2005 REV C 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
