1N746 thru 1N759A, -1, e3 and
1N4370 thru 1N4372A, -1, e3 DO-35
Silicon 500 mW Zener Diodes
SCOTTSDALE DIVISION
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)
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
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
•
•
•
•
•
•
•
•
MAXIMUM RATINGS
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
MECHANICAL AND PACKAGING
º
•
•
•
•
•
•
•
CASE: Hermetically sealed axial-lead glass
DO-35 (DO-204AH) package
TERMINALS: Tin-Lead or RoHS Compliant
annealed matte-Tin plating solderable per MILSTD-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
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
1N746 - 759A, e3
1N4370- 4372A, e3 (DO-35)
• Operating and Storage temperature: -65 C to +175 C
• 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 copper 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 Figure1)
• Forward voltage @200 mA: 1.1 volts
• Solder Temperatures: 260 ºC for 10 s (max)
º
Copyright © 2005
10-18-2005 REV C
WWW . Microsemi .C OM
DESCRIPTION
1N746 thru 1N759A, -1, e3 and
1N4370 thru 1N4372A, -1, e3 DO-35
Silicon 500 mW Zener Diodes
SCOTTSDALE DIVISION
JEDEC
TYPE NO.
(NOTE1)
1N4370
1N4371
1N4372
1N746
1N747
1N748
1N749
1N750
1N751
1N752
1N753
1N754
1N755
1N756
1N757
1N758
1N759
NOMINAL
ZENER
VOLTAGE
VZ @ IZT
(NOTE 2)
VOLTS
2.4
2.7
3.0
3.3
3.6
3.9
4.3
4.7
5.1
5.6
6.2
6.8
7.5
8.2
9.1
10.0
12.0
ZENER
TEST
CURRENT
IZT
mA
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
MAXIMUM REVERSE
CURRENT IR
@ VR = 1 VOLT
MAXIMUM
ZENER
IMPEDANCE
ZZT @ IZT
(NOTE 3)
OHMS
30
30
29
28
24
23
22
19
17
11
7
5
6
8
10
17
30
MAXIMUM
ZENER
CURRENT
IZM
@25ºC
μA
100
75
50
10
10
10
2
2
1
1
.1
.1
.1
.1
.1
.1
.1
@+150ºC
μA
200
150
100
30
30
30
30
30
20
20
20
20
20
20
20
20
20
(NOTE 4)
mA
150
135
120
110
100
95
85
75
70
65
60
55
50
45
40
35
30
TYPICAL
TEMP COEFF.
OF ZENER
VOLTAGE
αVZ
o
%/ C
-.085
-.080
-.075
-.066
-.058
-.046
-.033
-.015
+/-.010
+.030
+.049
+.053
+.057
+.060
+.061
+.062
+.062
WWW . Microsemi .C OM
ELECTRICAL CHARACTERISTICS* @ 25oC
* 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.
TEMPERATURE COEFFICIENT
NOMINAL ZENER VOLTAGE (VOLTS)
FIGURE 1
POWER DERATING CURVE
Copyright © 2005
10-18-2005 REV C
o
o
TL – LEAD TEMPERATURE ( C) 3/8” FROM BODY or
TA on FR4 PC BOARD
1N746 - 759A, e3
1N4370- 4372A, e3 (DO-35)
TEMPERATURE COEFFICIENT mV/ C
RATED POWER DISSIPATION - mW
GRAPHS
FIGURE 2
ZENER VOLTAGE TEMPERATURE
COEFFICIENT vs. ZENER VOLTAGE
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
1N746 thru 1N759A, -1, e3 and
1N4370 thru 1N4372A, -1, e3 DO-35
Silicon 500 mW Zener Diodes
SCOTTSDALE DIVISION
WWW . Microsemi .C OM
PACKAGE DIMENSIONS
All dimensions in: INCH
mm
FIGURE 3
CAPACITANCE vs. ZENER VOLTAGE
(TYPICAL)
1N746 - 759A, e3
1N4370- 4372A, e3 (DO-35)
Copyright © 2005
10-18-2005 REV C
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3
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