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, e3 and
1N4370 thru 1N4372A, e3 DO-7
1N746 – 759A, e3
1N4370- 4372A, e3 (DO-7)
DESCRIPTION APPEARANCE
The popular 1N746 thru 1N759A 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. The DO-7 packaging option offers a “straight-through”
soldered internal connection with a larger active die element than otherwise
provided in the smaller DO-35 package when needed. It is also available
as a RoHS Compliant option by adding an “e3” suffix. Microsemi also
offers numerous other Zener products to meet higher and lower power
applications.
DO-7
(DO-204AA)
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
FEATURES
APPLIC ATIONS / BENEFITS
• JEDEC registered 1N746 thru 1N759A series
• Internally solder bonded
• 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.
• RoHS Compliant devices avai lable by adding “e3” suffix
• Surface mount equivalents in DO-213AA also available
as MLL1N746 thru MLL759A (consult factory for other
surface mount options)
• Smaller DO-35 glass body axial-leaded Zener
equivalents are also available
• Regulates voltage over a broad op erating current
and temperature range
• Selection from 2.4 to 12 V
• Standard voltage tolerances are plus/minus 5% with
A suffix, 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
• Capacitance also specified (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: 300 ºC/W junction to lead at 3/8
(10 mm) lead length from body, or 360ºC/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 < 25oC 3/8 inch
(10 mm) from body or 0.417 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-7
(DO-204AA) 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, e3 and
1N4370 thru 1N4372A, e3 DO-7
1N746 – 759A, e3
1N4370- 4372A, e3 (DO-7)
ELECTRICAL CHARACTERISTICS* @ 25oC MAXIMUM REVERSE
CURRENT
@ 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 (2 mA 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
RATED POWER DISSIPATION - mW
TEMPERATURE COEFFICIENT mV/
º
C
Voltage Temperature
Coefficient %/oC
TEMPERATURE COEFFICIENT
mV Change /oC
T
L – LEAD TEMPERATURE (oC) 3/8” FROM BODY NOMINAL ZENER VOLTAGE (VOLTS)
or 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, e3 and
1N4370 thru 1N4372A, e3 DO-7
1N746 – 759A, e3
1N4370- 4372A, e3 (DO-7)
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
