1N746 thru 1N759A, -1, e3 and
1N4370 thru 1N4372A, -1, e3 DO-35
Silicon 500 mW Zener Diodes
SCOTTSDALE DIVISION
DESCRIPTION
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.
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
APPEARANCE
WWW .
Microsemi
.C
OM
DO-35
(DO-204AH)
FEATURES
•
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
•
•
•
•
•
•
•
•
APPLICATIONS / BENEFITS
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
•
Operating and Storage temperature: -65
º
C to +175
º
C
•
Thermal Resistance: 250
º
C/W junction to lead at 3/8
(10 mm) lead length from body, or 310
º
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
o
C 3/8 inch
(10 mm) from body or 0.48 W at T
A
< 25
º
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
º
C for 10 s (max)
MECHANICAL AND PACKAGING
•
•
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
•
•
•
•
•
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 1
1N746 thru 1N759A, -1, e3 and
1N4370 thru 1N4372A, -1, e3 DO-35
Silicon 500 mW Zener Diodes
SCOTTSDALE DIVISION
ELECTRICAL CHARACTERISTICS* @ 25
o
C
JEDEC
TYPE NO.
(NOTE1)
1N4370
1N4371
1N4372
1N746
1N747
1N748
1N749
1N750
1N751
1N752
1N753
1N754
1N755
1N756
1N757
1N758
1N759
NOMINAL
ZENER
VOLTAGE
V
Z
@
I
ZT
(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
MAXIMUM
ZENER
IMPEDANCE
Z
ZT
@
I
ZT
(NOTE 3)
OHMS
30
30
29
28
24
23
22
19
17
11
7
5
6
8
10
17
30
MAXIMUM REVERSE
CURRENT I
R
@ V
R
= 1 VOLT
@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
MAXIMUM
ZENER
CURRENT
TYPICAL
TEMP COEFF.
OF ZENER
VOLTAGE
α
VZ
o
%/ C
-.085
-.080
-.075
-.066
-.058
-.046
-.033
-.015
+/-.010
+.030
+.049
+.053
+.057
+.060
+.061
+.062
+.062
WWW .
Microsemi
.C
OM
I
ZT
mA
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
I
ZM
(NOTE 4)
mA
150
135
120
110
100
95
85
75
70
65
60
55
50
45
40
35
30
* 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
I
ZT
, a 60 cps, rms ac current equal to 10%
I
ZT
(2mA ac). See MicroNote 202 for
typical zener Impedance variation with different operating currents.
NOTE 4:
Allowance has been made for the increase in
V
Z
due to Z
Z
and for the increase in junction temperature as the unit approaches
thermal equilibrium at the power dissipation of 400 mW.
GRAPHS
TEMPERATURE COEFFICIENT mV/ C
RATED POWER DISSIPATION - mW
TEMPERATURE COEFFICIENT
1N746 - 759A, e3
1N4370- 4372A, e3 (DO-35)
o
T
L
– LEAD TEMPERATURE ( C) 3/8” FROM BODY or
T
A
on FR4 PC BOARD
o
NOMINAL ZENER VOLTAGE (VOLTS)
FIGURE 1
POWER DERATING CURVE
FIGURE 2
ZENER VOLTAGE TEMPERATURE
COEFFICIENT vs. ZENER VOLTAGE
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 2
Microchip MCU
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