Surface Mount 500 mW Zener Diodes
SCOTTSDALE DIVISION
1N746UR-1 thru 1N759AUR-1 and
1N4370UR-1 thru 1N4372AUR-1
(or MLL746-1 thru MLL759A-1 and
MLL4370-1 thru MLL4372A-1)
WWW.Microsemi .COM
FEATURES APPLICATIONS / BENEFITS
• Surface mount equivalents to the JEDEC registered
1N746 thru 1N759A and 1N4370 thru 1N4372A series
• Internal metallurgical bonding
• Also available in JAN, JANTX, and JANTXV
qualifications per MIL-PRF-19500/127 by adding the
JAN, JANTX, or JANTXV prefixes to part numbers for
desired level of screening; (e.g. JANTX1N751AUR-1,
JANTXV1N758CUR-1, etc.)
• Axial-leaded equivalents also available in DO-35
including JAN, JANTX, and JANTXV military qualified
options to MIL-PRF-19500/127; e.g. JANTX1N753A-1
(see separate data sheet)
• 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
• Hermetically sealed surface mount package
• 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
• Nonsensitive to ESD per MIL-STD-750 Method 1020
• Minimal capacitance (see Figure 2)
• Inherently radiation hard as described in Microsemi
MicroNote 050
MAXIMUM RATINGS MECHANICAL AND PACKAGING
• Operating and Storage temperature: -65ºC to +175ºC
• Thermal Resistance: 100 ºC/W junction to end or
250ºC/W junction to ambient when mounted on FR4
PC board (1 oz Cu) with recommended footprint (see
last page)
• Steady-State Power: 0.5 watts at end cap
temperature TEC < 125oC or 0.5 watts at ambient TA <
50ºC when mounted on FR4 PC board as described
for thermal resistance above (also see Figure 2)
• Forward voltage @200 mA: 1.1 volts
• Solder Temperatures: 260 ºC for 10 s (max)
• CASE: Hermetically sealed glass DO-213AA
(SOD80 or MLL34) MELF style package
• TERMINALS: End caps tin-lead plated solderable
per MIL-STD-750, method 2026
• POLARITY: Cathode indicated by band where
diode is to be operated with the banded end positive
with respect to the opposite end for Zener regulation
• MARKING: cathode band only
• TAPE & REEL option: Standard per EIA-481-B with
12 mm tape, 2000 per 7 inch reel or 5000 per 13
inch reel (add “TR” suffix to part number)
• WEIGHT: 0.04 grams
• See package dimensions on last page
DESCRIPTION APPEARANCE
The 1N746UR-1 thru 1N759AUR-1 and 1N4370UR-1 thru 1N4372AUR-1
series of 0.5 watt Zener Voltage Regulators provides a surface mount
equivalent to the popular JEDEC registered 1N746 to 1N759A and 1N4370
to 1N4372A for 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 surface mount DO-213AA Zeners have internal-metallurgical-
bonding and are also available in JAN, JANTX, and JANTXV military
qualifications. Microsemi also offers numerous other Zener products to
meet higher and lower power applications.
DO-213AA
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
1N746UR-1 –759AUR-1
1N4
3
7
0U
R-1 – 4
3
72A
U
R-1
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
Copyright 2003
11-03-2003 REV 0
Surface Mount 500 mW Zener Diodes
SCOTTSDALE DIVISION
1N746UR-1 thru 1N759AUR-1 and
1N4370UR-1 thru 1N4372AUR-1
(or MLL746-1 thru MLL759A-1 and
MLL4370-1 thru MLL4372A-1)
WWW.Microsemi .COM
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
INDUSTRY
PART
NUMBER
(NOTES 1 & 5) VOLTS mA OHMS µA µA mA %/oC
1N4370UR-1
1N4371UR-1
1N4372UR-1
2.4
2.7
3.0
20
20
20
30
30
29
100
75
50
200
150
100
150
135
120
-.085
-.080
-.075
1N746UR-1
1N747UR-1
1N748UR-1
3.3
3.6
3.9
20
20
20
28
24
23
10
10
10
30
30
30
110
100
95
-.066
-.058
-.046
1N749UR-1
1N750UR-1
1N751UR-1
1N752UR-1
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
1N753UR-1
1N754UR-1
1N755UR-1
1N756UR-1
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
1N757UR-1
1N758UR-1
1N759UR-1
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 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.
NOTE 5: These may be ordered as either 1N4370UR-1 thru 1N4372AUR-1 and 1N746UR-1 thru 1N758AUR-1, or as MLL4370-1 thru
MLL4372A-1 and MLL746-1 thru MLL758A-1. For military types, use the 1NxxxUR-1 format and also include JAN, JANTX, or JANTXV
prefix for desired screening level, e.g. JANTX1N4370UR-1, JANTXV1N746AUR-1, JANTXV1N758UR-1, etc.
GRAPHS
RATED POWER DISSIPATION - mW
TEC
Typical Capacitance in Picofarads (pf)
1N746UR-1 –759AUR-1
1N4
3
7
0U
R-1 – 4
3
72A
U
R-1
TA
TEC End Cap Temperature (oC), or Zener Voltage VZ
T
A Ambient Temperature on FR4 PC BOARD FIGURE 2
FIGURE 1 CAPACITANCE vs. ZENER VOLTAGE
POWER DERATING CURVE (TYPICAL)
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
Copyright 2003
11-03-2003 REV 0
Surface Mount 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 3
Copyright 2003
11-03-2003 REV 0
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N746UR-1 thru 1N759AUR-1 and
1N4370UR-1 thru 1N4372AUR-1
(or MLL746-1 thru MLL759A-1 and
MLL4370-1 thru MLL4372A-1)
1N746UR-1 –759AUR-1
1N4
PACKAGE DIMENSIONS
INCHES MILLIMETERS
DIM MIN MAX MIN MAX
A 0.063 0.067 1.60 1.70
B 0.130 0.146 3.30 3.70
C 0.016 0.022 0.41 0.55
PAD LAYOUT
INCHES mm
A .200 5.08
B .055 1.40
C .080 2.03
3
7
0U
R-1 – 4
3
72A
U
R-1
