Low Voltage Avalanche
500 mW Zener Diodes DO-35
SCOTTSDALE DIVISION
1N5518B thru 1N5546B-1 DO-35
WWW.Microsemi .COM 1N5518B - 1N5546B-1, DO-35
DESCRIPTION APPEARANCE
The 1N5518 thru 1N5546 series of 0.5 watt Zener Voltage Regulators
provides a selection from 3.3 to 33 volts in standard 5% 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. This type of bonded Zener
package construction is available in JAN, JANTX, and JANTXV military
qualifications to MIL-PRF-19500/437. 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 1N5518 thru 1N5546
• Internal metallurgical bond option available by
adding a “-1” suffix
• Also available in JAN, JANTX, and JANTXV
qualifications per MIL-PRF-19500/437 by adding the
JAN, JANTX, or JANTXV prefixes to part numbers
for desired level of screening as well as –1” suffix;
(e.g. JANTX1N5518B-1, JANTXV1N5546D-1, etc.)
• Military Surface Mount available in DO-213AA
package outline by adding a UR-1 suffix in addition
to the JAN, JANTX, and JANTXV prefix; e.g.
JANTX1N5518BUR-1 (see separate data sheet)
• Commercial Surface Mount also available in
separate data sheet as 1N5518UR to 1N5546BUR
in DO-213AA package (consult factory for others)
• DO-7 glass body axial-leaded Zener equivalents are
also available
• Regulates voltage over a broad operating
current and temperature range
• Guaranteed voltage regulation (∆VZ) from IZL to IZT
• Voltage selection from 3.3 to 33 V
• Standard voltage tolerances are plus/minus 5%
with a “B” 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 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 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 (see Figure 2 for derating)
• 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: Leads, 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: 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
Copyright 2003
11-12-2003 REV B
Low Voltage Avalanche
500 mW Zener Diodes DO-35
SCOTTSDALE DIVISION
1N5518B thru 1N5546B-1 DO-35
WWW.Microsemi .COM 1N5518B - 1N5546B-1, DO-35
ELECTRICAL CHARACTERISTICS (TA = 25oC unless otherwise noted. Based on DC measurements at
thermal equilibrium; VF = 1.1 Max @ IF = 200 mA for all types.)
MAX. REVERSE LEAKAGE
CURRENT (Note 4)
VR – VOLTS
JEDEC
TYPE
NUMBER
(Note 1)
NOMINAL
ZENER
VOLTAGE
VZ @ IZT
(Note 2)
VOLTS
TEST
CURRENT
IZT
mAdc
MAX. ZENER
IMPEDANCE
B-C-D SUFFIX
ZZT @ IZT
(Note 3)
OHMS
IR
µAdc
NON & A-
SUFFIX
B-C-D
SUFFIX
B-C-D
SUFFIX
MAXIMUM
DC ZENER
CURRENT
IZM
(Note 5)
mAdc
B-C-D SUFFIX
MAX. NOISE
DENSITY
AT IZ = 250µA
ND
µV/ √Hz
REGULATION
FACTOR
∆VZ
(Note 6)
VOLTS
LOW VZ
CURRENT
IZL
(Note 6)
mAdc
1N5518
1N5519
1N5520
1N5521
1N5522
3.3
3.6
3.9
4.3
4.7
20
20
20
20
10
26
24
22
18
22
5.0
3.0
1.0
3.0
2.0
0.90
0.90
0.90
1.0
1.5
1.0
1.0
1.0
1.5
2.0
115
105
98
88
81
0.5
0.5
0.5
0.5
0.5
0.90
0.90
0.85
0.75
0.60
2.0
2.0
2.0
2.0
1.0
1N5523
1N5524
1N5525
1N5526
1N5527
5.1
5.6
6.2
6.8
7.5
5.0
3.0
1.0
1.0
1.0
26
30
30
30
35
2.0
2.0
1.0
1.0
0.5
2.0
3.0
4.5
5.5
6.0
2.5
3.5
5.0
6.2
6.8
75
68
61
56
51
0.5
1.0
1.0
1.0
2.0
0.65
0.30
0.20
0.10
0.05
0.25
0.25
0.01
0.01
0.01
1N5528
1N5529
1N5530
1N5531
1N5532
8.2
9.1
10.0
11.0
12.0
1.0
1.0
1.0
1.0
1.0
40
45
60
80
90
0.5
0.1
0.05
0.05
0.05
6.5
7.0
8.0
9.0
9.5
7.5
8.2
9.1
9.9
10.8
46
42
38
35
32
4.0
4.0
4.0
5.0
10
0.05
0.05
0.10
0.20
0.20
0.01
0.01
0.01
0.01
0.01
1N5533
1N5534
1N5535
1N5536
1N5537
13.0
14.0
15.0
16.0
17.0
1.0
1.0
1.0
1.0
1.0
90
100
100
100
100
0.01
0.01
0.01
0.01
0.01
10.5
11.5
12.5
13.0
14.0
11.7
12.6
13.5
14.4
15.3
29
27
25
24
22
15
20
20
20
20
0.20
0.20
0.20
0.20
0.20
0.01
0.01
0.01
0.01
0.01
1N5538
1N5539
1N5540
1N5541
1N5542
18.0
19.0
20.0
22.0
24.0
1.0
1.0
1.0
1.0
1.0
100
100
100
100
100
0.01
0.01
0.01
0.01
0.01
15.0
16.0
17.0
18.0
20.0
16.2
17.1
18.0
19.8
21.6
21
20
19
17
16
20
20
20
20
20
0.20
0.20
0.20
0.25
0.30
0.01
0.01
0.01
0.01
0.01
1N5543
1N5544
1N5545
1N5546
25.0
28.0
30.0
33.0
1.0
1.0
1.0
1.0
100
100
100
100
0.01
0.01
0.01
0.01
21.0
23.0
24.0
28.0
22.4
25.2
27.0
29.7
15
14
13
12
20
20
20
20
0.35
0.40
0.45
0.50
0.01
0.01
0.01
0.01
NOTES:
1. TOLERANCE AND VOLTAGE DESIGNATION –
The JEDEC type numbers shown are +/-20% with guaranteed limits for only VZ, IR, and VF. Units with A suffix are +/-10% with
guaranteed limits for VZ, IR, and VF. Units with guaranteed limits for all six parameters are indicated by a B suffix for +/-5.0% units,
C suffix for +/-2.0% and D suffix for +/-1.0%.
2. ZENER VOLTAGE (VZ) MEASUREMENT –
Nominal zener voltage is measured with the device junction in thermal equilibrium with ambient temperature of 25oC.
3. ZENER IMPEDANCE (ZZ) MEASUREMENT –
The zener impedance is derived from the 60 Hz ac voltage, which results when an ac current having an rms value equal to 10%
of the dc zener current (IZT) is superimposed on IZT.
4. REVERSE LEAKAGE CURRENT (IR) –
Reverse leakage currents are guaranteed and are measured at VR as shown on the table.
5. MAXIMUM REGULATOR CURRENT (IZM) –
The maximum current shown is as shown in MIL-PRF-19500/437.
6. MAXIMUM REGULATION FACTOR (∆VZ) –
∆VZ is the maximum difference between VZ at IZT and VZ at IZL measured with the device junction in thermal equilibrium.
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
11-12-2003 REV B
Low Voltage Avalanche
500 mW Zener Diodes DO-35
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
11-12-2003 REV B
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N5518B thru 1N5546B-1 DO-35
1N5518B - 1N5546B-1, DO-35
CIRCUIT AND GRAPHS
Noise density, (ND) is specified in microvolts rms per
square-root-hertz (µV/ √Hz). Actual measurement is
performed using a 1 kHz to 3 kHz frequency bandpass
filter with a constant Zener test current (IZT) at 25oC
ambient temperature.
TYPICAL CAPACITANCE IN PICOFARADS
At zero volts
Rated Power Dissipation (mW)
At –2 volts (VR)
FIGURE 1 TL – Lead Temperature (oC) 3/8” from body ZENER VOLTAGE VZ
Noise Density Measurement Circuit or TA on FR4 PC Board FIGURE 3
FIGURE 2 – Power Derating Curve Capacitance vs. Zener Voltage
(TYPICAL)
PACKAGE DIMENSIONS
All dimensions in: INCH
mm
FIGURE 4
Zener Diode Characteristics and Symbol Identification
