1N5281B (DO-35)

Manufacturer Part Number1N5281B (DO-35)
ManufacturerMICROSEMI
TypeVoltage Regulator
1N5281B (DO-35) datasheet
 

Specifications of 1N5281B (DO-35)

Number Of ElementsSinglePackage TypeDO-35
Zener Voltage (typ)200VZener Test Current0.65mA
Voltage Tolerance5%Power Dissipation480mW
Knee Impedance2500OhmOperating Temperature ClassificationMilitary
Rev Curr100nAMountingThrough Hole
Pin Count2Operating Temp Range-65C to 175C
Lead Free Status / Rohs StatusNot Compliant  
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S C O T T S D A L E D I V I S I O N
The popular 1N5221 thru 1N5281B series of 0.5 watt Zener Voltage Regulators
provides a selection from 2.4 to 200 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 in various military
screening levels by adding a prefix identifier as described in the Features
section. Microsemi also offers numerous other Zener products to meet higher
and lower power applications.
IMPORTANT: For the most current data, consult MICROSEMI’s website:
FEATURES
JEDEC registered 1N5221 to 1N5281B
Internal bonds optionally available with “-1” suffix
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 with “-1” suffix.
Surface mount equivalents available as MLL5221 to
MLL5281B in the DO-213AA MELF style package
including “-1” suffix options (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
º
Power dissipation at 25
C: 0.5 watts (also see derating
in Figure 1).
Operating and Storage temperature: -65
º
Thermal Resistance: 250
C/W junction to lead at 3/8
(10 mm) lead length from body, or 310
ambient when mounted on FR4 PC board (1 oz Cu)
2
with 4 mm
copper pads and track width 1 mm, length
25 mm
Steady-State Power: 0.5 watts at T
(10 mm) from body or 0.48 W at T
mounted on FR4 PC board as described for thermal
resistance above (also see Figure1)
Forward voltage @200 mA: 1.5 volts (maximum)
º
Solder Temperatures: 260
C for 10 s (max)
ELECTRICAL CHARACTERISTICS @ 25°C
Nominal
Test
Zener
JEDEC
Current
Voltage
Type No.
I
ZT
Note 1
V
@ I
Z
ZT
mA
Volts
1N5221
2.4
20
1N5222
2.5
20
1N5223
2.7
20
1N5224
2.8
20
1N5225
3.0
20
1N5226
3.3
20
1N5227
3.6
20
1N5228
3.9
20
1N5229
4.3
20
1N5230
4.7
20
Copyright © 2005
8-09-2005 REV D
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
1N5221 thru 1N5281B, e3 DO-35
500 mW GLASS AXIAL-LEAD
DESCRIPTION
http://www.microsemi.com
Regulates voltage over a broad operating current
and temperature range
Extensive selection from 2.4 to 200 V
Standard voltage tolerances are plus/minus 5%
with B suffix, 10 % with A 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 (MIL-STD-750 Method 1020)
Minimal capacitance (see Figure 2)
Inherently radiation hard per MicroNote 050
MECHANICAL AND PACKAGING
CASE: Hermetically sealed axial-lead glass DO-
35 (DO-204AH) package
º
º
C to +175
C
FINISH: Tin-Lead or RoHS Compliant annealed
matte-Tin plating solderable per MIL-STD-750,
º
method 2026
C/W junction to
POLARITY: Cathode indicated by band. Diode to
be operated with the banded end positive with
respect to the opposite end for Zener regulation
o
< 50
C 3/8 inch
MARKING: Part number
L
º
< 25
C when
TAPE & REEL option: Standard per EIA-296 (add
A
“TR” suffix to part number)
WEIGHT: 0.2 grams
See package dimensions on last page
Max Zener Impedance
A & B Suffix Only
A, B, C & D Suffix Only
Note 2
I
R
Z
@ I
= 0.25
ZK
ZK
μA
Z
@ I
ZT
ZK
mA
Ohms
Ohms
30
1200
100
0.95
30
1250
100
0.95
30
1300
75
0.95
30
1400
75
0.95
29
1600
50
0.95
28
1600
25
0.95
24
1700
15
0.95
23
1900
10
0.95
22
2000
5.0
0.95
19
1900
50
Microsemi
Scottsdale Division
ZENER DIODES
APPEARANCE
DO-35
)
(DO-204AH
APPLICATIONS / BENEFITS
Max Reverse Current
Max Zener
Voltage Temp.
Non-Suffix
Coeff.
(A & B Suffix
@
V
R
I
@ V
Used
R
R
Only)
Volts
For Suffix A
α
μA
VZ
A
B,C & D
Note 3
1.0
200
-0.085
1.0
200
-0.085
1.0
150
-0.080
1.0
150
-0.080
1.0
100
-0.075
1.0
100
-0.070
1.0
100
-0.065
1.0
75
-0.060
1.0
50
+/-0.055
1.9
2.0
50
+/-0.030
o
(% /
C)
Page 1

1N5281B (DO-35) Summary of contents

  • Page 1

    ... These glass axial-leaded DO-35 Zeners are also available in various military screening levels by adding a prefix identifier as described in the Features section. Microsemi also offers numerous other Zener products to meet higher and lower power applications. IMPORTANT: For the most current data, consult MICROSEMI’s website: FEATURES • ...

  • Page 2

    ... I . Zener impedance is measured at two points to ensure a sharp knee on the breakdown curve 125 C (1N5221A, B thru 1N5242A, B 125 C (1N5243A, B thru 1N5281A, B). 2 Microsemi Scottsdale Division ZENER DIODES Max Reverse Current Max Zener Voltage Temp. Non-Suffix Coeff. (A & B Suffix @ Used R R ...

  • Page 3

    ... CAPACITANCE vs. ZENER VOLTAGE Copyright © 2005 8-09-2005 REV D 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 1N5221 thru 1N5281B, e3 DO-35 500 mW GLASS AXIAL-LEAD ZENER DIODES GRAPHS FIGURE 2 (TYPICAL) PACKAGE DIMENSIONS All dimensions in INCH mm Microsemi Scottsdale Division Page 3 ...