Silicon Zener Diode
Features:
•
•
•
•
F
orsurfacemountedapplication(flathandingsurfacefor
Accurate placement)
Highsurgecurrentrating
H
ighervoltagesavailable
Availableontapeandreel
Mechanical Data:
Case
Terminals
Polarity
Temperatureforsoldering
VoltageRange
PowerDissipation
:JEDECDO-214ACmoldedplasticbodyoverpassivatedchip
:SolderableperMIL-STD-750,method2026
:Indicatedbycathodeband
:260°Cfor10seconds(Max.)
:3.3to100Volts
:1.0Watts
ForsurfacemountapplicationwithflameretardantepoxyMeetingUL94V-0
Maximum Ratings and Electrical Characteristics:
Ratingat25°Cambienttemperatureunlessotherwisespecified.
Singlephase,halfwave,60Hz,resistiveorinductiveload.
Forcapacitiveload,deratecurrentby20%.
Characteristics
PeakReverseVoltage
Max.ForwardVoltage(Note1)
SteadyStatePowerDissipationat(Note2,3)
OperatingTemperatureRange
StorageTemperatureRange
Symbol
I
s
V
f
P
(AV)
T
J
T
sTg
Value
SeeTable
1.2
1
-55to+150
Volts
Watts
°C
Unit
Notes:
1.ForwardCurrent@200mA.
2.Mountedon4mm
2
copperpadstoeachterminal
3.Leadtemperatureat100°Corless.Deratelinearlyabove100°Ctozeropowerat150°C
Part Number
Zener
Voltage
Test
Current
Izt
Max.
Dynamic
Impedance
Zzt@Izt
Ω
4
7
9
Max.
Reverse
Current
Ir@Vr
μA
10
10
5
Max.
Max.
Test
Regulator
Knee
Voltage Current
Impedance
Vr
Izm
Zzk@Izk
Ta=50°C
Volts
5
7.6
9.1
mA
121
91
76
Ω
700
700
700
Test
Current
Izk
Max.
Surge
Current
Is
mA
605
454
380
Volts
SMAJ4737A
SMAJ4740A
SMAJ4742A
7.5
10
12
mA
34
25
21
mA
0.5
0.25
0.25
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Silicon Zener Diode
Part Number
Zener
Voltage
Test
Current
Izt
Max.
Dynamic
Impedance
Zzt@Izt
Ω
14
16
20
22
23
25
35
40
45
80
110
Max.
Reverse
Current
Ir@Vr
μA
5
5
5
5
5
5
5
5
5
5
5
Max.
Max.
Test
Regulator
Knee
Voltage Current
Impedance
Vr
Izm
Zzk@Izk
Ta=50°C
Volts
11.4
12.2
13.7
15.2
16.7
18.2
20.6
22.8
25.1
35.8
42.6
mA
61
57
50
45
41
38
34
30
27
19
16
Ω
700
700
750
750
750
750
750
1000
1000
1500
2000
Test
Current
Izk
Max.
Surge
Current
Is
mA
304
285
250
225
205
190
170
150
135
95
80
Volts
SMAJ4744A
SMAJ4745A
SMAJ4746A
SMAJ4747A
SMAJ4748A
SMAJ4749A
SMAJ4750A
SMAJ4751A
SMAJ4752A
SMAJ4756A
SMAJ4758A
Notes:
15
16
18
20
22
24
27
30
33
47
56
mA
17
15.5
14
12.5
11.5
10.5
9.5
8.5
7.5
5.5
4.5
mA
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
1. hezenerimpedanceisderivedfromthe60HzACvoltage,whichresultswhenanACcurrenthavinganrmsvalueequal
T
to10%oftheDCzenercurrent(IztorIzk)issuperimposedonIzk.Zenerimpedanceismeasuredattwopointstoinsurea
sharpkneeonthebreakdowncurveandeliminateunstableunits.
2. hereversesurgecurrentismeasuredat25°Cambientusinga1/2squarewaveorequivalentsinewavepulse
T
1/20seconddurationsuperimposedonIzt.
3. oltagemeasurementstobeperformed90secondsafterapplicationofDCcurrent.
V
Ratings and Characteristic Curves
Admissible power dissipation versus ambient temperature
Valid provided that leads are kept at ambient temperature at a distance of 10mm from case.
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Silicon Zener Diode
Dimensions:
Part Number Table
Dimensions:Inches(Millimetres)
Description
Part Number
SMAJ4737A
SMAJ4740A
SMAJ4742A
SMAJ4744A
SMAJ4745A
SMAJ4746A
SiliconZenerDiodes
SMAJ4747A
SMAJ4748A
SMAJ4749A
SMAJ4750A
SMAJ4751A
SMAJ4752A
SMAJ4756A
SMAJ4758A
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errorinoromissionfromitorforanyusemadeofit.UsersofthisdatasheetshouldcheckforthemselvestheInformationandthesuitabilityoftheproductsfortheirpurposeandnotmakeany
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