Features
Silicon p
ower zener diodes
For use in stabilizing and clipping circuits
with high power rating.
Suffix”A” for ±5% tolerance.
Maximum Rating (T
A
=25°C unless otherwise specified)
Note1: Thermal resistance from junction to ambient & lead, mounted on PCB with 5.0×5.0mm copper pads
Electrical Charateristics (T
A
=25°C unless otherwise specified)
Part number
Device
Marking
Code
Nominal
Zener
Voltage at
IZT Vz
(Volts)
(1)
Test
Current
IZT(mA)
Maximum
Zener
Impedance
(2)
Maximum
Reverse
Leakage
Current
Maximum
Surge
Current
(3)
Maximum
Regulator
Current
(4)
at
TA=50°C
ZZT at IZT
(Ω)
ZZK
(Ω)
At IZK
(mA)
IR(uA)
at VR
(Volts)
I
RM
(mApk) IZM(mA)
1SMA4738A 4738A 8.2 31 4.5 700 0.5 10 6 550 122
1SMA4739A 4739A 9.1 28 5.0 700 0.5 10 7 500 110
1SMA4740A 4740A 10 25 7 700 0.25 10 7.6 454 100
1SMA4741A 4741A 11 23 8 700 0.25 5 8.4 414 83
1SMA4742A 4742A 12 21 9 700 0.25 5 9.1 380 76
1SMA4743A 4743A 13 19 10 700 0.25 5 9.9 344 69
1SMA4744A 4744A 15 17 14 700 0.25 5 11.4 304 61
1SMA4745A 4745A 16 15.5 16 700 0.25 5 12.2 285 57
1SMA4746A 4746A 18 14 20 750 0.25 5 13.7 250 50
1SMA4747A 4747A 20 12.5 22 750 0.25 5 15.2 225 45
1SMA4748A 4748A 22 11.5 23 750 0.25 5 16.7 205 41
1SMA4749A 4749A 24 10.5 25 750 0.25 5 18.2 190 38
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Package:
DO-214AC (SMA)
Parameter Symbol Value Unit
Zener Current
See Next Page
Power Dissipation at T
L
=70°C
P
tot
1 W
JunctionTemperature T
J
150
°C
Storage Temperature Range
T
S
-55to+150
°C
Typical Thermal Resistance (Note1)
R
θJA
125
°C/W
R
θJL
30
°C/W
1SMA4738A thru 1SMA4764A
Surface Mount Zener Diodes
Vz Range:8.2V to 100V Power Dissipation:1W
Part number
Device
Marking
Code
Nominal
Zener
Voltage at
I
ZT
Vz
(Volts)
(1)
Test
Current
I
ZT(mA)
Maximum
Zener
Impedance
(2)
Maximum
Reverse
Leakage
Current
Maximum
Surge
Current
(3)
Maximum
Regulator
Current
(4)
at
TA
=50°C
ZZT
at IZT
(Ω)
ZZK
(Ω)
At IZK
(mA)
IR
(uA)
at V
R
(Volts)
I
RM
(mApk) IZM
(mA)
1SMA4750A 4750A 27 9.5 35 750 0.25 5 20.6 170 34
1SMA4751A 4751A 30 8.5 40 1000 0.25 5 22.8 150 30
1SMA4752A 4752A 33 7.5 45 1000 0.25 5 25.1 135 27
1SMA4753A 4553A 36 7.0 50 1000 0.25 5 27.4 125 25
1SMA4754A 4754A 39 6.5 60 1000 0.25 5 29.7 115 23
1SMA4755A 4755A 43 6.0 70 1500 0.25 5 32.7 110 22
1SMA4756A 4756A 47 5.5 80 1500 0.25 5 35.8 95 19
1SMA4757A 4757A 51 5.0 95 1500 0.25 5 38.8 90 18
1SMA4758A 4758A 56 4.5 110 2000 0.25 5 42.6 80 16
1SMA4759A 4759A 62 4.0 125 2000 0.25 5 47.1 70 14
1SMA4760A 4760A 68 3.7 150 2000 0.25 5 51.7 65 13
1SMA4761A 4761A 75 3.3 175 2000 0.25 5 56.0 60 12
1SMA4762A 4762A 82 3.0 200 3000 0.25 5 62.2 55 11
1SMA4763A 4763A 91 2.8 250 3000 0.25 5 69.2 50 10
1SMA4764A 4764A 100 2.5 350 3000 0.25 5 76 45 9
Notes: (1) Measured under thermal equilibrium and DC test conditions , Standard voltage tolerance is 10%, suffix A±5%.
(2) The Zener impedance is derived from the 1KHZ AC voltage which results when an AC current having an RMS value
equal to 10% of the Zener current (IZT or IZK) is superimposed on IZT or IZK. Zener impedance is measure at two points to
insure a sharp knee on the
breakdown curve and to eliminate unstable units.
(3)
Maximum
surge current: Surge current is a non-repetitive,8.3ms pulse width square wave or equivalent sine-wave
superimposed on IZT per JEDEC method.
(4) Valid provided that electrodes at a distance of 10 mm from case are kept at ambient temperature.
2/4
Electrical Charateristics (T
A
=25°C unless otherwise specified)
1SMA4738A thru 1SMA4764A
Surface Mount Zener Diodes
Vz Range:8.2V to 100V Power Dissipation:1W