SMA4728A~SMA4764A
Zener diode
Features
1. For surface mounted application s
2. Low zener impedance
3. Low regulation factor
4. VZ-tolerance±5%
Applications
Voltage st abil ization
Absolute Maximum Ratings
Tj=25℃ Parameter Test Conditions Type Symbol Value Unit
Power dissipation Tamb≤50℃ P
d1 W
Z-current IZPV/VZmA
Junction temperature Tj200 ℃
Storage temperature range Tstg -65~+175 ℃
Maximum Thermal Resistance
Tj=25℃ Parameter Test Conditions Symbol Value Unit
Junction ambient I=9.5mm(3/8”) T L=constant RthJA 100 K/W
Stresses exceeding maximum rati ngs may damage the device. Maximum ratings are stress ratings only. Functional operation above the
recommended operating conditions is not implied. Extended exposure to stresses above the recommended operating conditions may
affect device reliability.
Electrical Characteristics
Tj=25℃ Parameter Test Conditions Type Symbol Min Typ Max Unit
Forward voltage IF=200mA VF 1.2 V
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SMA4728A~SMA4764A
VZnom1) IZT for r
zjT rzjK at I
ZK IR at VR
Type Device
marking V mA Ω Ω mA μA V
SMA4728A 4728A 3.3 76 <10 <400 1 <100 1
SMA4729A 4729A 3.6 69 <10 <400 1 <100 1
SMA4730A 4730A 3.9 64 <9 <400 1 <50 1
SMA4731A 4731A 4.3 58 <9 <400 1 <10 1
SMA4732A 4732A 4.7 53 <8 <500 1 <10 1
SMA4733A 4733A 5.1 49 <7 <550 1 <10 1
SMA4734A 4734A 5.6 45 <5 <600 1 <10 2
SMA4735A 4735A 6.2 41 <2 <700 1 <10 3
SMA4736A 4736A 6.8 37 <3.5 <700 1 <10 4
SMA4737A 4737A 7.5 34 <4.0 <700 0. 5 <10 5
SMA4738A 4738A 8.2 31 <4.5 <700 0. 5 <10 6
SMA4739A 4739A 9.1 28 <5.0 <700 0. 5 <10 7
SMA4740A 4740A 10 25 <7 <700 0.25 <10 7.6
SMA4741A 4741A 11 23 <8 <700 0.25 <5 8.4
SMA4742A 4742A 12 21 <9 <700 0.25 <5 9.1
SMA4743A 4743A 13 19 <10 <700 0.25 <5 9.9
SMA4744A 4744A 15 17 <14 <700 0.25 <5 11.4
SMA4745A 4745A 16 15.5 <16 <700 0.25 <5 12.2
SMA4746A 4746A 18 14 <20 <750 0.25 <5 13.7
SMA4747A 4747A 20 12.5 <22 <750 0.25 <5 15.2
SMA4748A 4748A 22 11.5 <23 <750 0.25 <5 16.7
SMA4749A 4749A 24 10.5 <25 <750 0.25 <5 18.2
SMA4750A 4750A 27 9.5 <35 <750 0.25 <5 20.6
SMA4751A 4751A 30 8.5 <40 <1000 0.25 <5 22.8
SMA4752A 4752A 33 7.5 <45 <1000 0.25 <5 25.1
SMA4753A 4753A 36 7.0 <50 <1000 0.25 <5 27.4
SMA4754A 4754A 39 6.5 <60 <1000 0.25 <5 29.7
SMA4755A 4755A 43 6.0 <70 <1500 0.25 <5 32.7
SMA4756A 4756A 47 5.5 <80 <1500 0.25 <5 35.8
SMA4757A 4757A 51 5.0 <95 <1500 0.25 <5 38.8
SMA4758A 4758A 56 4.5 <110 <2000 0.25 <5 42.6
SMA4759A 4759A 62 4.0 <125 <2000 0.25 <5 47.1
SMA4760A 4760A 68 3.7 <150 <2000 0.25 <5 51.7
SMA4761A 4761A 75 3.3 <175 <2000 0.25 <5 56
SMA4762A 4762A 82 3.0 <200 <3000 0.25 <5 62.2
SMA4763A 4763A 91 2.8 <250 <3000 0.25 <5 69.2
SMA4764A 4764A 100 2.5 <350 <3000 0.25 <5 76
Excel Semiconductor
1) Based on DC-mea su rement at thermal equilibrium while maintai ning the lead temperature(TL)at 30℃,
9.5mm(3/8”) from the diode body.
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SMA4728A~SMA4764A
Characteristics (Tj=25℃ unless otherwise specified)
Symbol Parameter
Vz Reverse zener voltage @ IZT
IZT Reverse current
ZZT Maximum zener impedance @ IZT
IZK Reverse current
ZZK Maximum zener impedance @ IZK
IRReverse leakage current @ VR
VRBreakdown voltage
IFForward current
VFForward voltage @ IF
Figure 1. Zener voltage regulator
Figure 2. Temperature coefficients
(-55℃ to +150℃ temperature range; 90% of the units are in the ranges indicated)
Figure 3. Effect of zener current on zener impedance Figure 4. Effect of zener voltage on zener impedance
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SMA4728A~SMA4764A
Dimensions in inches (mm)
Cathode identification
47
46A
DO-214AC (SMA)
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