Electrical Characteristics @ 25°°C Unless Otherwise Specified
PART
NUMBER
ZENER
VOLTAGE
(V
Z
)
(NOTE 4)
TEST
CURRENT
(I
ZT
)
MAXIMUM
DYNAMIC
IMPEDANCE
(Z
ZT
@ I
ZT
)
(NOTE 2)
MAXIMUM
REVERSE
CURRENT
(I
R
@ V
R
)
TEST
VOLTAGE
(V
R
)
MAXIMUM
REGULATOR
CURRENT
(I
ZM
)
T
L
= 100
o
C
MAXIMUM
KNEE
IMPEDANCE
(Z
ZK
@ I
ZK
)
(NOTE 2)
TEST
CURRENT
(I
ZK
)
MAXIMUM
(SURGE)
CURRENT
(I
S
)
(NOTE 3)
VOLTS mA OHMS
µµA
VOLTS MA OHMS mA mA
SMAJ4728A 3.3 76 10 100 1 552 400 1.0 1380
SMAJ4729A 3.6 69 10 100 1 504 400 1.0 1260
SMAJ4730A 3.9 64 9 50 1 468 400 1.0 1190
SMAJ4731A 4.3 58 9 10 1 434 400 1.0 1070
SMAJ4732A 4.7 53 8 10 1 386 500 1.0 970
SMAJ4733A 5.1 49 7 10 1 356 550 1.0 890
SMAJ4734A 5.6 45 5 10 2 324 600 1.0 810
SMAJ4735A 6.2 41 2 10 3 292 700 1.0 730
SMAJ4736A 6.8 37 3.5 10 4 266 700 1.0 660
SMAJ4737A 7.5 34 4.0 10 5 242 700 0.5 605
SMAJ4738A 8.2 31 4.5 10 6 220 700 0.5 550
SMAJ4739A 9.1 28 5.0 10 7 200 700 0.5 500
SMAJ4740A 10 25 7 10 7.6 182 700 0.25 454
SMAJ4741A 11 23 8 5 8.4 166 700 0.25 414
SMAJ4742A 12 21 9 5 9.1 152 700 0.25 380
SMAJ4743A 13 19 10 5 9.9 138 700 0.25 344
SMAJ4744A 15 17 14 5 11.4 132 700 0.25 304
SMAJ4745A 16 15.5 16 5 12.2 114 700 0.25 285
SMAJ4746A 18 14 20 5 13.7 100 750 0.25 250
SMAJ4747A 20 12.5 22 5 15.2 90 750 0.25 225
SMAJ4748A 22 11.5 23 5 16.7 82 720 0.25 205
SMAJ4749A 24 10.5 25 5 18.2 76 750 0.25 190
SMAJ4750A 27 9.5 35 5 20.6 68 750 0.25 170
SMAJ4751A 30 8.5 40 5 22.8 60 1000 0.25 150
SMAJ4752A 33 7.5 45 5 25.1 54 1000 0.25 135
SMAJ4753A 36 7.0 50 5 27.4 50 1000 0.25 125
SMAJ4754A 39 6.5 60 5 29.7 46 1000 0.25 115
SMAJ4755A 43 6.0 70 5 32.7 44 1500 0.25 110
SMAJ4756A 47 5.5 80 5 35.8 38 1500 0.25 95
SMAJ4757A 51 5.0 95 5 38.8 36 1500 0.25 90
SMAJ4758A 56 4.5 110 5 42.6 32 2000 0.25 80
SMAJ4759A 62 4.0 125 5 47.1 28 2000 0.25 70
SMAJ4760A 68 3.7 150 5 51.7 26 2000 0.25 65
SMAJ4761A 75 3.3 175 5 56.0 24 2000 0.25 60
SMAJ4762A 82 3.0 200 5 62.2 22 3000 0.25 55
SMAJ4763A 91 2.8 250 5 69.2 20 3000 0.25 50
SMAJ4764A 100 2.5 350 5 76.0 18 3000 0.25 45
SMAJ4728A thru SMAJ4764A
NOTE:
1. The type numbers shown have a 5% tolerance on nominal zener voltage. No suffix signifies a 10% tolerance, C signifies 2%, and D signifies 1% tolerance.
2. 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 (I
ZT
or I
ZK
) is superimposed on I
ZT
. Zener impedance is measured at two points to insure a sharp knee on the breakdown curve and
eliminate unstable units.
3. The reverse surge current is measured at 25
o
C ambient using a ½ square wave or equivalent sine wave pulse 1/120 second duration superimposed
on I
ZT
.
4. Voltage at thermal equilibrium or 90 seconds after application of dc current.
