NTE1V010 thru NTE1V300
NTE2V010 thru NTEV480
NTE524V13 thru NTE524V48
Metal Oxide Varistors (MOV)
Description:
The NTE Metal Oxide Varistors feature a barrier layer that gives the user fast response time. These devices have a high
transient current handling capability when high voltage is applied. Static resistance is, however, very high under low volt-
age conditions, permitting low standby drain currents.
The NTE 1V Series Varistors have a nonlinear voltage/current characteristic as expressed by the relationship:
I = KV
n
Where I = The current in amperes
V = The voltage
K = A constant
n = A constant which shows the dependence of
the voltage V upon the current I. It is called
the voltagedependant index
Features:
D
High Transient Current Capability up to 6500A
D
Fast Response Time less than 35ns
D
Excellent Voltage Clamping Characteristics
D
Very Low Temperature Coefficient
D
Low Standby Current
D
High Energy Capability
D
The Value for "n" is Greater
D
Very Low Leakage Current
D
Low Capacitance
D
Low Overshoot Characteristics
Electrical Ratings:
Varistor Voltage
The voltage across the varistor at a DC current of 1.0mA.
Energy
The maximum electrical energy which can be dissipated within the varistor by a single impulse of 10 x 1000
s current
waveform with continuous voltage applied. Energy ratings are based on a shift of varistor voltage of less than 10% of the
initial value. The unit is expressed in joules.
Peak Current
The maximum current allowable for a single pulse of 8 x 20
s exponential waveform.
Operating Ambient Temperature
40
to +85
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature
40
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Response Time
less than 35ns
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Temperature Coefficient
less than 0.05%/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NonLinear Exponent
NTE1V010 to NTE1V075, NTE2V010 to NTE2V075
15 to 50
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NTE1V095 to NTE1V300, NTE2V095 to NTE2V480, NTE524V13 to NTE542V48
greater than 40
. . . . . . . . . . .
Maximum Leakage Current
10
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics (Cont'd):
Maximum Ratings (T
A
= 25
C)
Continuous
Transient
Characteristics
NTE Type
Number
Case Diameter
RMS
Voltage
(Volts)
DC
Voltage
(Volts)
Energy
(10/1000
s)
(Joules)
Peak Current
(8/20
s)
(Amps)
Nominal
Varistor
Voltage
@ 1mA DC
Test Current
(Volts)
Maximum
Clamping
Voltage, V
C
@ Test Current
(8/20
s)
(Volts)
Transient
Power
Dissipation
(Watts)
V
m
(AC)
V
m
(DC)
W
TM
I
TM
V
NOM
V
CL
P
D
1V300
8.5mm
280
370
22.0
1200
470
740
0.25
2V300
16mm
280
370
79.0
4500
470
740
0.60
524V30
23mm
280
370
149.0
6500
470
740
1.00
2V420
16mm
420
560
90.0
4500
680
1110
0.60
524V42
23mm
420
560
160.0
6500
680
1110
1.00
2V480
16mm
480
640
105.0
4500
750
1240
0.60
524V48
23mm
480
640
180.0
6500
750
1240
1.00
Cautions:
NTE varistors shortcircuit when subjected to surges beyond their peak current and energy ratings.
NTE varistors shortcircuit when operated at steadystate voltages well beyond their voltage ratings, which may eventual-
ly result in opencircuiting leaving the circuit without protection.
The following precautions should be taken to minimize this potential hazard:
D
Fusing the varistor to limit high fault currents.
D
Protecting the surrounding circuitry by physical shielding.
D
Locating the varistor away from other components.
LS
Typical Power Supply Circuit
100
H
D
0.1
F
150
F
+
D
L
LL
H
LD
1V Series
.345
.235
.475
1.000 .200
.024
(9.0)
(6.0)
(12.0)
(25.4) (5.08) (0.6)
2V Series
.699
.275
.787
1.000 .315
.031
(17.8) (7.0)
(20.0)
(25.4) (8.0)
(0.8)
524V Series .945
.291
1.230
1.063 .394
.039
(24.0) (7.4)
(31.0)
(27.0) (10.0) (1.0)
D
H
L
LL
LS
LD
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