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 non–linear voltage/current characteristic as expressed by the relationship:
I
Where I
V
K
n
=
=
=
=
=
KV
n
The current in amperes
The voltage
A constant
A constant which shows the dependence of
the voltage V upon the current I. It is called
the voltage–dependant 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
D
D
D
D
High Energy Capability
The Value for “n” is Greater
Very Low Leakage Current
Low Capacitance
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 1000µs 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 20µs 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
Non–Linear 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10µA
Electrical Characteristics (Cont’d):
Maximum Ratings (T
A
= 25°C)
Continuous
Transient
Nominal
Varistor
Voltage
@ 1mA DC
Test Current
(Volts)
V
NOM
Characteristics
Maximum
Clamping
Voltage, V
C
@ Test Current
(8/20µs)
(Volts)
V
CL
NTE Type
Number
Case Diameter
RMS
Voltage
(Volts)
V
m
(AC)
DC
Voltage
(Volts)
V
m
(DC)
Energy
(10/1000µs)
(Joules)
W
TM
Peak Current
(8/20µs)
(Amps)
I
TM
Transient
Power
Dissipation
(Watts)
P
D
1V300
2V300
524V30
2V420
524V42
2V480
524V48
8.5mm
16mm
23mm
16mm
23mm
16mm
23mm
280
280
280
420
420
480
480
370
370
370
560
560
640
640
22.0
79.0
149.0
90.0
160.0
105.0
180.0
1200
4500
6500
4500
6500
4500
6500
470
470
470
680
680
750
750
740
740
740
1110
1110
1240
1240
0.25
0.60
1.00
0.60
1.00
0.60
1.00
Cautions:
NTE varistors short–circuit when subjected to surges beyond their peak current and energy ratings.
NTE varistors short–circuit when operated at steady–state voltages well beyond their voltage ratings, which may eventual-
ly result in open–circuiting leaving the circuit without protection.
The following precautions should be taken to minimize this potential hazard:
D
D
D
Fusing the varistor to limit high fault currents.
Protecting the surrounding circuitry by physical shielding.
Locating the varistor away from other components.
Typical Power Supply Circuit
100µH
D
+
0.1µF
–
150µF
LS
D
LL
LD
L
D
1V Series
H
.235
(6.0)
L
LL
LS
LD
.345
(9.0)
.475 1.000 .200 .024
(12.0) (25.4) (5.08) (0.6)
.787 1.000 .315
(20.0) (25.4) (8.0)
.031
(0.8)
H
2V Series
.699 .275
(17.8) (7.0)
524V Series .945 .291
(24.0) (7.4)
1.230 1.063 .394 .039
(31.0) (27.0) (10.0) (1.0)
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