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)
NTE [ NTE ELECTRONICS ]
