89
Varistor Products
©2009 Littelfuse, Inc.
Revision: November 5, 2009
89
Revision: November 5, 2009
©2008 Littelfuse, Inc.
UltraMOVTM Varistor Series
Radial Lead Varistors > UltraMOV
TM
Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
TMO
V
®
/
iTMO
V
®
SERIES
UL
TRAMO
V
TM
S
eries
Leadfree and RoHS
Compliant Models
Standard
Models
Maximum Rating (85°C)
Specifications (25°C)
Continuous
Transient
Varistor
Voltage at
1mA DC Test
Current
Maximum
Clamping
Voltage
8 x 20s
Typical
Capaci-
tance
RMS
Volts
DC
Volts
Energy
2ms
Peak Current
8 x 20s
Part
Number
Branding
Part
Number
Branding
V
M(AC)
V
M(DC)
W
TM
I
TM
1 x
Pulse
I
TM
2 x
Pulse
V
NOM
Min
V
NOM
Max
V
C
I
PK
f = 1MHz
(V)
(V)
(J)
(A)
(A)
(V)
(V) (V)
(A)
(pF)
V10E460P
P10V460
V10E460
10V460
460
615
90
3500
2500
675
825
1240
25
120
V14E460P
P14V460
V14E460
14V460
460
615
180
6000
4500
675
825
1240
50
220
V20E460P
P20V460
V20E460
20V460
460
615
360
10000
6500
675
825
1240
100
400
V10E510P
P10V510
V10E510
10V510
510
670
80
3500
2500
738
902
1355
25
110
V14E510P
P14V510
V14E510
14V510
510
670
165
6000
4500
738
902
1355
50
200
V20E510P
P20V510
V20E510
20V510
510
670
325
10000
6500
738
902
1355
100
350
V10E550P
P10V550
V10E550
10V550
550
745
90
3500
2500
819
1001
1500
25
100
V14E550P
P14V550
V14E550
14V550
550
745
180
6000
4500
819
1001
1500
50
180
V20E550P
P20V550
V20E550
20V550
550
745
360
10000
6500
819
1001
1500
100
300
V10E625P
P10V625
V10E625
10V625
625
825
100
3500
2500
900
1100
1650
25
90
V14E625P
P14V625
V14E625
14V625
625
825
200
6000
4500
900
1100
1650
50
160
V20E625P
P20V625
V20E625
20V625
625
825
400
10000
6500
900
1100
1650
100
250
UltraMOVTM Series Ratings & Specifications
(Continued...)
NOTE:
1. Average power dissipation of transients should not exceed 0.25W, 0.4W, 0.6W and 1.0W for 7mm, 10mm, 14mm, and 20mm model sizes, respectively.
Should transients occur in rapid succession, the average
power dissipation is the energy (watt-seconds) per pulse
times the number of pulses per second. The power so
developed must be within the specifications shown
on the Device Ratings and Specifications Table for the
specific device. Furthermore, the operating values
need to be derated at high temperatures as shown in
above. Because varistors can only dissipate a relatively
small amount of average power they are, therefore,
not suitable for repetitive applications that involve
substantial amounts of average power dissipation.
Power Dissipation Ratings
100
90
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90
100 110
120 130 140 150
AMBIENT TEMPERATURE (
o
C)
PERCENT OF R
A
TED V
ALUE
100
90
50
10
O
1
T
T
1
T
2
TIME
PERCENT OF PEAK V
ALUE
Peak Pulse Current Test Waveform
Current Energy and Power Derating Curve
0
1
= Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T
1
= Rise Time = 1.25 x T
T
2
= Decay Time
Example - For an 8/20 s Current Waveform:
8s = T
1
= Rise Time
20s = T
2
= Decay Time
Figure 1
Figure 2
Summary :
Power Dissipation Ratings 100 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 150 AMBIENT TEMPERATURE ( o C) PERCENT OF R A TED V ALUE 100 90 50 10 O 1 T T 1 T 2 TIME PERCENT OF PEAK V ALUE Peak Pulse Current Test Waveform Current Energy and Power Derating Curve 0 1 = Virtual Origin of Wave T = Time from 10% to 90% of Peak T 1 = Rise Time = 1.25 x T T 2 = Decay Time Example - For an 8/20 s Current Waveform: 8s = T 1 = Rise Time 20s = T 2 = Decay Time Figure 1 Figure 2
Tags :
100,power,825,current,time,specifications,dissipation,pulse,peak,6000,series,2500,aerage