English
Language : 

V321CA40PS Datasheet, PDF (2/5 Pages) Littelfuse – High Energy Industrial Disc Varistors > CA Series
Varistor Products
High Energy Industrial Disc Varistors > CA Series
CA Series Ratings & Specifications
Part
Size
Number
Device Branding
V251CA60
V271CA60
V321CA60
V421CA60
V481CA60
V511CA60
V571CA60
V661CA60
V751CA60
V881CA60
V112CA60
V142CA60
V172CA60
V202CA60
V242CA60
V282CA60
(mm)
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
Maximum Rating (85°C)
Continuous
Transient
VRMS
VDC
Energy
(2ms)
Peak
Current
(8/20μs)
V
V
W
I
M(AC)
M(DC)
TM
TM
(V)
(V)
(J)
(A)
250
330
880
50000
275
369
950
50000
320
420
1100
50000
420
560
1500
70000
480
640
1600
70000
510
675
1800
70000
575
730
2100
70000
660
850
2300
70000
750
970
2600
70000
880
1150
3200
70000
1100
1400
1700
2000
2400
2800
1400
1750
2150
2500
3000
3500
3800
5000
6000
7500
8800
10000
70000
70000
70000
70000
70000
70000
NOTE: Average power dissipation of transients should not exceed 2.5W for CA60 discs.
Specifications (25°C)
Varistor Voltage at 1mA
DC Test Current
Max Clamping
Volt Vc at 200A
Current
(8/20μs)
Typical
Capacitance
Min
(V)
354
389
462
610
670
735
805
940
1080
1290
1620
2020
2500
2970
3510
4230
V
NOM
(V)
390
430
510
680
750
820
910
1050
1200
1500
1800
2200
2700
3300
3900
4700
Max
(V)
429
473
561
748
825
910
1000
1160
1320
1650
2060
2550
3030
3630
4290
5170
V
C
(A)
620
680
760
1060
1160
1300
1420
1640
1880
2340
2940
3600
4300
5200
6200
7400
f = 1MHz
(pF)
10000
9000
7500
6000
5500
5000
4500
4000
3500
2700
2200
1800
1500
1200
1000
800
Power Dissipation Ratings
Peak Pulse Current Test Waveform
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
Figure 1
AMBIENT TEMPERATURE ( oC)
100
90
50
10
O1
Figure 2
T
T1
T2
TIME
Should transients occur in rapid succession, the average power
dissipation result 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.
0 = Virtual Origin of Wave
1
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T = Decay Time
2
CA Varistor Series
182
Revised: May 8, 2013
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ca.html for current information.