Varistor Products
Surface Mount Varistors > CH Series
Peak Pulse Current Test Waveform
0 1 = Virtual Origin of Wave
100
90
50
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 μ s Current Waveform:
8 μ s = T 1 = Rise Time
20 μ s = T 2 = Decay Time
10
Figure 2
O 1
T
T 1
T 2
TIME
Clamping Voltage for V22CH8 – V68CH8
Clamping Voltage for V120CH8 – V430CH8
T A = -55 o C TO 125 o C
500
400
300
200
100
90
80
70
60
50
40
30
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
22 TO 56V N(DC) RATING
T A = -55 o C TO 125 o C
V68CH8
V56CH8
V47CH8
V39CH8
V33CH8
V27CH8
V22CH8
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
100 TO 430V N(DC) RATING
V430CH8
V390CH8
V360CH8
V240CH8
V220CH8
V200CH8
200 V180CH8
20
V150CH8
V120CH8
10
10 -3
10 -2
10 -1
10 0
10 1
10 2
10 3
100
10 -3
10 -2
10 -1
10 0
10 1
10 2
10 3
10 4
Figure 3
PEAK AMPERES (A)
Figure 4
PEAK AMPERES (A)
Pulse Rating Curves
Surge Current Rating Curves for V22CH8 - V56CH8
Surge Current Rating Curves for V120CH8 - V430CH8
500
200
100
50
20
1
2
10
10 2
10 3
MODEL SIZE 5 x 8mm
V22CH8 - V56CH8
10 4
10 5
10 6
2,000
1,000
500
200
100
1
2
10
MODEL SIZE 5 x 8mm
V120CH8 - V430CH8
10 2
10 3
10 4
10 5
10
50
5
2
1
0.5
INDEFINITE
20
10
5
2
10 6
INDEFINITE
Figure 5
0.2
20
100
1,000
IMPULSE DURATION (μs)
10,000
Figure 6
1
20
100
1,000
IMPULSE DURATION (μs)
10,000
NOTE: If pulse ratings are exceeded, a shift of V N(DC) (at speci?ed current) of more than +/-10% could result. This type of shift, which normally results in a decrease of V N(DC) , may result in
the device not meeting the original published speci?cations, but it does not prevent the device from continuing to function, and to provide ample protection.
?2010 Littelfuse, Inc.
Speci?cations are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
Revision: August 30, 2010
CH Varistor Series
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