Varistor Products
Axial Lead
MA Varistor Series
100
90
O
= Virtual Origin of Wave
1
T = Time From 10% to 90% of Peak
T
T
= Virtual Front time = 1.25 • t
= Virtual Time to Half Value (Impulse Duration)
1
2
50
Example: For an 8/20µs Current Waveform:
8µs = T = Virtual Front Time
1
20µs = T = Virtual Time to Half Value
2
10
O
T
TIME
1
T
1
T
2
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
Transient V-I Characteristics Curves
800
4,000
MAX CLAMPINGVOLTAGE
DISC SIZE 3mm
V100MA4A/S
V82MA3A/S
V68MA3A/S
V56MA2A/S
MAX CLAMPINGVOLTAGE
DISC SIZE 3mm
V430MA3A
V390MA3A
V330MA2A
V270MA2A
V220MA2A
600
400
300
18 TO 100V
RATING
120 TO 430V
RATING
N(DC)
N(DC)
o
o
o
o
T
= -55 C TO 85 C
2,000
1,500
T
= -55 C TO 85 C
A
A
200
150
1,000
800
600
100
80
400
200
100
60
V47MA2A/S
V39MA2A/S
V33MA1A/S
40
30
V27MA1A/S
V180MA1A
V150MA1A
V120MA1A/S
V22MA1A/S
V18MA1A/S
20
10
-2
-1
0
1
2
-2
10
-1
0
1
2
10
10
PEAK AMPERES (A)
10
10
10
10
PEAK AMPERES (A)
10
10
FIGURE 3. CLAMPINGVOLTAGE FOR V18MA1A/S- V100MA4A/S
FI GURE 4. CLAMPINGVOLTAGE FORV120MA1A/S-
V430MA3A
600
4,000
MAX CLAMPINGVOLTAGE
500
MAXIMUM CLAMPINGVOLTAGE
DISC SIZE 3mm
400
3,000
2,000
DISC SIZE 3mm
120 TO 430V
18 TO 100V
RATING
RATING
= -55 C TO 85 C
N(DC)
N(DC)
V100MA4B
V82MA3B
V68MA3B
o
o
o
o
T
= -55 C TO 85 C
300
T
A
A
200
V430MA7B
V390MA6B
V330MA5B
V270MA4B
V220MA4B
1,000
900
800
700
600
100
90
500
400
V180MA3B
80
70
V150MA2B
60
50
V56MA2B
V47MA2B
V120MA2B
300
V39MA2B
40
V33MA1B
200
V27MA1B
30
V22MA1B
V18MA1B
20
10
100
10
-3
-2
10
-1
10
0
1
2
3
-3
-2
10
-1
10
0
1
2
3
10
PEAK AMPERES (A)
10
10
10
10
10
10
10
PEAK AMPERES (A)
FIGURE 5. CLAMPINGVOLTAGE FOR V18MA1B - V100MA4B
FIGURE 6. CLAMPINGVOLTAGE FOR V120MA2B - V430MA7B
130
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