CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Device Ratings and Specifications
MAXIMUM RATINGS (85
o
C)
CONTINUOUS
TRANSIENT
ENERGY
(10/1000µs)
W
TM
(J)
0.06
0.07
0.06
0.09
0.10
0.09
0.10
0.11
0.10
0.13
0.15
0.14
0.16
0.18
0.17
0.19
0.21
0.19
0.23
0.25
0.23
0.26
0.30
0.27
0.33
0.37
0.34
PEAK
CURRENT
(8/20µs)
I
TM
(A)
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
VARISTOR VOLTAGE AT
1mA DC TEST
CURRENT
MIN
(V)
14
15
15
16
19
19
21
24
24
26
29.5
29.5
31
35
35
37
42
42
44
50
50
54
61
61
65
73
73
V
N(DC)
(V)
18
18
18
22
22
22
27
27
27
33
33
33
39
39
39
47
47
47
56
56
56
68
68
68
82
82
82
MAX
(V)
23
21
21
28
26
26
34
31
31
40
36.5
36.5
47
43
43
57
52
52
68
62
62
82
75
75
99
91
91
SPECIFICATIONS (25
o
C)
MAX CLAMPING
VOLTAGE
V
C
AT 2.0A
(8/20µs)
V
C
(V)
49
44
49
55
51
55
67
59
67
73
67
73
86
79
86
99
90
99
117
108
117
138
127
138
163
150
163
V
RMS
PART
NUMBER
V18MA1A
V18MA1B
V18MA1S
V22MA1A
V22MA1B
V22MA1S
V27MA1A
V27MA1B
V27MA1S
V33MA1A
V33MA1B
V33MA1S
V39MA2A
V39MA2B
V39MA2S
V47MA2A
V47MA2B
V47MA2S
V56MA2A
V56MA2B
V56MA2S
V68MA3A
V68MA3B
V68MA3S
V82MA3A
V82MA3B
V82MA3S
V
M(AC)
BRAND
18A
18B
18S
22A
22B
22S
27A
27B
27S
33A
33B
33S
39A
39B
39S
47A
47B
47S
56A
56B
56S
68A
68B
68S
82A
82B
82S
(V)
9
10
10
10
14
14
13
17
17
18
20
20
22
25
25
27
30
30
32
35
35
38
40
40
45
50
50
V
DC
V
M(DC)
(V)
13
14
14
15
18
18
19
22
22
23
26
26
28
31
31
34
38
38
40
45
45
48
56
56
60
66
66
TYPICAL
CAPACI-
TANCE
f = 1MHz
(pF)
550
550
550
410
410
410
370
370
370
300
300
300
250
250
250
210
210
210
180
180
180
150
150
150
120
120
120
4-89
MA Series
Device Ratings and Specifications
(Continued)
SPECIFICATIONS (25
o
C)
MAX CLAMPING
VOLTAGE
V
C
AT 2.0A
(8/20µs)
V
C
(V)
200
185
200
220
205
220
255
240
310
290
380
360
460
440
570
540
670
640
740
700
MAXIMUM RATINGS (85
o
C)
CONTINUOUS
TRANSIENT
ENERGY
(10/1000µs)
W
TM
(J)
0.40
0.45
0.42
0.40
0.50
0.46
0.50
0.60
0.60
0.70
0.80
0.90
0.90
1.00
1.00
1.10
1.20
1.30
1.50
1.70
PEAK
CURRENT
(8/20µs)
I
TM
(A)
40
40
40
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
V
RMS
PART
NUMBER
V100MA4A
V100MA4B
V100MA4S
V120MA1A
V120MA2B
V120MA2S
V150MA1A
V150MA2B
V180MA1A
V180MA3B
V220MA2A
V220MA4B
V270MA2A
V270MA4B
V330MA2A
V330MA5B
V390MA3A
V390MA6B
V430MA3A
V430MA7B
V
M(AC)
BRAND
100
101
102
120
121
122
150
151
180
181
220
221
270
271
330
331
390
391
430
431
(V)
57
60
60
72
75
75
88
92
105
110
132
138
163
171
188
200
234
242
253
264
V
DC
V
M(DC)
(V)
72
81
81
97
101
101
121
127
144
152
181
191
224
235
257
274
322
334
349
365
VARISTOR VOLTAGE AT
1mA DC TEST
CURRENT
MIN
(V)
80
90
90
102
108
108
127
135
153
162
187
198
229
243
280
297
331
351
365
387
V
N(DC)
(V)
100
100
100
120
120
120
150
150
180
180
220
220
270
270
330
330
390
390
430
430
MAX
(V)
120
110
110
138
132
132
173
165
207
198
253
242
311
297
380
363
449
429
495
473
TYPICAL
CAPACI-
TANCE
f = 1MHz
(pF)
100
100
100
40
40
40
32
32
27
27
21
21
17
17
14
14
12
12
11
11
NOTE: Average power dissipation of transients not to exceed 200mW.
Power Dissipation Ratings
Should transients occur in rapid succession, the average
power dissipation required is simply 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 Figure 1.
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.
1.
100
PERCENT OF RATED VALUE
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)
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
CURVE
4-90
MA Series
PERCENT OF PEAK VALUE
100
90
50
O
1
= Virtual Origin of Wave
T = Time From 10% to 90% of Peak
T
1
= Virtual Front time = 1.25
•
t
T
2
= Virtual Time to Half Value (Impulse Duration)
Example: For an 8/20µs Current Waveform:
8µs = T
1
= Virtual Front Time
20µs = T
2
= Virtual Time to Half Value
10
O
1
T
T
1
T
2
TIME
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
Transient V-I Characteristics Curves
800
600
MAXIMUM PEAK VOLTS (V)
400
300
200
150
100
80
60
40
30
20
10
-2
10
-1
V47MA2A/S
V39MA2A/S
V33MA1A/S
V27MA1A/S
V22MA1A/S
V18MA1A/S
10
0
PEAK AMPERES (A)
10
1
10
2
MAX CLAMPING VOLTAGE
DISC SIZE 3mm
18 TO 100V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
V100MA4A/S
V82MA3A/S
V68MA3A/S
V56MA2A/S
4,000
MAX CLAMPING VOLTAGE
DISC SIZE 3mm
120 TO 430V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
V430MA3A
V390MA3A
V330MA2A
V270MA2A
V220MA2A
MAXIMUM PEAK VOLTS (V)
2,000
1,500
1,000
800
600
400
200
V180MA1A
V150MA1A
V120MA1A/S
100
10
-2
10
-1
10
0
PEAK AMPERES (A)
10
1
10
2
FIGURE 3. CLAMPING VOLTAGE FOR V18MA1A/S - V100MA4A/S
FIGURE 4. CLAMPING VOLTAGE FOR V120MA1A/S -
V430MA3A
600
500
400
MAXIMUM PEAK VOLTS (V)
300
200
MAXIMUM PEAK VOLTS (V)
MAX CLAMPING VOLTAGE
DISC SIZE 3mm
18 TO 100V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
4,000
3,000
V100MA4B
V82MA3B
V68MA3B
2,000
MAXIMUM CLAMPING VOLTAGE
DISC SIZE 3mm
120 TO 430V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
V430MA7B
V390MA6B
V330MA5B
V270MA4B
V220MA4B
V180MA3B
V150MA2B
V120MA2B
100
90
80
70
60
50
40
30
20
10
-3
V56MA2B
V47MA2B
V39MA2B
V33MA1B
V27MA1B
V22MA1B
V18MA1B
10
-2
10
-1
10
0
10
1
PEAK AMPERES (A)
10
2
10
3
1,000
900
800
700
600
500
400
300
200
100
10
-3
10
-2
10
-1
10
0
10
1
PEAK AMPERES (A)
10
2
10
3
FIGURE 5. CLAMPING VOLTAGE FOR V18MA1B - V100MA4B
FIGURE 6. CLAMPING VOLTAGE FOR V120MA2B - V430MA7B
4-91
MA Series
Pulse Rating Curves
50
20
10
SURGE CURRENT (A)
SURGE CURRENT (A)
10
5
2
1
0.5
0.2
0.1
20
INDEFINITE
0.2
0.1
100
1,000
IMPULSE DURATION (µs)
10,000
20
100
1,000
IMPULSE DURATION (µs)
10,000
10
2
10
3
10
4
10
5
10
6
20
10
5
2
1
0.5
INDEFINITE
1
2
100
DISC SIZE 3mm
V18MA1A - V100MA4B
50
2
10
10
2
1
DISC SIZE 3mm
V120MA1A - V430MA7B
10
3
10
4
10
5
10
6
FIGURE 7. SURGE CURRENT RATING CURVES FOR V18MA
SERIES - V100MA SERIES
FIGURE 8. SURGE CURRENT RATING CURVES FOR
V120MA SERIES - V430MA SERIES
NOTE: If pulse ratings are exceeded, a shift of V
N(DC)
(at specified 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 specifications, but it does not prevent the device from
continuing to function, and to provide ample protection.
便携式数字数据采集系统（PDDAS）使用了LabVIEW实时模块和PXI，以控制风洞测试和采集记录来自128个不同通道的空气压力数据 "通过LabVIEW实时模块，可以在各种操作情况下获得采集空气压力数据及向风洞提供反馈控制信号所需的确定性响应时间。" – Dave Scheibenhoffer, G Systems 挑战: 用一个可采集、分析和存储来自下一代喷气式战斗机引擎设计的动...[详细]
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