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參數(shù)資料
| 型號(hào)： | V151NA34 |
| 廠商： | Littelfuse, Inc. |
| 英文描述： | CAP METAL POLYPRO .43UF 630V 5% |
| 中文描述： | 壓敏電阻器產(chǎn)品-高能工業(yè)廣場(chǎng)光盤 |
| 文件頁(yè)數(shù)： | 3/5頁(yè) |
| 文件大?。?/td> | 89K |
| 代理商： | V151NA34 |
124
www.littelfuse.com
Varistor Products
NA Varistor Series
High Energy Industrial Square Disc
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.The operating values must be derated as
shown in Figure 1.
Transient V-I Characteristics Curves
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
CURVE
100
90
80
70
60
50
40
30
20
10
0
-55
50
60
70
AMBIENT TEMPERATURE (
o
C)
80
90
100
110 120
130 140
150
P
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
100
90
50
10
O
1
T
T
1
T
2
TIME
P
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 8/20
μ
s Current Waveform:
8
μ
s = T
1
= Virtual Front Time
20
μ
s = T
2
= Virtual Time to Half Value
FIGURE 3. CLAMPING VOLTAGE FOR V131NA34 - V751NA34
V
10000
1000
100
CURRENT (A)
V751NA34
V661NA34
V131NA34
V321NA34
V511NA34
V481NA34
V571NA34
T
A
= -55
o
C TO 85
o
C
MAXIMUM CLAMPING VOLTAGE
VARISTOR SIZE 34mm
130 TO 750 V
M(AC)
RATING
V271NA34
V251NA34
V151NA34
V421NA34
-5
-4
1E-3
0.01
0.1
1
10
100
1,000
10,000
100,000
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