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參數(shù)資料
| 型號： | ML |
| 廠商： | Littelfuse, Inc. |
| 英文描述： | Multilayer Transient Voltage Surge Suppressors |
| 中文描述： | 多層瞬態(tài)電壓浪涌抑制器 |
| 文件頁數(shù)： | 4/11頁 |
| 文件大?。?/td> | 182K |
| 代理商： | ML |
Temperature De-rating
When transients occur in rapid succession, the average power dissipa-
tion 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. For applications exceeding 125
o
C ambient temperature, the peak
surge current and energy ratings must be derated as shown in Figure 1.
100
80
60
40
20
0
-55
50
60
70
80
90
100
110
120
130
140 150
P
AMBIENT TEMPERATURE (
o
C)
FIGURE 1. PEAK CURRENT AND ENERGY
DERATING CURVE
t
1
t
2
100
50
0
O
1
TIME
P
O
1
= VIRTUAL ORIGIN OF WAVE
t = TIME FROM 10% TO 90% OF PEAK
t
1
= VIRTUAL FRONT TIME = 1.25 x 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 2. PEAK PULSE CURRENT TEST WAVEFORM
FOR CLAMPING VOLTAGE
t
FIGURE 3. LIMIT V-I CHARACTERISTIC FOR V5.5MLA0402 TO V18MLA0402
100
10
1
μ
A
CURRENT (A)
V
MAXIMUM LEAKAGE
10
μ
A
100
μ
A
1mA
10mA
100mA
1A
10A
100A
MAXIMUM CLAMPING VOLTAGE
V18MLA0402
V14MLA0402
V09MLA0402
V5.5MLA0402
ML Varistor Series
Surface Mount Varistors
Multilayer Transient Voltage Surge Suppressors
143
www.littelfuse.com
3
S
V
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