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參數(shù)資料
| 型號(hào)： | LA |
| 廠商： | Littelfuse, Inc. |
| 英文描述： | Line Voltage Operation, Radial Lead |
| 中文描述： | 線電壓工作，徑向引線 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大小： | 272K |
| 代理商： | LA |
2
V
P
LA Varistor Series
Varistor Products
Line Voltage Operation, Radial Lead
53
www.littelfuse.com
Device Ratings and Specifications
(Continued)
Power Dissipation Ratings
Should transients occur in rapid succession, the average power dissipation
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.The
operating values of a MOV need to be derated at high temperatures as
shown in Figure 1. Because varistors only dissipate a relatively small
amount of average power they are not suitable for repetitive applications
that involve substantial amounts of average power dissipation.
V660LA10
V660LA50A
V660LA100B
V1000LA80A
V1000LA160B
NOTE: Average power dissipation of transients not to exceed 0.25W, 0.4W, 0.6W or 1W for model sizes 7mm, 10mm, 14mm and 20mm, respectively.
10
14
20
14
20
660L
660L50
660L100
1000L80
1000L160
660
660
660
1000
1000
850
850
850
1200
1200
70
140
250
220
360
2500
4500
6500
4500
6500
940
940
940
1425
1425
1250
1250
1250
1800
1600
1650
1650
1650
2700
2420
25
50
100
50
100
70
200
400
130
250
PART
NUMBER
MODEL
SIZE
DISC
DIA.
(mm)
DEVICE
MODEL
NUMBER
BRAND-
ING
MAXIMUM RATING (85
o
C)
CONTINUOUS
SPECIFICATIONS (25
o
C)
TRANSIENT
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
V
NOM
MIN
(V)
MAXIMUM
CLAMPING
VOLTAGE
8 x 20
μ
s
TYPICAL
CAPACI-
TANCE
f = 1MHz
V
RMS
V
DC
ENERGY
10 x 1000
μ
PEAK
CURRENT
8 x 20
μ
s
V
M(AC)
(V)
V
M(DC)
(V)
W
TM
(J)
I
TM
(A)
V
NOM
MAX
V
C
(V)
I
PK
(A)
C
(pF)
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 1. CURRENT, ENERGY AND POWER DERATING
CURVE
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
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