參數(shù)資料
型號(hào)： V250PA40A
廠商： Littelfuse, Inc.
元件分類(lèi)： 壓敏電阻
英文描述： Varistor Products - Base Mount
中文描述： 壓敏電阻器產(chǎn)品-基山
文件頁(yè)數(shù)： 3/5頁(yè)
文件大小： 86K
代理商： V250PA40A
134
www.littelfuse.com
Varistor Products
PA Varistor Series
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.
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 V130PA20A -
V660PA100A
200
6,000
5,000
4,000
3,000
1900
800
600
500
400
300
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
M
PEAK AMPERES (A)
2,000
10
3
MAXIMUM CLAMPING VOLTAGE
“A” SUFFIX
130 TO 660V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V320PA40A
V150PA20A
A40A
V660PA80A
V575PA80A
V510PA80A
V480PA80A
V420PA80A
V275PA40A
V250PA40A
V130PA20A
FIGURE 4. CLAMPING VOLTAGE FOR V130PA20C -
V660PA100C
200
6,000
5,000
4,000
3,000
1900
800
600
500
400
300
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
M
PEAK AMPERES (A)
2,000
10
3
MAXIMUM CLAMPING VOLTAGE
“C”SUFFIX
130 TO 660V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V150PA20C
V130PA20C
V660PA100C
V575PA80C
V510PA80C
V480PA80C
V420PA80C
V275PA40C
V250PA40C
V320PA40C
V350PA40C
Base Mount
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
V250PA40C 功能描述:壓敏電阻 390V 6500A 1000pF RoHS:否 制造商:EPCOS 產(chǎn)品:MLV 電壓額定值 DC:22 V 電壓額定值 AC:17 V 鉗位電壓:50 V 直徑: 峰值浪涌電流:30 A 浪涌能量額定值:75 mJ 電容:74.2 pF 工作溫度范圍:- 55 C to + 125 C 安裝:SMD/SMT 封裝:Reel
V250R0 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:
V250R10 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:
V250R12 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:
V250R25 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:
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