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參數(shù)資料
| 型號： | VFR3VD31E131T51B |
| 英文描述： | VARISTOR 3PUNKT 130PF 25VDC 20MA |
| 中文描述： | 壓敏電阻3PUNKT 130PF 25VDC 20mA的 |
| 文件頁數(shù)： | 12/22頁 |
| 文件大?。?/td> | 825K |
| 代理商： | VFR3VD31E131T51B |
258
CG01-I
EMI LEADED FILTERS
EMI SUPPRESSION FILTERS
VARISTOR-CAPACITORS
DSS710 Series
The reason the 3-terminal structure provides excellent
high frequency characteristics.
Bypass capacitors should logically be able to remove
more noise as frequency increases. In actual fact, the
electrodes and lead wires of the capacitor have series
inductance as shown in Fig. 3, and this causes an LC
resonance when the frequency is between 1MHz and
50MHz. As a result, when the frequency is higher than
the self-resonance frequency, the noise suppression
capability of the bypass capacitor is drastically reduced
because the capacitor functions as inductor. To solve
this problem, the DSS series has one side of the capacitor
electrodes connected to two lead wires. This eliminates
the series inductance to the capacitor. Furthermore,
a ferrite bead is attached to each lead wire to form a
T-shaped filter, thus providing efficient noise suppression.
Appearance
Ferrite bead:
Absorbs high-frequency noise.
Varistor:
Bypasses high-voltage
surges to ground in order
to protect circuits.
Capacitor:
Bypasses high-frequency noise.
Symbol
223S
M
Conventional 2-Lead Capacitor
3-Lead Capacitor (DSS Series)
Fig. 3 Equivalent circuit
223S
M
3-TERMINAL STRUCTURE
APPLICATIONS
NOISE ABSORPTION EFFECT OF
VARISTOR-CAPACITOR
Waveform when a
Varistor-Capacitor is
not used (surge from
a noise simulator).
Varistor-Capacitor
is used to suppress
the surge
shown below
Waveform after the
noise passes through
a Varistor-Capacitor.
Protection of circuitry
is achieved.
The Varistor-Capacitor is capable of removing even
1200V surges and will withstand 2000V impulses.
SCALE:
200V/Div.
10NS/Div.
Systems
Lines to be connected to
Effects
Engine Controllers
Power lines, I/O for
low-frequency current
Protection of systems from excessive voltage. Prevents ignition noise,
lightning surges, etc. from causing malfunctions.
Automobile
Audio Equipment
Power lines, audio
output lines
Power lines, I/O lines for
low-frequency current
Protection of system from excessive voltage. Prevents ignition noise from
influencing audio current.
Protection of systems from excessive voltage. Prevents radiation and
conduction noise.
Computers
DC Motors
Power lines
Prevention of brush noise.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| VFR3VD31E131U31A | 功能描述:EMI/RFI 抑制器及鐵氧體 130pF 25volt +/-20% RoHS:否 制造商:Fair-Rite 產品:Ferrite Cores 阻抗:365 Ohms 容差: 最大直流電流: 最大直流電阻: 工作溫度范圍:- 55 C to + 125 C 封裝 / 箱體: 端接類型:SMD/SMT |
| VFR4100-5FZ | 制造商:SMC Corporation of America 功能描述:Valve, sol, 24VDC |
| VFR4210-1D | 制造商:SMC Corporation of America 功能描述:Valve, solenoid, non plug-in, base mt |
| VFR5100-3FZ | 制造商:SMC Corporation of America 功能描述:Valve, sol |
| VFR5100-3FZ-04T | 制造商:SMC Corporation of America 功能描述:Valve, sgl, plug-in, base mt, 1/3 |
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