參數(shù)資料
型號(hào)： T491C474M035AS
廠商： KEMET Corporation
英文描述： Surface Mount Capacitors
中文描述： 表面貼裝電容
文件頁(yè)數(shù)： 61/100頁(yè)
文件大小： 4351K
代理商： T491C474M035AS
DC Leakage Current is the current that flows
through the capacitor dielectric after a five minute
charging period at rated voltage. Leakage is meas-
ured at 25°C with full rated voltage applied to the
capacitor through a 1000 ohm resistor in series with
the capacitor.
DC Leakage Current does increase with tempera-
ture. The limits for 85°C @ Rated Voltage and
125°C are both 2 times the 25°C limit.
7.
Dissipation Factor (DF)
Refer to part number tables for maximum DF limits.
Dissipation factor is measured at 120 Hz, up to 1.0
volt rms maximum. Dissipation factor is the ratio of
the equivalent series resistance (ESR) to the capaci-
tive reactance, (X
c
) and is usually expressed as a
percentage. It is directly proportional to both capaci-
tance and frequency. Dissipation factor loses its
importance at higher frequencies, (above about 1
kHz), where impedance (Z) and equivalent series
resistance (ESR) are the normal parameters of con-
cern.
DF is also referred to as tan
δ
or "loss tangent."
The "Quality Factor," "Q", is the reciprocal of DF.
8.
Equivalent Series Resistance (ESR) and
Impedance (Z)
The Equivalent Series Resistance (ESR) of the AO-
CAP is much lower than standard Tantalum caps
because the polymer cathode has much higher con-
ductivity. ESR is not a pure resistance, and it
decreases with increasing frequency.
Total impedance of the capacitor is the vector sum of
capacitive reactance (X
c
) and ESR below reso
nance; above resonance total impedance is the vec-
tor sum of inductive reactance (X
L
) and ESR.
To understand the many elements of a capacitor,
see Figure 3.
Figure 3 The Real Capacitor
A capacitor has a complex impedance consisting of
many series and parallel elements, each adding to
the complexity of the measurement system.
ESL
- Represents inductance. In most instances it is
significant at the basic measurement frequencies of
120 and 1000 Hz.
ESR
- Represents the ohmic resistance in series
with the capacitance. Lead attachment and capacitor
electrodes are contributing sources.
DF = Xc
Where:
= 2
π
fCR
DF = Dissipation Factor
R
= Equivalent Series Resistance (Ohms)
Xc = Capacitive Reactance(Ohms)
f
= Frequency (Hertz)
C
= Capacitance (Farads)
R
X
c
ESR
δ
θ
Xc= 2
π
fC (Ohms)
Where:
f = frequency (Hertz)
C = capacitance (Farad)
1
Figure 2a Total Impedance of the Capacitor
Below Resonance
XL= 2
π
fL (Ohms)
Where:
f = frequency (Hertz)
L = inductance (Henries)
δ
θ
X
L
Z
Figure 2b Total Impedance of the Capacitor
Above Resonance
ESL
ESR
C
R
L
C
d
R
d
ESR
KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606, (864) 963-6300
ALUMINUM ORGANIC CAPACITORS
Performance Characteristics
5
9
A
相關(guān)PDF資料
PDF描述
T491C474M035AT Surface Mount Capacitors
T491D104K035AG Surface Mount Capacitors
T491D104K035AH Surface Mount Capacitors
T491D104K035AS Surface Mount Capacitors
T491D104K035AT Surface Mount Capacitors
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T491C474M035AT 制造商:KEMET 制造商全稱:Kemet Corporation 功能描述:Surface Mount Capacitors
T491C474M050AT 功能描述:鉭質(zhì)電容器-固體SMD 50volts 0.47uF 20% RoHS:否 制造商:AVX 電容:100 uF 電壓額定值:20 V ESR: 容差:10 % 外殼代碼 - in:2917 外殼代碼 - mm:7343 高度:4.1 mm 制造商庫(kù)存號(hào):E Case 工作溫度范圍:- 55 C to + 125 C 系列:TBM 產(chǎn)品:Tantalum Solid Low ESR Commercial Grade 封裝:Bulk
T491C474M050AT4394 制造商:KEMET Corporation 功能描述:.470UF 50.0V - Boxed Product (Development Kits)
T491C474M050ZT 功能描述:鉭質(zhì)電容器-固體SMD .470UF 50.0V RoHS:否 制造商:AVX 電容:100 uF 電壓額定值:20 V ESR: 容差:10 % 外殼代碼 - in:2917 外殼代碼 - mm:7343 高度:4.1 mm 制造商庫(kù)存號(hào):E Case 工作溫度范圍:- 55 C to + 125 C 系列:TBM 產(chǎn)品:Tantalum Solid Low ESR Commercial Grade 封裝:Bulk
T491C474M050ZT7280 制造商:KEMET Corporation 功能描述:Cap Tant Solid 0.47uF 50V C CASE 20% (6 X 3.2 X 2.5mm) SMD 6032-28 125
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*