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)： 10/100頁(yè)
文件大?。?/td> 4351K
代理商： T491C474M035AS
SOLID TANTALUM CHIP CAPACITORS
KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606, (864) 963-6300
ESR — Represents the actual ohmic series resis-
tance in series with the capacitance. Lead wires
and capacitor electrodes are contributing sources.
R
— Capacitor Leakage Resistance. Typically it
can reach 50,000 megohms in a tantalum capaci-
tor. It can exceed 10
12
ohms in monolithic ceram-
ics and in film capacitors.
R
— The dielectric loss contributed by dielectric
absorption and molecular polarization. It becomes
very significant in high frequency measurements
and applications. Its value varies with frequency.
C
— The inherent dielectric absorption of the
solid tantalum capacitor which typically equates to
1-2% of the applied voltage.
As frequency increases, X
continues to decrease
according to its equation above. There is unavoid-
able inductance as well as resistance in all capaci-
tors, and at some point in frequency, the reac-
tance ceases to be capacitive and becomes
inductive. This frequency is called the self-reso-
nant point. In solid tantalum capacitors, the reso-
nance is damped by the ESR, and a smooth,
rather than abrupt, transition from capacitive to
inductive reactance follows.
Typical ESR/Z frequency response curves are
shown in Figures 9a and 9b. These curves are
for selected ratings and represent typical T491
Series performance. Maximum limits for 100 kHz
ESR are listed in the part number tables for
each series. Note that the T494 Series offers low
ESR and the T495 Series is specially designed
for very low ESR performance. Refer to page 31
for more information. See also KEMET’s T510
Series low ESR ratings on page 40.
8
TANTALUM MnO
2
COMPONENT PERFORMANCE CHARACTERISTICS
(con’t.)
FIGURE 7a
Total Impedance of the Capacitor Below
Resonance
FIGURE 7b Total Impedance of the Capacitor Above
Resonance
To understand the many elements of a capaci-
tor, see Figure 8.
X
C
= 1 ohm
2 fC
where:
f = frequency, Hertz
C = capacitance, Farad
X
L
= 2 fL
where:
f = frequency, Hertz
L = inductance, Henries
A capacitor is a complex impedance consisting of
many series and parallel elements, each adding
to the complexity of the measurement system.
ESL — Represents lead wire and construction
inductance. In most instances (especially in solid
tantalum and monolithic ceramic capacitors) it is
insignificant at the basic measurement frequen-
cies of 120 and 1000 Hz.
FIGURE 8
The Real Capacitor
ESL
ESR
C
R
L
C
d
R
d
FIGURE 9a ESR & Impedance (Z) vs Frequency
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(xiě)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

*
*
*