參數(shù)資料
型號： T491A225K035AS
廠商： KEMET Corporation
英文描述： Surface Mount Capacitors
中文描述： 表面貼裝電容
文件頁數(shù)： 10/100頁
文件大?。?/td> 4351K
代理商： T491A225K035AS
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
T491A225K035AT Surface Mount Capacitors
T491A225M035AG Surface Mount Capacitors
T491A225M035AH Surface Mount Capacitors
T491A225M035AS Surface Mount Capacitors
T491A225M035AT Surface Mount Capacitors
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T491A225K035AT 功能描述:鉭質(zhì)電容器-固體SMD 2.2UF 35V 10% 3216-18 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 制造商庫存號: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
T491A225K035ZT 功能描述:鉭質(zhì)電容器-固體SMD 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 制造商庫存號: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
T491A225K035ZTZV17 制造商:KEMET Corporation 功能描述:CAP 2.2UF 35V 10% 3.2 X 1.6 X 1.6MM SMD 3216-18 - Tape and Reel
T491A225M006A 制造商:n/a 功能描述:SMT225A06 PAN= notes
T491A225M006AH 功能描述:鉭質(zhì)電容器-固體SMD 2.20UF 6.0V 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 制造商庫存號: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
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