CSR09B565JS datasheet(75/84 Pages) KEMET

75 / 84 page

INTRODUCTION

KEMET solid tantalum capacitors are identified by the

initial “T,” followed by a unique “Series” number; for exam-

ple, T110, T322, T350, etc. Each Series denotes a gener-

al physical form and type of encapsulation, as well as lim-

its on dimensions and certain electrical characteristics

under standard conditions of 25°C, 50% relative humidity,

and one atmosphere pressure. Specific requirements are

set forth in the respective Product Series in this catalog. All

Military products are 100% electrically screened for the

parameters shown in the respective product section. For

non-military product, all series are 100% screened for

leakage, capacitance and dissipation factor. All Series are

inspected to electrical limits using a minimum .1% AQL

sampling plans, according to the Military Standard

MIL-STD-105, even after 100% testing. This sampling

plan, to the best of KEMET Electronics’ knowledge, meets

or exceeds the generally accepted industry standard for

similar products. KEMET capacitors may also be supplied,

with prior agreement, to meet specifications with require-

ments differing from those of KEMET catalogs.

Reference

ESR values are provided but are NOT 100% screened

These Notes apply generally to all KEMET solid tan-

talum capacitors and illustrate typical performance under

normal application conditions, except where noted.

Certain Series will respond differently to various environ-

mental conditions. For example, hermetically sealed

series are relatively immune to humidity effects, while

plastic-encased series are not. The intent of these Notes

is not to delineate such differences but to provide general-

ized information concerning performance characteristics.

1. GENERAL APPLICATION CLASS

Solid tantalum capacitors are usually applied in cir-

cuits where the AC component is small compared to the

DC component. Typical uses known to KEMET Electronics

include blocking, by-passing, decoupling, and filtering.

They are also used in timing circuits. If two of these polar

capacitors are connected “back-to-back” (i.e., negative-to-

negative or positive-to-positive), the pair may be used in

AC applications (as a non-polar device).

2. STORAGE CONDITIONS

Capacitors may be stored without applied voltage

over the operating temperature range specified in the cat-

alogs for each Series. The range is from -55 to +125° C for

all Series.

Tantalum capacitors do not lose capacitance from the

“de-forming” effect as do liquid-electrolytic capacitors.

Storage at high temperature may cause a small, tempo-

rary increase in leakage current (measured under stan-

dard conditions), but the original value is usually restored

within a few minutes after application of rated voltage.

Series which are not hermetically sealed exhibit

reversible changes in parameters with respect to relative

humidity (RH). Capacitance increases with increasing

humidity. The limiting change, reached upon establish-

ment of equilibrium with the environment, is approximate-

ly -5% to +12% over the range from 25% to 95% RH,

referred to the standard 50% RH. The amount of change

is dependent upon size (capacitance and voltage rating,

ie: CV product); small sizes might change no more than

±5%. Equilibrium at such extremes is seldom attained by

plastic-cased capacitors, and the change in capacitance is

consequently less. The rate of response to humidity

changes

increases

with

increasing

temperature.

Dissipation factor also increases with increasing RH. The

limiting change, at equilibrium with 95% RH, is approxi-

mately 50%.

DC leakage current may rise upon exposure to a

combination of high temperature and high humidity, but is

normally restored by voltage conditioning under standard

conditions. The increase will be greater than that experi-

enced under temperature influence alone because of con-

duction through absorbed water.

Hermetically-sealed and non-hermetic Series may be

affected by absorption of water on external insulating sur-

faces. The water film may also attract a layer of dust from

the air, increasing the effect. The most sensitive parame-

ter is leakage current.

3. POLARITY

These capacitors are inherently polar devices and

may be permanently damaged or destroyed if connected

with the wrong polarity. The positive terminal is identified

on the capacitor body by a polarity mark and the capacitor

body may include an obvious geometrical shape.

However, some Series contain two capacitors connected

(negative-to-negative) to form “non-polar” capacitors.

Rated voltage (see para. 8) may be applied to these

Series in either direction.

4. OPERATING ENVIRONMENT

Most of the discussion under “Storage Conditions”

will apply also when capacitors are operated within the

applicable electrical ratings described below. The tempo-

rary increase in leakage current (at standard conditions)

following elevated-temperature exposure is not observed,

however, if the capacitors are operated with adequate DC

voltage applied.

5. CAPACITANCE

Capacitance is measured at 120 Hz and 25° C with

up to 1 volt rms applied. Note that, in either operation,

peak AC plus DC bias must not exceed either rated volt-

age (normally polarized) or 15% of rated voltage in the

reverse direction at 25°C. Measurement circuits are of

high impedance, however, and under these conditions 1

volt rms may be applied even to 6 volt capacitors (23%

peak reversal) without a DC bias. DC bias is thus normal-

ly not used, except when rated voltage is below 6 volts and

the AC signal level exceeds 0.3 vrms. However,

MIL-C-39003 provides for up to 2.2 volts DC.

DC bias causes a small reduction in capacitance, up

to about 2% when full rated voltage is applied as bias. DF

is also reduced by the presence of DC; rated voltage may

cause a decrease in DF of about 0.2% (e.g., a decrease

from 3.6 to 3.4% DF).

Capacitance changes very little below 1 kHz but

decreases more noticeably at higher frequencies. Larger

capacitance values decline more rapidly than small rat-

ings. The effect of frequency upon capacitance is shown in

Figure 1.

KEMET

APPLICATION NOTES FOR TANTALUM CAPACITORS

KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606 (864) 963-6300

Frequency - Hertz

10K

100

0.9

1.0

Figure 1.

Normal Effect of Frequency upon Capacitance

Reference

1.0 at 120Hz

CSR09B565JS 数据表(PDF) 75 Page - Kemet Corporation

CSR09B565JS 数据表(HTML) 75 Page - Kemet Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84

数据表下载