C640C229JDG5TA datasheet, PDF - EEWORLD Datasheet

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C640C229JDG5TA: DescriptionMULTILAYER CERAMIC CAPACITORS/AXIAL & RADIAL LEADED; File Size181KB，9 Pages; ManufacturerKEMET; Websitehttp://www.kemet.com

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C640C229JDG5TA Overview

MULTILAYER CERAMIC CAPACITORS/AXIAL & RADIAL LEADED

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MULTILAYER CERAMIC CAPACITORS/AXIAL & RADIAL LEADED

Multilayer ceramic capacitors are available in a

variety of physical sizes and configurations, including

leaded devices and surface mounted chips. Leaded

styles include molded and conformally coated parts

with axial and radial leads. However, the basic

capacitor element is similar for all styles. It is called a

chip and consists of formulated dielectric materials

which have been cast into thin layers, interspersed

with metal electrodes alternately exposed on opposite

edges of the laminated structure. The entire structure is

fired at high temperature to produce a monolithic

block which provides high capacitance values in a

small physical volume. After firing, conductive

terminations are applied to opposite ends of the chip to

make contact with the exposed electrodes.

Termination materials and methods vary depending on

the intended use.

TEMPERATURE CHARACTERISTICS

Ceramic dielectric materials can be formulated with

Class III:

General purpose capacitors, suitable

a wide range of characteristics. The EIA standard for

for by-pass coupling or other applications in which

ceramic dielectric capacitors (RS-198) divides ceramic

dielectric losses, high insulation resistance and

dielectrics into the following classes:

stability of capacitance characteristics are of little or

no importance. Class III capacitors are similar to Class

II capacitors except for temperature characteristics,

Class I:

Temperature compensating capacitors,

which are greater than ± 15%. Class III capacitors

suitable for resonant circuit application or other appli-

have the highest volumetric efficiency and poorest

cations where high Q and stability of capacitance char-

stability of any type.

acteristics are required. Class I capacitors have

predictable temperature coefficients and are not

effected by voltage, frequency or time. They are made

KEMET leaded ceramic capacitors are offered in

from materials which are not ferro-electric, yielding

the three most popular temperature characteristics:

superior stability but low volumetric efficiency. Class I

C0G:

Class I, with a temperature coefficient of 0 ±

capacitors are the most stable type available, but have

30 ppm per degree C over an operating

the lowest volumetric efficiency.

temperature range of - 55°C to + 125°C (Also

known as “NP0”).

X7R:

Class II, with a maximum capacitance

Class II:

Stable capacitors, suitable for bypass

change of ± 15% over an operating temperature

or coupling applications or frequency discriminating

range of - 55°C to + 125°C.

circuits where Q and stability of capacitance char-

Z5U:

Class III, with a maximum capacitance

acteristics are not of major importance. Class II

change of + 22% - 56% over an operating tem-

capacitors have temperature characteristics of ± 15%

perature range of + 10°C to + 85°C.

or less. They are made from materials which are

ferro-electric, yielding higher volumetric efficiency but

Specified electrical limits for these three temperature

less stability. Class II capacitors are affected by

temperature, voltage, frequency and time.

characteristics are shown in Table 1.

SPECIFIED ELECTRICAL LIMITS

PARAMETER

Dissipation Factor: Measured at following conditions:

C0G — 1 kHz and 1 vrms if capacitance > 1000 pF

1 MHz and 1 vrms if capacitance

≤

1000 pF

X7R — 1 kHz and 1 vrms* or if extended cap range 0.5 vrms

Z5U — 1 kHz and 0.5 vrms

Dielectric Strength: 2.5 times rated DC voltage.

Insulation Resistance (IR): At rated DC voltage,

whichever of the two is smaller

Temperature Characteristics: Range, °C

Capacitance Change without

DC voltage

* 1 MHz and 1 vrms if capacitance

≤

100 pF on military product.

TEMPERATURE CHARACTERISTICS

C0G

X7R

Z5U

0.15%

2.5%

4.0%

Pass Subsequent IR Test

1,000 MΩ-µF

or 100 GΩ

-55 to +125

0 ± 30 ppm/°C

1,000 MΩ-µF

or 100 GΩ

-55 to +125

±15%

1,000 MΩ-µF

or 10 GΩ

+10 to +85

+22%, -56%

Table I

Multlayer Ceramic

Capacitors

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