T491X155M035AG データシートの表示（PDF） - KEMET

部品番号

コンポーネント説明

メーカー

T491X155M035AG

Surface Mount Capacitors

KEMET 

SOLID TANTALUM CHIP CAPACITORS

TANTALUM MnO2 COMPONENT PERFORMANCE CHARACTERISTICS (con’t.)

12. AC Operation

Permissible AC ripple voltage and current are

related to equivalent series resistance (ESR) and

power dissipation capability.

Permissible AC ripple voltage which may be

applied is limited by three criteria:

a. The positive peak AC voltage plus the DC

bias voltage, if any, must not exceed the DC

voltage rating of the capacitor.

FIGURE 9b ESR & Impedance (z) vs Frequency

ESR and Z are also affected by temperature. At

100 kHz, ESR decreases with increasing temper-

ature. The amount of change is influenced by the

size of the capacitor and is generally more pro-

nounced on smaller ratings.

Multiplier of 100KHz ESR

10

1

0.1

-50 -25 0 25 50 75 100 125

Temperature - Degrees Centigrade

FIGURE 10 Typical Effect of Temperature on 100 kHz ESR

11. AC Power Dissipation

Power dissipation is a function of capacitor size

and materials. Maximum power ratings have been

established for all case sizes to prevent overheat-

ing. In actual use, the capacitor’s ability to dissi-

pate the heat generated at any given power level

may be affected by a variety of circuit factors.

These include board density, pad size, heat sinks

and air circulation.

TABLE 5 Tantalum Chip Power Dissipation Ratings

b. The negative peak AC voltage, in combination

with the bias voltage, if any, must not exceed

the permissible reverse voltage ratings pre-

sented in Table 3.

c. The power dissipated in the ESR of the capa-

citor must not exceed the appropriate value

specified in Table 5.

Actual power dissipated may be calculated from

the following:

P = l2 R

Substituting I = E , P = E2R

Z

Z2

where:

I = rms ripple current (amperes)

E = rms ripple voltage (volts)

P = power (watts)

Z = impedance at specified frequency (ohms)

R = equivalent series resistance at specified

frequency (ohms)

Using P max from Table 5, maximum allowable

rms ripple current or voltage may be determined

aI (smfoalxlo) w= s:͌P max/R E (max) = Z ͌P max/R

These values should be derated at elevated tem-

peratures as follows:

Temperature

Derating Factor

85ЊC

.9

125ЊC

.4

ENVIRONMENTAL

13. Temperature Stability

TABLE 6 Temperature Stability Limits

Case Code

KEMET

EIA

R

2012-12

S

3216-12

T

3528-12

U

6032-15

V

7343-20

A

3216-18

B

3528-21

C

3062-28

D

7343-31

X

7343-43

E

7260-38

T530D

7343-31

T510X, T530X 7343-43

T510E, T530E 7260-38

Maximum Power Dissipation

mW @ +25°C w/+20°C Rise

25

60

70

90

125

75

85

110

150

165

200

255

270

285

Step

No.

1

2

3

4

5

6

Temp.

+25ЊC

-55ЊC

+25ЊC

+ 85ЊC

+125ЊC

+25ЊC

Leakage

ᮡ Capacitance Current

within specified within original

tolerance

limit

within ± 10% N/A

of initial value

within ± 5% within original

of initial value limit

within ± 10% within 10X

of initial value original limit

*within ± 12%or within 12X

20% of initial original limit

value

within ± 5% within original

of initial value limit

Dissipation

Factor

within original

limit

within original

limit**

within original

limit**

within original

limit***

within original

limit***

within original

limit

*+12% is standard. +15% or +20% applies to certain CV values

Contact KEMET representative for details.

**within 1.5x initial limit for extended CV values.

***within 1.15x initial limit for extended CV values.

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

9

Share Link: