CERAMIC CAPACITORS

48

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Taping : dimensions

Page revised 02/21

1

2

5

10

20

50

100

200

500

–55–40

0

20

85

125155

Tg d (x10–4)

V

(°C)

10

20

50

100

200

500

1102

10

103

55

22

2

55

N (kHz)

Tg d (x10–4)

X7R: LOSS TANGENT CHANGE VS TEMPERATURE

X7R: LOSS TANGENT CHANGE VS FREQUENCY

These typical curves are examples of admissible currents for one family of chip

capacitors (size 3333). For other curves and products or for further informa-

tion, please contact us.

Note: for the calculations, we have considered that the terminations are directly connected to an in-

finite heat sink. In other words, the thermal resistance of the circuit itself which depends on its type

and design has not been taken into account. Moreover, the ambient temperature taken is 25°C.

The ESR (Equivalent Serial Resistance) typical curves are given, here for SMD

(chip) capacitors. Regarding the curves for the leaded capacitors, they are rath-

er the same. Indeed, due to the resistivity of the raw material used and the wire

diameters, the resistance of the wires is much lower than the ESR of the chips.

So, in a first approach, their influence can be considered as negligible.

0.01

0.01

0.1

1

10

100

0.1

1

10

100

I

RMS (A)

Frequency (MHz)

10nF

3.3nF

1nF

10nF

0.1nF

33nF

0.01

0.01

0.1

1

10

100

10

1

0.1

100

1000

10000

ESR ( )

Frequency (MHz)

0.33nF

1nF

3.3nF

10nF

33nF

0.1nF

X7R: MAXIMUM ADMISSIBLE CURRENT VS FREQUENCY

X7R: ESR VS FREQUENCY

General Information