CERAMIC CAPACITORS

49

www.exxelia.com

General characteristics

Page revised 11/22

C4xx DIELECTRIC

This ceramic is a negative temperature coefficient dielectric (–2,200 ppm/°C).

Its advantage is that it combines the high dielectric constant of an X7R dielectric

with the stability of an NPO dielectric. As the C4xx ceramic features low dissi-

pation factor it is recommended for AC line filtering from 110 Vrms to 230 Vrms,

20 to 400 Hz, for high power RF at high voltage up to 5,000 V and for pulse ap-

plications.

C4xx: TEMPERATURE COEFFICIENT

C4xx: VOLTAGE COEFFICIENT

COMPARISON OF CAPACITANCE VALUE UNDER RATED VOLTAGE AT 125°C

COMPARISON OF SELF-HEATING AT 400 Hz BETWEEN C4xx AND X7R DIELECTRICS

–30

–55

–35

–15

5

25

45

65

85

105

125

–25

–20

–15

–10

–5

0

5

10

15

20

∆C/C (%)

V

(°C)

Nominal

Limit

20

25

30

35

40

45

50

55

Temperature (°C)

Voltage

Un

2 Un

3 Un

X7R

C4xx

–8

–6

–4

–2

0

∆C/C (%)

–16

0

20

40

60

80

100

–14

–12

–10

Percentage of rated voltage (%)

Standard

Extended

General Information

0.1

1

10

100

1000

Size 1812

Size 4040

Size 16080

NPO

C4xx

X7R

NPO

NPO

C4xx

C4xx

X7R

X7R