Catalogues - avx-medium-power-film-capacitors

Catalogue AVX Medium Power Film Capacitors

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Medium Power Film capacitors

General Description

CAPACITANCE FOR POLYESTER DIELECTRIC

Capacitance of polyester capacitors is a function of temperature and frequency (see the curves).

/aV№(

E in

^8 O

(J o

-1 -2 -3 -4

0.05 0.1 1 10

T: Room Temperature

-5

-55

T (°C)

100 F (kHz)

TANGENT OF LOSS ANGLE (TAN8₀) FOR POLYESTER DIELECTRIC

Dielectric loss factor of polyester is a function of temperature and frequency (see the curves).

frequency


Loss factor in Polyester Dielectric		-1kHz
		- - -10kHz
		--------------100kHz
		1MHz
	"--\ ^%* *- .
	— *^^^m^-~ -*


		300
		250
	Ó	200
	o to	150
	O)
	O)	100
		50
		0

-40

2040

Hot spot temperature (°C)

100

HOT SPOT CALCULATION

Calculate the maximum operating (hot spot) temperature in the following manner:

The loss factor of the capacitor is made up of the sum of two components. The first represents electrical losses (see the curve polyester losses) and the second represents Joule effect in the connections and foil. For detail formulas refer to industrial products.