150

SECTION 1:

ELECTRICAL CHARACTERISTICS AND EXPLANATION OF TERMS

1.1 CAPACITANCE

This is the nominal rated capacitance. For tantalum capaci-

tors it is measured as the capacitance of the equivalent

series circuit at 20°C in a measuring bridge supplied by a

120 Hz source free of harmonics with 2.2V DC bias max.

1.1.2 Temperature dependence on the capacitance

The capacitance of a tantalum capacitor varies with temper-

ature. This variation itself is dependent to a small extent on

the rated voltage and capacitor size. See graph below for

typical capacitance changes with temperature.

1.1.3 Capacitance tolerance

This is the permissible variation of the actual value of the

capacitance from the rated value.

1.1.4 Frequency dependence of the capacitance

The effective capacitance decreases as frequency increases.

Beyond 100 kHz the capacitance continues to drop until res-

onance is reached (typically between 0.5-5 MHz depending

on the rating). Beyond this the device becomes inductive.

Typical Capacitance vs. Temperature

15

10

5

0

-5

-10

-15

Temperature (

°C)

-55

-25

0

25

50

75

100

125

1.0 F 35V

1.4

1.2

1.0

0.8

0.6

0.4

100Hz

1kHz

10kHz

100kHz

Frequency

1.2 VOLTAGE

This is the rated DC voltage for continuous operation up to

+85°C.

This is the maximum voltage that may be applied continu-

ously to a capacitor. It is equal to the rated voltage up to

+85°C, beyond which it is subject to a linear derating, to 2/3

This is the highest voltage that may be applied to a capaci-

tor for short periods of time. The surge voltage may be

applied up to 10 times in an hour for periods of up to

30 seconds at a time. The surge voltage must not be used

as a parameter in the design of circuits in which, in the

normal course of operation, the capacitor is periodically

charged and discharged.

100

90

80

70

60

50

75

85

95

105

115

125

Temperature

°C

TAP/TEP Technical Summary and

Application Guidelines

Typical Curve Capacitance vs. Frequency

Category Voltage vs. Temperature