Matters to Be Observed When Using This Product

■ The capacitor has an upper limit service temperature (surface temperature) determined in accordance with the type of

a dielectric material making up the capacitor. When using the capacitor at a temperature higher than the rated temperature,

confirm the following classification table because some types capacitors require voltage reduction. Even when the

capacitor can be used at a temperature higher than the rated temperature, make sure that voltage reduction is carried

out to keep the surface temperature equal to or lower than an upper limit service temperature specified in the following

table.

A capacitor used at a high frequency shows a self-temperature rise. A voltage reduction rate shown in the following

table, therefore, cannot be applied in this case.

The AC rated voltage type capacitor does not need a temperature-dependent voltage reduction.

<Rated temperatures, category upper limit temperatures, and voltage reduction rates classified by type in the

case of DC working voltage>

※Rated temperature: upper limit temperature that can be used continuously without involving voltage reduction

(which includes the self-temperature rise value)

※Category upper limit temperature: upper limit temperature that can be used continuously when voltage reduction

is implemented (which includes the self-temperature rise value)

<Voltage reduction example>

When the rated temperature is 85 ℃ and the category upper limit temperature is 105 ℃, voltage reduction is

carried out at a reduction rate of 1.25 %/ ℃ in a temperature range of 85 ℃ or higher.

Polypropylene

(PP)

ECWFJ

Rating 800 V.DC

85

℃

110

℃

1.0 %/

℃

85 ℃

23-Apr-25

Polyester

(PET)

ECQE(F)

85 ℃

105 ℃

1.25%/ ℃

ECQE(B)

ECQE(T)

Voltage reduction is

unnecessary.

ECWF(L)

ECWH(A)

105 ℃

ECWH(C)

ECWF(A)

Rating 450 V DC

85 ℃

ECWF(A)

Rating 250 V DC

105 ℃

1.25%/ ℃

ECWF(A)

Rating 630 V DC

ECWH(V)

ECWFE

Rating 450 V DC

105 ℃

105 ℃

1.0%/ ℃

ECWFE

Rating 630 V DC

ECWFG

Rating 630 V DC

85 ℃

110 ℃

1.0%/ ℃

ECWFD

Rating 450 V DC

85 ℃

110 ℃

0.62%/ ℃

ECWFD

Rating 630 V DC

85 ℃

85 ℃

Voltage reduction is unnecessary.

ECWU(C)

85 ℃

125 ℃

1.25%/ ℃

Polyphenylene sulfide

(PPS)

ECHU(X)

Rating 16 V DC

125 ℃

Voltage reduction is unnecessary.

Voltage reduction is unnecessary.

ECHU(X)

Rating 50 V DC

(0.0001 μF to 0.10 μF)

125 ℃

Polyethylene

naphthalate

(PEN)

ECWU(X)

105 ℃

105 ℃

ECWU(V16)

Voltage reduction is unnecessary.

Rating 50 V DC

105 ℃

125 ℃

1.25%/ ℃

(0.12 μF to 0.22 μF)

ECHU(C)

105 ℃

105 ℃

Voltage reduction is unnecessary.

ECHU(X)

Acrylic resin

ECPU(A)

85 ℃

85 ℃

Dielectric material

Type

Rated

temperat

ure

Category upper limit

temperature

(maximum service

temperature)

Rated voltage in a temperature

range equal to or higher than the

rated temperature

(voltage reduction rate)

100

80

50

90

60

70

-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100

Temperature of the capacitor wall

（℃）