Matters to Be Observed When Using This Product

■ The RMS current (effective current) varies depending on the capacitance. The following graphs show allowable RMS

currents (effective currents) of typical capacitor types by frequency/capacitance. When actually using these capacitors,

measure their voltage/current waveforms and ambient temperatures/self-temperature rise values and give us these

measurements with your inquires.

Type: ECQE(F) (Polyester)

Type: ECWF(A) (Polypropylene)

Rating: 250 V DC -> 150 Vrms (sine wave) 60 Hz

Rating: 250 V DC -> 125 Vrms (sine wave) 60 Hz

Temperature: -40 ℃ to 85 ℃ (capacitor wall temperature)

Temperature: -40 ℃ to 85 ℃ (capacitor wall temperature)

■ When the capacitor is used in a switching circuit or snubber circuit, an instantaneous flow of large pulse current

causes the capacitor to locally generate heat. As a result, the film deposit scatters off, which may decreases the

capacitance of the capacitor or put the capacitor in an open state. This local heating may trigger a smoke

generation or ignition incident.

■ A pulse current value (10000 times) can be given as the product of dV/dt (V/µs) and a capacitance (µF) that are

specified in the delivery specification sheet. dV/dt is determined by the element structure.

■ When the capacitor is used in a large-current pulse circuit, keep the pulse current value within the allowable

pulse current (Ao-p). When applying a pulse current 10000 times or more, please contact us to discuss the

matter separately.

23-Apr-25

5.0

1.0

0.5

0.0

10

100

50

4.5

4.0

3.5

3.0

2.5

2.0

1.5

10.0μF

4.7μF

2.2μF

1.0μF

0.47μF

0.22μF

0.10μF

0.047μF

0.022μF

0.010μF

100

50

Frequency (

ｋHz)

Frequency (

ｋHz)