PCMP384D17 datasheet(25/26 Pages) WPI

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Pilkor components

Metallized Polypropylene

PCMP 384

film capacitors

209

APPLICATION NOTE AND LIMITING CONDITIONS

These capacitors are not suitable for mains application as across-the-line capacitors without additional protection.

To select the capacitor for a certain application, the following conditions must be checked :

1. The peak voltage (Vp) shall not be greater than the rated DC voltage (VRdc).

2. The peak-to-peak voltage (Vp-p) shall not be greater than the maximum Vp-p to avoid the ionisation inception level.

3. The voltage pulse slope (dV/dt) shall not exceed the rated voltage pulse slope in an RC-circuit at rated voltage and

without ringing. If the pulse voltage is lower than the rated DC voltage, the rated voltage pulse slope may be multiplied

by VRdc and divided by the applied voltage.

For all other pulses following equation must be fulfilled :

2 × ⌡

⌠









dt < U

Rdc ×









rated

T is the pulse duration.

4. The maximum component surface temperature rise must be lower than the limits.

Voltage conditions for aboves.

ALLOWED VOLTAGES

Tamb < 85

oC < T

amb < 105

Maximum continuous RMS voltage

VRac

0.75 x VRac

Maximum temporary RMS over voltage

(<24 hours)

1.25 x VRac

1.0 x VRac

Maximum peak voltage (Vo-p) (<2s)

1.6 x VRdc

1.1 x VRdc

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