BFC238330224 Datasheet, PDF (22/26 Pages) Vishay Siliconix – AC and Pulse Double Metallized Polypropylene Film Capacitors MMKP Radial Potted Type

Not Recommended for New Design, Use New MMKP383
MMKP 383
Vishay BCcomponents ^{AC and Pulse Double Metallized Polypropylene}
Film Capacitors MMKP Radial Potted Type
6. When using these capacitors as across-the-line capacitor in the input filter for mains applications or as series connected with
an impedance to the mains the applicant must guarantee that the following conditions are fulfilled in any case (spikes and
surge voltages from the mains included).
Voltage Conditions for 6 Above
ALLOWED VOLTAGES
Maximum continuous RMS voltage
Maximum temperature RMS-overvoltage (< 24 h)
Maximum peak voltage (V_O-P) (< 2 s)
T_amb  85 °C
U_Rac
1.25 x U_Rac
1.6 x U_Rdc
85 °C < T_amb  105 °C
U_Rac
1.25 x U_Rac
1.1 x U_Rdc
EXAMPLE
C = 4 nF - 1600 V used for the voltage signal shown in next drawing.
U_P-P = 1000 V; U_P = 900 V; T₁ = 12 µs; T₂ = 64 µs; T₃ = 4 µs
The ambient temperature is 80 °C. In case of failure, the oscillation is blocked.
Checking conditions:
1. The peak voltage U_P = 900 V is lower than 1600 Vdc
2. The peak-to-peak voltage 1000 V is lower than 22 x 550 Vac = 1600 U_P-P
3. The voltage pulse slope (dU/dt) = 1000 V/4 µs = 250 V/µs
This is lower than 8000 V/µs (see specific reference data for each version)
4. The dissipated power is 35 mW as calculated with fourier terms and typical tgd.
The temperature rise for W_max. = 6.0 mm and pitch = 15 mm will be 35 mW/11 mW/°C = 3.2 °C
This is lower than 10 °C temperature rise at 80 °C, according graph.
5. Oscillation is blocked
6. Not applicable
Voltage Signal
Voltage
U_p
Up-p
T3
T1
T2
Time
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Document Number: 28124
208
Revision: 19-Mar-13
This document is subject to change without notice.
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