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BFC237011184 Datasheet(PDF) 14 Page - Vishay Siliconix

Part No. BFC237011184
Description  DC Film Capacitors MKT Radial Potted Type
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Maker  VISHAY [Vishay Siliconix]
Homepage  http://www.vishay.com
Logo VISHAY - Vishay Siliconix

BFC237011184 Datasheet(HTML) 14 Page - Vishay Siliconix

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MKT 370
Vishay BCcomponents
DC Film Capacitors
MKT Radial Potted Type
For technical questions, contact: dc-film@vishay.com
Document Number: 28108
Revision: 04-Aug-09
These capacitors are not suitable for mains applications as across-the-line capacitors without additional protection, as described
hereunder. These mains applications are strictly regulated in safety standards and therefore electromagnetic interference
suppression capacitors conforming the standards must be used.
To select the capacitor for a certain application, the following conditions must be checked:
1. The peak voltage (UP) shall not be greater than the rated DC voltage (URdc)
2. The peak-to-peak voltage (UP-P) shall not be greater than 22 x URac to avoid the ionisation inception level
3. The voltage peak slope (dU/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 URdc and
divided by the applied voltage.
For all other pulses following equation must be fulfilled:
T is the pulse duration.
4. The maximum component surface temperature rise must be lower than the limits (see figure max. allowed component
temperature rise).
5. Since in circuits used at voltages over 280 V peak-to-peak the risk for an intrinsically active flammability after a capacitor
breakdown (short circuit) increases, it is recommended that the power to the component is limited to 100 times the values
mentioned in the table: “Heat conductivity”
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
C = 330 nF - 63 V used for the voltage signal shown in next drawing.
UP-P = 40 V; UP = 35 V; T1 = 100 µs; T2 = 200 µs
The ambient temperature is 35 °C
Checking conditions:
1.The peak voltage UP = 35 V is lower than 63 Vdc
2.The peak-to-peak voltage 40 V is lower than 2
√2 x 40 Vac = 113 U
3.The voltage pulse slope (dU/dt) = 40 V/100 µs = 0.4 V/µs
This is lower than 60 V/µs (see specific reference data for each version)
4.The dissipated power is 16.2 mW as calculated with fourier terms
The temperature rise for Wmax. = 3.5 mm and pitch = 5 mm will be 16.2 mW/3.0 mW/°C = 5.4 °C
This is lower than 15 °C temperature rise at 35 °C, according figure max. allowed component temperature rise
5. Not applicable
6. Not applicable
Voltage Signal
Tamb ≤ 85 °C
85 °C < Tamb ≤ 100 °C for 63 V
85 °C < Tamb ≤ 105 °C for > 63 V
Maximum continuous RMS voltage
See “Max. AC voltage as function
of temperature CBB952” per
Maximum temperature RMS-overvoltage (< 24 h)
1.25 x URac
Maximum peak voltage (VO-P) (< 2 s)
1.6 x URdc
1.3 x URdc
2 x
x dt
Rdc x

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