BFC246743223 查看數據表（PDF） - Vishay Semiconductors
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BFC246743223 Datasheet PDF : 22 Pages
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www.vishay.com
MKT467, MKT468
Vishay BCcomponents
3. The voltage pulse 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
2 x
d--d--U-t--
2
x
dt
URDC
x
d--d--U-t--
rated
0
T is the pulse duration.
The rated voltage pulse slope is valid for ambient temperatures up to 85 °C. For higher temperatures a derating factor of
3 % per K shall be applied.
4. The maximum component surface temperature rise must be lower than the limits (see graph “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
ALLOWED VOLTAGES
Maximum continuous RMS voltage
Maximum temperature RMS-overvoltage (< 24 h)
Maximum peak voltage (VO-P) (< 2 s)
Tamb 85 °C
URAC
1.25 x URAC
1.6 x URAC
85 °C < Tamb 105 °C
0.8 x URAC
URAC
1.3 x URAC
Example
C = 330 nF - 100 V used for the voltage signal shown in next drawing.
UP-P = 80 V; UP = 70 V; T1 = 0.5 ms; T2 = 1 ms
The ambient temperature is 35 °C
Checking conditions:
1. The peak voltage UP = 70 V is lower than 100 VDC
2. The peak-to-peak voltage 80 V is lower than 22 x 63 VAC = 178 UP-P
3. The voltage pulse slope (dU/dt) = 80 V/500 μs = 0.16 V/μs
This is lower than 20 V/μs (see specific reference data for each version)
4. The dissipated power is 60 mW as calculated with fourier terms
The temperature rise for Wmax. = 8.5 mm and pitch = 15 mm will be 60 mW/11 mW/°C = 5.5 °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
Voltage
UP
T1
T2
UP-P
Time
Revision: 27-Mar-18
17
Document Number: 28105
For technical questions, contact: dc-film@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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