MKT1820727165MW 查看數據表（PDF） - Vishay Semiconductors

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MKT1820727165MW

DC Film Capacitors MKT Radial Potted Type

Vishay Semiconductors 

www.vishay.com

MKT1820

Vishay Roederstein

APPLICATION NOTE AND LIMITING CONDITIONS

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 the maximum (UP-P) to avoid the ionization 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

 2 x





d--d--U-t--

2

x

dt



UNDC

x





d--d--U-t--

rated

0

T is the pulse duration.

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).

7. For capacitors connected in parallel, normally the proof voltage and possibly the rated voltage must be reduced. For

information depending of the capacitance value and the number of parallel connections contact dc-film@vishay.com.

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 URDC

85 °C < Tamb  100 °C

0.8 x URAC

URAC

1.3 x URDC

100 °C < Tamb  125 °C

0.5 x URAC

0.6 x URAC

0.5 x URDC

Revision: 02-Feb-18

13

Document Number: 26011

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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