MKP1848C771012KK4 Ver la hoja de datos (PDF) - Vishay Semiconductors
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MKP1848C771012KK4 Datasheet PDF : 20 Pages
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www.vishay.com
MKP1848C DC-Link
Vishay Roederstein
POWER DISSIPATION AND MAXIMUM COMPONENT TEMPERATURE RISE
The power dissipation must be limited in order not to exceed the maximum allowed component temperature rise as a function
of the free air ambient temperature.
The component temperature rise (T) can be measured or calculated by T = P/G:
• T = Tcase - Tambient = case temperature rise (°C) with a maximum of 15 °C at rated temperature.
• P = IRMS2 x ESR = power dissipation of the component (mW)
• G = heat conductivity of the component (mW/°C)
MEASURING THE COMPONENT TEMPERATURE
Thermocouple
The case temperature is measured in unloaded condition (Tamb) and loaded condition (TC).
To avoid external thermal radiation or convection, the capacitor must be tested in a closed area, free from air circulation.
APPLICATION NOTES AND LIMITING CONDITIONS
These capacitors are not suitable for mains applications as across-the-line capacitors without additional protection.
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 continuous peak voltage (Up+) shall not exceed the DC voltage rating (UNDC)
2. The peak-to-peak ripple voltage (Upp) shall not be greater than 0.2 x UNDC
Non reversing recurrent waveform
Up+ UNDC
Up-
t
3. 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.
4. The voltage peak slope (dU/dt) shall not exceed the pulse slope at the DC voltage rating.
If the pulse voltage is lower than the rated DC voltage, the rated voltage pulse slope may be multiplied by UNDC 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
MAXIMUM REPETITIVE PEAK VOLTAGES
REPETITIVE SURGE VOLTAGE
1.1 x UNDC
1.15 x UNDC
1.2 x UNDC
1.3 x UNDC
1.5 x UNDC
MAXIMUM DURATION PER DAY
30 % of on load duration
30 min
5 min
1 min
110 ms
Note
• The capacitor unit may be subjected to the surge above without any significant reduction of lifetime expectancy.
Revision: 31-Oct-2018
15
Document Number: 26015
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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