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 When
placing an order or making an inquiry, please
specify the
followings
①
Working voltage : DC, AC
②
Capacitance value
③
Capacitance tolerance
④
Finished product : Color TV, Stereo, Swiching
power supply, lighting fixture, etc.
⑤
Application or circuit diagram : noise suppression,
resonance,etc.
⑥
Operating condition : pulse, frequency,
waveform, current, etc.
⑦
Operating temperature
⑧
Dimensions : L x H x T x P
⑨
Shape : enclosure (dip, case, straight,
crimped)
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Product
code system
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10
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15
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■
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■
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■
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■
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■
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■
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■
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■
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■
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■
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*
Digit 1 to 4 : product code
 product code is 3 digit to 4 digit
example : MPP is 3 digit, MPPS is 4 digit
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Digit 5 to 6 : DC or AC rated voltage
DC rated voltage on mark
example : MPP250V104K no mark means DC rated
voltage.
Only AC rated voltage marked
example : CMPP AC 275V 104K
*
Digit 14 : tolerance : ±5%(J), ±10%(K), ±20%(M)
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Code Letter
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B
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C
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D
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F
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G
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H
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J
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K
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M
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Tolerance
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±0.1
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±0.25
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±0.5
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±1
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±2
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±3
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±5
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±10
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±20
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*
Digit 15 : lead wire crimped style
digit 5 to 6, Nomark means "DC"
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Date
code
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Year
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Code Letter
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2005
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5
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2006
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6
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2007
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7
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2008
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8
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2009
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9
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2010
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0
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Year
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Code Letter
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1999
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9
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2000
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0
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2001
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1
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2002
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2
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2003
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3
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2004
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4
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1st week to
52nd week
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Code Letter
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1st : Mon to
Sun.
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01
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2nd : Mon to
Sun.
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02
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3rd : Mon to Sun.
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52nd : Mon to Sun.
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03
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52
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Crimped
Style for Lead Wire
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Derating
of rated voltage
1.
Rated upper limit temperature, usable upper limit
temperature, and derating ratio
of usable upper limit temperature
The Polyester(PET) capacitor is relatively high
in dissipation factor(tan δ), and when used at
high
frequency, then the self heating temperature is
increased. Use within the self heating
temperature is if 10℃ or less, and the capacitor
surface temperature not exceeding the rated
upper limit
temperature.
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Dielectric
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Type |
Rated Upper Limit
Temperature
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Usable Upper Limit
Temperature
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Usable Upper Limit
Voltage
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Polyester |
MPE |
85℃
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105℃
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Rated Volt x 75%
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Polypropylene
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MPP,NPP,NPPS |
70℃
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85℃
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Rated Volt x 75%
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PPS
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CMPP |
85℃
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105℃
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Rated Volt x 75%
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| MPPS |
125℃
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125℃
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Rated Volt
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2.
Derating of rated voltage to capacitance value
Generally in film capacitors as the capacitance
value is increased the withstand voltage
performance is decreased. in the case of capacitorance
range exceeding 0.1㎌ of polypropylene
capacitors with NPP type and NPPS type, use within
the following voltage.
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Cap.value(㎌)
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Rated volt
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50VDC
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100VDC
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200VDC
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400VDC
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630VDC
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0.11-0.12
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49V
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98V
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195V
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390V
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615V
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0.13-0.15
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47V
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95V
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190V
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380V
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600V
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0.16-0.18
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46V
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93V
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185V
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370V
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585V
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.020-0.22
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45V
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90V
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180V
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360V
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570V
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0.24-0.27
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44V
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88V
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175V
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350V
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0.30-0.33
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42V
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85V
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170V
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340V
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0.36-0.39
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41V
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83V
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165V
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320V
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0.43-0.47
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40V
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80V
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160V
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300V
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3.
Derating of rated voltage when using at high frequency
When using at high frequency, there is a risk
of thermal runaway(smoke, fire) due to self heat
generation in the capacitor. Derate the rated
voltage according to the example below. Therefore,
the rated voltage at 150Vrms at commercial frequency.
(It is necessary to derate the rated voltage
until the self heating temperature rising of the
capacitor is below the specified value.)
Calculation
of rms in Varisious waveforms
In
each waveform, calculate the root-mean-square(rms)
value in the formula.
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NOTES
(1) Use the peak value(Vo-p) of the
pulse voltage applied to both ends
of the capacitor within the DC rated
voltage.
(2) When using at high frequency it
may lead to breakdown due to withstand
voltage deterikoration by self heat
generation. Therefore, measure the
self heating temperature rising value
of the capacitor and make sure it
must be used within the specified
limit.
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Please use the capacitor within the voltage limit
calculated by the rated voltage multiplied
by
the
coefficient listed as bellow.
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MPE TYPE
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MPP TYPE
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Frequency
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Derating Rate to
50/60Hz AC Rated Voltage
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Frequency
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Derating Rate to
50/60Hz AC Rated Voltage
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50/60 Hz
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100(%)
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50/60 Hz
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100(%)
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1K
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54
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1K
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76
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5K
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39
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5K
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55
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10K
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34
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10K
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49
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20K
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30
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20K
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41
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30K
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27
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30K
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38
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40K
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26
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40K
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36
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50K
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25
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50K
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35
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60K
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24
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60K
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33
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70K
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23
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70K
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32
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80K
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22
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80K
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31
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90K
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21
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90K
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30
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100K
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21
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100K
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30
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"AC"
Voltage value must be within the specified value
as below.
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Rated Voltage
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MPE
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MPP
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100VDC
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50VAC
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250VDC
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125VAC
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125VAC
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400VDC
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200VAC
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160VAC
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630VDC
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250VAC
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200VAC
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800VDC
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250VAC
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Maximum
Operating AC Voltage (at 50, 60Hz) |
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Permissible
Current
Film Capacitors are low in internal impedance,
and hence a very large charging or discharging
current may flow depending on the circuit.
When a charging or discharging current exceeding
the permissible range flows, temperature
rising occurs due to self heat generation
thus this can cause deterioration of withstand
voltage and result in a short circuit, possible
leading to smokeor fire. In particular in
an application where the rms current is
large or a large pulse current flows measure
the self heating temperature rise and make
sure it is within the permissible self heating
temperature rising limit.
The permissible current must be considered
by dividing into pulse current (peak current)
and continuous current (rms current) depending
on the breakdown mode and when wsing therefore
make sure the both currents are within the
permissible values.
1. Permissible
current to operating frequency
The film capacitor varies in the frequency
characteristic of the dissipation factor
and hence the permissible rms current for
operating frequency particular when operating
at high frequency the dissipation factor
(tan δ) increases and when using over the
permissible current it may trigger thermal
runaway possibly leading to smoke or fire.
Shown below are typical examples of permissible
current by frequency(rms value) of the MPE
type using polyester film and NPP type using
polypropylene film.
2. Permissible
current to pulse current
The pluse permissible current is generally
obtained by the product of dV/dt(V/㎲) value
and capacitance (㎌)
* the dV/dt(V/㎲) value of a film capacitor
is defermined by the element structure <how
to determine pulse permissible current>
* When voltage (V) is applied to capacitor
C (Farad), the electric charge Q (Coulomb)
is expressed in formular ①.
Q = C.V ........ ①
* The charging current (A) flow in the capacitor
C (Farad), the electric charge Q (Coulomb)
is expressed in formula ②.
I = dQ/dt ........ ②
* Differentiating both sides of formula
① by time t and putting into formula ② yields
formula ③.
dQ/dt = C.dv/dt
I = C.dv/dt ........ ③
Therefore the pulse current is determined
as the metallized type in particular the
internal evaporated electrode and external
takeout electrode are connected by metallized
contact (metal spraying) and hence due caution
is needed because the upper limit dV/dt
value is low.
* The dV/dt values corresponding to rated
voltaged and capacitance value of representative
types are shown. When used in a high current
pulse circuit check the pulse permissible
current (Ao-p)
* Please consult us, if pulses are applied
more than 10,000 times. product of the capacitance
value C(㎌) and voltage change dV/dt per
㎲
(Example) in the case of MPP 400V 224KF
permissible
dV/dt value(V/㎲)
Rated Voltage : 400VDC
Capacitance : 0.22㎌
Permissible dV/dt value : 37
Pulse permissible current : 0.22(㎌) X 37 = 8
Ao-p
(however, number of repetitions is 10,000
times or less) that is momentary pulse current
can be used up to 8 Ao-p.
Make sure the rms current is within the
permissible value.
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FILM
CAPACITORS
| Metallized Polyester
Film Capacitor |
Within 10℃ |
| Metallized Polypropylene
Cap. |
Within 5℃ |
| PPS Film |
Within 15℃ |
| Polypropylene
Film Cap. & Series type |
Within 7℃ |
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Operating
temperature own temperatur rise
When the film capacitor is used in an AC circuit,
especially in high frequency application the
capacitors self heating generation may be occured.
Check the self heating temperature rising value
in actual conditions of use and within the limit
specified in the table above.
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