Datasheet

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Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Metallized Polypropylene Film EMI Suppression Capacitors for Harsh Environmental Conditions
R52 (Miniature), Class X2, 310 VAC, 110°C (Automotive Grade)
Soldering Process
The implementation of the RoHS directive has resulted in the selection of SnAuCu (SAC) alloys or SnCu alloys as primary
soldermaterial.Thishasincreasedtheliquidustemperaturefrom183°CforSnPbeutecticalloysto217–221°Cforthenew
alloys.Asaresult,theheatstresstothecomponents,eveninwavesoldering,hasincreasedconsiderablyduetohigherpre-
heat and wave temperatures. Polypropylene capacitors are especially sensitive to heat (the melting point of polypropylene
is160–170°C).Wavesolderingcanbedestructive,especiallyformechanicallysmallpolypropylenecapacitors(withlead
spacingof5–15mm).Greatcaremustbetakenduringsoldering.TherecommendedsolderprolesfromKEMETshouldbe
used.ConsultKEMETwithanyquestions.Ingeneral,thewavesolderingcurvefromIECPublication61760-1Edition2serves
as a solid guideline for successful soldering. See Figure 1.
Reowsolderingisnotrecommendedforthrough-holelmcapacitors.Exposingcapacitorstoasolderingproleinexcess
oftheabove-recommendedlimitsmayresulttodegradationoforpermanentdamagetothecapacitors.
Do not place the polypropylene capacitor through an adhesive curing oven to cure resin for surface mount components.
Insertthrough-holepartsaftercuringsurfacemountparts.ConsultKEMETtodiscusstheactualtemperatureprolein
theoven,ifthrough-holecomponentsmustpassthroughtheadhesivecuringprocess.Amaximumtwosolderingcycles
isrecommended.Allowtimeforthecapacitorsurfacetemperaturetoreturntonormaltemperaturebeforeperformingthe
second soldering cycle.
Manual Soldering Recommendations
Following is the recommendation for manual
soldering with a soldering iron.
The soldering iron tip temperature should
besetat350°C(+10°Cmaximum),withthe
solderingdurationnottoexceedmorethan
3 seconds.
Recommended Soldering Temperature
0
50
100
150
200
250
300
350
400
0 1 2 3 4 5 6 7
8
Soldering Time (seconds)
Soldering Iron Bit Temperature (°C)
Wave Soldering Recommendations
0
50
100
150
200
250
300
0 40 80 120 160 200 240
Temperature (°C)
Time (seconds)
Cooling
2+3 seconds max
260°C
First Wave
Second Wave
∆ T <
150°C
ca. 2°C/second
ca. 3.5°C/second
typical
Preheating
T
preheat
Typical