Metallized Polypropylene Film EMI Suppression Capacitors
R47 Series, Class X1, 440 VAC, 110ºC (Automotive Grade)
Soldering Process cont'd
Wave Soldering Recommendations cont'd
1. The table indicates the maximum set-up temperature of the soldering process
Figure 1
Maximum
Maximum Preheat
Peak Soldering
Temperature
Temperature
Dielectric
Film Material
Capacitor Capacitor Capacitor Capacitor Capacitor
Pitch
Pitch
Pitch
Pitch
Pitch
≤ꢀ10ꢀmm = 15 mm > 15 mm ≤ꢀ15ꢀmm > 15 mm
Polyester
Polypropylene
Paper
130°C
100°C
130°C
130°C
110°C
130°C
130°C
130°C
140°C
270°C
260°C
270°C
270°C
270°C
270°C
Polyphenylene
Sulphide
150°C
150°C
160°C
270°C
270°C
2. The maximum temperature measured inside the capacitor:
Set the temperature so that inside the element the maximum temperature is below the limit:
Maximum temperature
Dielectric Film Material
measured inside the element
Polyester
Polypropylene
Paper
160°C
110°C
160°C
160°C
Polyphenylene
sulphide
Temperature monitored inside the capacitor.
Selective Soldering Recommendations
Selectiveꢀdipꢀsolderingꢀisꢀaꢀvariationꢀofꢀreflowꢀsoldering.ꢀInꢀthisꢀmethod,ꢀtheꢀprintedꢀcircuitꢀboardꢀwithꢀthrough-holeꢀcomponentsꢀtoꢀbeꢀ
solderedꢀisꢀpreheatedꢀandꢀtransportedꢀoverꢀtheꢀsolderꢀbathꢀasꢀinꢀnormalꢀflowꢀsolderingꢀwithoutꢀtouchingꢀtheꢀsolder.ꢀWhenꢀtheꢀboardꢀisꢀ
over the bath, it is stopped and pre-designed solder pots are lifted from the bath with molten solder only at the places of the selected
components, and pressed against the lower surface of the board to solder the components.
Theꢀtemperatureꢀprofileꢀforꢀselectiveꢀsolderingꢀisꢀsimilarꢀtoꢀtheꢀdoubleꢀwaveꢀflowꢀsolderingꢀoutlinedꢀinꢀthisꢀdocument,ꢀhowever, instead
of two baths, there is only one bath with a time from 3 to 10 seconds. In selective soldering, the risk of overheating is greater than
inꢀdoubleꢀwaveꢀflowꢀsoldering,ꢀandꢀgreatꢀcareꢀmustꢀbeꢀtakenꢀsoꢀthatꢀtheꢀpartsꢀareꢀnotꢀoverheated.
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com
F3097_R47_X1_440 • 6/9/2016
9
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