Power and AC Film Capacitors
Printed Circuit Board Mount Power Film Capacitors – C4G Series, Axial Round, 250 – 850 VDC/160 – 450 VAC
Soldering Process
The implementation of the RoHS Directive has required the
selection SnAgCu (SAC) alloys or SnCu alloys as primary solder.
This has increased the liquidus temperature from that of 183ºC
for SnPb eutectic alloy to 217ºC – 221ºC for the new alloys. As
a result, the heat stress to components, even in wave soldering,
has increased considerably due to higher pre-heat and wave
temperatures. Polypropylene capacitors are especially sensitive
to heat (melting point of polypropylene is 160ºC – 170ºC). Wave
soldering can be destructive especially for mechanically small
polypropylene capacitors (lead spacings 5 – 10 mm) and great
care must be taken during soldering. The solder profiles from
KEMET are highly recommended. You may also refer to the wave
soldering curve from IEC Publication 61760 – 1 Edition 2. Please
consult KEMET with any questions.
Construction
Detailed Cross Section
Metal Contact
Layer
Single-sided Metallized
Polypropylene Film
(Second Layer)
Margin
Lead
Polyester Tape
Wrapping
Lead
Single-sided Metallized
Polypropylene Film
(First Layer)
Margin
Margin
Polyester Tape
Wrapping
Thermosetting
Resin End-Fill
Thermosetting
Resin End-Fill
Metal Contact
Layer
Winding Scheme
Single-sided
Metallized
Polypropylene
Film
1 Section
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com
F3040_C4G_AXIAL • 4/20/2016
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