Datasheet
7© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard F3014_PME271E_X1_300 • 3/15/2019
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Film Capacitors – AC Line EMI Suppression and RC Networks
PME271E Series Metallized Impregnated Paper, Class X1, 300 VAC
Soldering Process cont'd
Wave Soldering Recommendations cont'd
1. The table indicates the maximum setup temperature for the soldering process.
Dielectric
lm
material
Maximum Preheat Temperature
Maximum Peak Soldering
Temperature
Capacitor
Pitch≤10mm
Capacitor
Pitch = 15 mm
Capacitor
Pitch > 15 mm
Capacitor
Pitch≤15mm
Capacitor
Pitch > 15 mm
Polyester 130°C 130°C 130°C 270°C 270°C
Polypropylene 100°C 110°C 130°C 260°C 270°C
Paper 130°C 130°C 140°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.
Dielectric Film Material
Maximum Temperature
Measured Inside the Element
Polyester 160°C
Polypropylene 110°C
Paper 160°C
Polyphenylene Sulphide
160°C
Temperature monitored inside the capacitor.
Selective Soldering Recommendations
Selectivedipsolderingisavariationofreowsoldering.Inthismethod,theprintedcircuitboardwiththrough-hole
componentstobesolderedispreheatedandtransportedoverthesolderbath,asinnormalowsoldering,without
touching the solder. When the board is over the bath, it is stopped. 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.
Thetemperatureproleforselectivesolderingissimilartothedoublewaveowsolderingoutlinedinthisdocument.
However, instead of two baths, there is only one with a time from 3 to 10 seconds. In selective soldering, the risk of
overheatingisgreaterthanindoublewaveowsoldering.Greatcaremustbetakensothatthepartsdonotoverheat.