Datasheet

20© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard F3072_SMR • 3/6/2019
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Film Capacitors – Metallized Polyphenylene Sulde, Stable +150°C High Temperature Capacitor
SMR, 5.0 – 27.5 mm Lead Spacing, 50 – 400 VDC
Soldering Process cont'd
Wave Soldering Recommendations cont'd
1. The table indicates the maximum set-up temperature of the soldering process
Figure 1
Dielectric
Film Material
Maximum Preheat
Temperature
Maximum
Peak Soldering
Temperature
Capacitor
pitch
≤10mm
Capacitor
pitch
= 15 mm
Capacitor
pitch
> 15 mm
Capacitor
pitch
≤15mm
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
Selectivedipsolderingisavariationofreowsoldering.Inthismethod,theprintedcircuitboardwiththrough-hole
componentstobesolderedispreheatedandtransportedoverthesolderbathasinnormalowsolderingwithouttouching
thesolder.Whentheboardis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.
Thetemperatureproleforselectivesolderingissimilartothedoublewaveowsolderingoutlinedinthisdocument;
however, instead of two baths, there is only one bath with a time of 3 to 10 seconds. In selective soldering, the risk of
overheatingisgreaterthanindoublewaveowsoldering,andgreatcaremustbetakensothatthepartsarenotoverheated.