© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com

F3092_F862_X2_310 • 9/23/2016

8

Film Capacitors – AC Line EMI Suppression and RC Networks

F862 Series Metallized Polypropylene Film for Harsh Environmental Conditions, Class X2, 310 VAC (Automotive Grade)

Manual Soldering Recommendations

Following is the recommendation for manual

soldering with a soldering iron.

The soldering iron tip temperature should

besetat350°C(+10°Cmaximum)withthe

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 (sec)

Soldering Process

The implementation of the RoHS directive has resulted in the selection of SnAgCu (SAC) alloys or SnCu alloys as primary solder.

Thishasincreasedtheliquidustemperaturefromthatof183ºCforSnPbeutecticalloyto217–221ºCforthenewalloys.Asa

result,theheatstresstothecomponents,eveninwavesoldering,hasincreasedconsiderablyduetohigherpre-heatandwave

temperatures.Polypropylenecapacitorsareespeciallysensitivetoheat(themeltingpointofpolypropyleneis160–170ºC).Wave

solderingcanbedestructive,especiallyformechanicallysmallpolypropylenecapacitors(withleadspacingof5mmto15mm),

andgreatcarehastobetakenduringsoldering.TherecommendedsolderprofilesfromKEMETshouldbeused.Pleaseconsult

KEMETwithanyquestions.Ingeneral,thewavesolderingcurvefromIECPublication61760-1Edition2servesasasolidguideline

for successful soldering. Please see Figure 1.

Reflowsolderingisnotrecommendedforthrough-holefilmcapacitors.Exposingcapacitorstoasolderingprofileinexcessofthe

abovetherecommendedlimitsmayresulttodegradationorpermanentdamagetothecapacitors.

Do not place the polypropylene capacitor through an adhesive curing oven to cure resin for surface mount components. Insert

through-holepartsafterthecuringofsurfacemountparts.ConsultKEMETtodiscusstheactualtemperatureprofileintheoven,

if through-hole components must pass through the adhesive curing process. A maximum two soldering cycles is recommended.

Pleaseallowtimeforthecapacitorsurfacetemperaturetoreturntoanormaltemperaturebeforethesecondsolderingcycle.

Wave Soldering Recommendations

0

50

100

150

200

250

300

0

40

80

120

160

200

240

Time (s)

ca 2°C/s

ca 3.5°C/s typical

ca 5°C/s

Cooling

2+3s max

115°C max

ΔT <150°C

100°C

Preheating

Typical

First wave

Second wave

260°C