Datasheet

17© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard F3114_C4AQ • 7/29/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Power and AC Film Capacitors – Printed Circuit Board Mount Power Film Capacitors
C4AQ, Radial, 2 or 4 Leads, 500 - 1,500 VDC, for DC Link (Automotive Grade)
Soldering Process
The implementation of the RoHS directive has resulted in the selection of SnAuCu (SAC) alloys, or SnCu alloys, as the primary
soldermaterial.Thishasincreasedtheliquidustemperaturefrom183°CforaSnPbeutecticalloyto217–221°Cfornewalloys.
Asaresult,theheatstresstothecomponents,eveninwavesoldering,hasincreasedconsiderablyduetohigherpre-heatand
wavetemperatures.Polypropylenecapacitorsareespeciallysensitivetoheat(themeltingpointofpolypropyleneis160–170°C).
Wavesolderingcanbedestructive,especiallyformechanicallysmallpolypropylenecapacitors(withleadspacingof5–15mm),
andgreatcaremustbetakenduringsoldering.TherecommendedsolderprolesfromKEMETshouldbeused.ContactKEMET
withanyquestions.Ingeneral,thewavesolderingcurvefromIECPublication61760–1Edition2servesasasolidguidelinefor
successful soldering. See Figure 1.
Reowsolderingisnotrecommendedforthrough-holelmcapacitors.Exposingcapacitorstoasolderingproleinexcessofthe
recommended limits may result in degradation or permanent damage to the capacitors.
Do not place the polypropylene capacitor through an adhesive curing oven to cure resin for surface mount components. Insert
through-holepartsaftercuringthesurfacemountparts.ContactKEMETtodiscusstheactualtemperatureproleintheoven,if
through-hole components must pass through the adhesive curing process. A maximum two soldering cycles is recommended.
Allowtimeforthecapacitorsurfacetemperaturetoreturntonormalbeforethesecondsolderingcycle.
Manual Soldering Recommendations
Following is the recommendation for manual
soldering with a soldering iron.
The soldering iron tip temperature should
besetat350°C(+10°Cmaximum)withthe
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 (seconds)
Soldering Iron Bit Temperature (°C)
Wave Soldering Recommendations
0
50
100
150
200
250
300
0 40 80 120 160 200 240
Temperature (°C)
Time (seconds)
Cooling
2+3 seconds max
260°C
First Wave
Second Wave
∆ T <
150°C
ca. 2°C/second
ca. 3.5°C/second
typical
Preheating
T
preheat
Typical