Datasheet

6© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard F3011_PME271M_X2_275 • 1/14/2019
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Film Capacitors – AC Line EMI Suppression and RC Networks
PME271M, Metallized Impregnated Paper, Class X2, 275 VAC
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)
Soldering Process
TheimplementationoftheRoHSdirectivehasresultedintheselectionofSnAgCu(SAC)alloysorSnCualloysasprimarysolder.
This has increased the liquidus temperature from that of 183ºC for SnPb eutectic alloy to 217 – 221°C for the 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 mm to
15mm),andgreatcarehastobetakenduringsoldering.TherecommendedsolderprolesfromKEMETshouldbeused.Please
consult 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. Please 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
above the recommended limits may result to 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thecuringofsurfacemountparts.Consult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.
Please allow time for the capacitor surface temperature to return to a normal temperature before the second soldering cycle.
Wave Soldering Recommendations
0
50
100
150
200
250
300
0
40
80
120
160
200
240
Temperature (°C)
Time (s)
ca 2°C/second
ca 3.5°C/second typical
ca 5°C/second
Cooling
2 +3 seconds maximum
115 °C max
T
preheat
∆T < 150°C
100 °C
Preheating
Typical
First wave
Second wave
260°C