Datasheet

11© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard F3120_R41-T_Y2_300 • 5/26/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Metallized Polypropylene Film EMI Suppression Capacitors
R41T, THB, Class Y2, 300 VAC, 125°C (Automotive Grade)
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 183°C 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.
Manual Soldering Recommendations
The 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