Datasheet

22© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard F3121_R75H • 6/16/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Film Capacitors – Polypropylene Pulse/High Frequency Capacitors
R75H, Single Metallized Polypropylene Film, Radial, DC, and Pulse Applications (Automotive Grade)
Soldering Process
The implementation of the RoHS directive has resulted in the selection of SnAgCu (SAC) alloys or SnCu alloys as a 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 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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 recommended 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