the Nichicon PF (M) series from the late 1980's through most of the 1990's had leakage issues, these caps played havoc with many automotive ECU's, especially high end Japanese cars. (i.e. Lexus LS400, Toyota Supra, etc.)
The problem was the use of quaternary ammonium salts.
the following capacitors from this time period had issues:
Nichicon: RZ, RT, VZ, ET, PR, PY, PF, PL, PQ, PG, MX, WX, WP, MP
Nippon Chemicon: LXF, TXF, SXE, SXG, MVK, MFK, MVF, MFF
Elna: RSH, RSG, RSE, RC2S, RC3S
The production of capacitors that contain quaternary ammonium salt compounds was ended in September 1998. The final one was Nichicon PF series. The PF series was kind of special version with expensive materials both rubbers and lead wires used. These had extended lifespan over the other caps above, but still it was shorter than conventional ones.
The problem was the use of quaternary ammonium salts.
the following capacitors from this time period had issues:
Nichicon: RZ, RT, VZ, ET, PR, PY, PF, PL, PQ, PG, MX, WX, WP, MP
Nippon Chemicon: LXF, TXF, SXE, SXG, MVK, MFK, MVF, MFF
Elna: RSH, RSG, RSE, RC2S, RC3S
The production of capacitors that contain quaternary ammonium salt compounds was ended in September 1998. The final one was Nichicon PF series. The PF series was kind of special version with expensive materials both rubbers and lead wires used. These had extended lifespan over the other caps above, but still it was shorter than conventional ones.
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