I just broke my sewing machine (it's an old Viktoria machine about 30-40 years old) and now I am looking for a replacement safety capacitor. The one installed is a RIFA PME 271 M 547 paper capacitor.
I have looked online and found a replacement on ebay
RIFA KONDENSATOR 275V~ SH 47n X2 PME271M 40/100/56/C or this one EVOX RIFA – PME271M547M – CAPACITOR, CLASS X2, 0.047UF.
My problem is, that the old Capacitor has a different number sequence.
It's a bit hard to see but it reads 40/065/56 while all capacitors I found had 40/100/56. I tried to find out the meaning of this values but could not find an answer.
Questions:
- Is it ok to buy the capacitors I found?
- What do these numbers mean?
Any answer is appreciated
Best Answer
I would not be replacing a failed RIFA cap with an Ebay example of the same part of unknown age.
These old parts are notorious for failing in a cloud of foul smelling smoke, generally 30+ years after being made, basically the housing cracks, moisture gets in and it all goes sideways.
The original is a 47nF 250V Class X2 cap.
Farnell have R463F247050N0K for less then your ebay part, that is coming from a proper distributor and will be of recent manufacture.
Basically the important things for a cap in this role are that it be class X2, and rated for at least 250V, capacitance is not that critical.