BACKGROUND:
Hmmm ... I love a mystery which requires research and I ultimately end up with a solution. Unfortunately, the capacitor has not satisfied my need for a solution and a couple of points remain a mystery (to me)
Mystery 1 ... I am not sure of the background to this cap, I suspect it may be a 'pull' as I don't recall using these in any products we designed many years ago. Perhaps I thought at the time "Hmmm ... this looks interesting" and put it in the spare parts boxes, no idea really. Just to be safe, I will say this is a USED capacitor.
Mystery 2 ... it's all about the markings on the side of the capacitor. While the value and type is clearly understood, the same cannot be said for the working voltage and other markings on the capacitor. An image search on Google confirmed what I already know except "it" stated that is was a 630V capacitor ... I am not convinced of this.
Let me describe this capacitor ...
WIMA - Metallised Polyester Capacitor
Made in Germany
Old Stock
Series Type: MKS-4
Value: 0.022uF (22nF)
Now it gets interesting ... here is a small photograph of the capacitor markings for reference
The working voltage is undetermined ... although Google suggested it is a 630V unit, I am tending towards 63V working, with a badly formed V (looks more like an incomplete 0 to Google)
No idea of the meanings of these markings
- B
T 2
100kHz
The last reference to 100kHz is possibly something to do with the capacitor reactance at that frequency but I really don't know. While I am big on sustainability, I don't want to spend hours researching this capacitor any further!
I did have a look over the WIMA datasheet for these capacitors and although it has a section outlining the codes used on their capacitors, it didn't help me at all.
HERE is a link to the datasheet
Even looking at the dimensions didn't really help with the voltage rating ...
This capacitor measures: 12.9mm Length x 11mm Height x 4.9mm Wide
These dimensions are LARGER than the datasheet indicates for 63V or 630V capacitors!
The leads are fairly short at just 5mm length
TESTING:
Yes, of course I made some basic tests of the capacitor ...
Value: 21.92nF
Vloss 0%
ESR 0.01R
I have now placed this capacitor into a sealed clear plastic packet and it now waits for some enterprising fellow to find a use for it!
