Who knows what K63 means? I think it comes from an old Philips CRT.
It looks like a blue capacitor It says: N47K63
I think N47 stands for 47 nanoFahrad, but what can K63 mean?
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N47 usually does not mean 47 nF, but 47K can mean 47000 pF which is 47 nF.
63 means 63 Volts maximum voltage. Since it is not written that that is AC, assume it is DC so the maximum voltage is 63 V DC. Although that sounds like an odd value, it is often used.
So My guess is that this is a 47 nF, 63 V capacitor. I'd use an MKT model if it needed to be replaced.