# Help identifying ceramic disc capacitor

I have a blue ceramic disc capacitor and I'm trying to work out the values. On one side of the disc are the following characters, in approximately this pattern:

  SHM
X 1400-
Y 1250-
E 222M
F


The other side has a bunch of logos and symbols which I can't make out. I imagine the capacitor is 22 nF, but I'm trying to work out the working voltage is.