Class-X and Class-Y capacitors must be connected directly to AC lines (line-to-neutral or line-to-ground) in order for them to perform their duties to minimize electro-magnetic interference (EMI) and to minimize radio frequency interference (RFI).
- WD (X1Y1) KL (X1Y2)
- WD: X1 = 760/660/400Vac, Y1=500/250Vac
- KL: X1 = 500/440/400Vac, Y2=500/300/250Vac