| definitions (iec 384-14 1993) X FUNCTION: applications where the capacitor failure does not lead to danger of electrical shock. There are three subclasses related to the peak voltage of the impulses superimposed to the mains voltage: Subclass X1: impulses up to 4000V Subclass X2: impulses up to 2500V Subclass X3: impulses up to 1200V Y FUNCTION: applications where the capacitor failure may lead to danger of electrical shock. There are four subclasses related to the peak voltage of the impulses applied before the life test: Subclass Y1: impulses up to 8000V Subclass Y2: impulses up to 5000V Subclass Y3: rated 250Vac without impulses Subclass Y4: impulses up to 2500V how to order
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