Ceramic Y Capacitors

A ceramic capacitor is a fixed value capacitor where the ceramic material acts as the.

Ceramic y capacitors.

Capacitors ceramic capacitors are in stock at digikey. X capacitors effectively absorb symmetrical balanced or differential interference. Ceramic failure mode also tends toward short circuit whereas metallised paper and film types tend towards open circuit. Because 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 emi and rfi filtering functions they must be rated and certified as safety capacitors both class x and class y capacitors have subclasses.

Ac line rated ceramic disc capacitors class x1 400 vac class y4 125 vac. Capacitors ship same day. Subclass x1 x2 and x3 and subclass y1 y2 y3 and y4. A y capacitor can take the place of an x capacitor in an across the line application only when absolutely necessary though this is highly uneconomical.

Generally x capacitors work for across the line applications and y capacitors work for line bypasses or line to ground applications. Ceramic capacitors exhibit low parasitics and excellent emi filtering capabilities. Y capacitors are connected in a line bypass between a line phase and a point of zero potential to absorb asymmetrical unbalanced or common mode. For y capacitors ceramic types are less expensive than metallised film but unstable over time and temperature and less mechanically stable.