250Vac Non-Safety Rated AC Capacitors Syfer / Knowles 250Vac Non-Safety Rated AC Capacitors are designed for up to 250Vac/60Hz continuous use and for nonsafety-critical applications where extended capacitance ranges are required. These 250Vac non-safety rated AC capacitors are available in case sizes 0805 to 2220 in both X7R and C0G/NPO dielectrics with capacitances up to 120nF. The capacitance ranges for these capacitors are divided into four groups which are based on the voltage coefficient of capacitance: C0G/NPO which has negligible capacitance shift with applied voltage and three subgroups of X7R.