Ceramic Safety Capacitors

These safety capacitors are also known by other names including emi rfi suppression capacitors and ac line filter safety capacitors.

Ceramic safety capacitors. A ceramic capacitor is a fixed value capacitor where the ceramic material acts as the dielectric it is constructed of two or more alternating layers of ceramic and a metal layer acting as the electrodes the composition of the ceramic material defines the electrical behavior and therefore applications. An example of a class y capacitor. Offering the benefits of simple pick and place assembly reduced board space required and lower. The film type are made of self healing metalized polyester polypropylene or paper and usually come in a box style casing as the capacitor is encased is a flame retardant or flame proof case.

These line rated ac rated. Safety capacitors are grouped into a number of different sub classes. Application voltages range from 400 to 760 vac nominal. X1 y2 safety recognized ceramic disc capacitors are specifically made for high voltage ac alternating current applications.

Safety certified capacitors syfer technology s safety certified capacitors comply with international ul and tüv specifications to offer designers the option of using a surface mount ceramic multilayer capacitor to replace leaded film types. Capacitors and schematics for antique tube radios. Safety capacitors are high voltage circuit specific capacitors commonly rated at 250 vac. Tecate group offers x and y safety capacitors in both ceramic smd styles and polypropylene film capacitors in a radial.

X1y2 safety capacitors are versatile and can safely be used as both line bypass line to ground and accross the line capacitors. For x type capacitors there are sub classes x1 x2 and x3. Safety capacitors are available in ceramic disc and metalized film or paper. Rfi safety rated x y ceramic capacitors manufactured by vishay a global leader for semiconductors and passive electronic components.

For x type capacitors kemet offers sub class x1 devices. Rfi is simply higher frequency emi figure 1. Image from this teardown. Emi stands for electromagnetic interference and rfi stands for radio frequency interference.

For y type capacitors there are sub classes y1 y2 y3 and y4.