There are many kinds of electronic components and capacitors, there are always so many kinds of capacitors like twins that make it unclear, people who are not familiar with capacitors are easy to make mistakes when purchasing, and find that they can't use it after buying it back, not only wasting time and energy but also wasting money. For example, ceramic capacitors and safety Y capacitors, they are similar in appearance, but there are still certain differences in performance.
Safety Y capacitor is a kind of safety capacitor, when the external power supply is powered off and quickly discharged, people will not have the feeling of electric shock when touching, even if the safety Y capacitor fails, it will not cause electric shock, endanger people, the shape is disc-shaped, and the color is blue.
Ceramic capacitors, also known as porcelain dielectric capacitors or monolithic capacitors. It is used to extrude a high dielectric constant ceramic (barium titanate-titanium oxide) into a round tube, disc or disc as a medium, coated with a metal film (usually silver) through high-temperature sintering to form an electrode, and then weld a lead wire on the electrode, coated with protective magnetic paint, or encapsulated with epoxy resin. The shape is disc-shaped, mostly blue, but also yellow. Different ceramic materials have different properties in terms of performance.
It can be distinguished from the appearance of the silk screen: the safety Y capacitor silk screen has CQC, UL, ENEC, KC and other national safety certifications, while the ceramic capacitor does not need a safety certification certificate.
Distinguish from use: If you want to use it in filtering, bypass, coupling and DC blocking circuits, it is recommended to buy ceramic capacitors. If you want to use it for common mode filtering between the neutral line and ground, between the live wire and the ground, it is recommended that you choose a safety Y capacitor.