Understanding Safety Capacitors through Safety Capacitor Silk Screen Printing

The development of science and technology has enabled people to create many electronic products that improve people's living standards and facilitate people's lives. These electronic products can work as long as they are connected to the power supply. In the switching power supply and electronic circuits, there is an electronic component that can protect the circuit. This electronic component is the safety capacitor.

The full name of safety capacitor is capacitor for suppressing electromagnetic interference of power supply. If the external power supply is disconnected during use, the safety capacitor will quickly release the internal charge. At this time, you will not get an electric shock if you touch it with your hands, which greatly ensures personal safety. It complies with safety testing and safety certification, and its shell is printed with safety certification marks of many countries. Therefore, it is used in switching power supplies and circuits to protect circuits and human bodies from harm caused by electric current.

Safety capacitors are widely used in small household appliances, power products, electromechanical motors, LED lighting, chargers, etc.

Safety capacitors are very common, but how can we know the information about safety capacitors when choosing? In fact, we can get the information we want to know through the silk screen printed on the shell of the safety capacitor. For example, the capacitance, capacitance tolerance, safety certification, etc. of the safety capacitor can be obtained through the silk screen printed on the shell of the safety capacitor.

The picture below is a safety Y capacitor of the brand Zhixu JEC. Let’s take a look at the silk screen on the shell.

Zhixu Electronics Safety Capacitors

1. Safety capacitor capacitance

The capacitance range of safety capacitors is 10pf~10000pF, while the capacitance of Zhixu JEC's safety Y capacitor is 4700pF, which is relatively large.

2. Safety capacitor capacitance error

During the manufacturing process, it is impossible to ensure that the capacitance of each capacitor is consistent with the nominal value. There is always a certain deviation, which is the capacitance tolerance of the capacitor. The capacitance tolerance of the capacitor is expressed as a percentage. Class J: ±5%, Class K: ±10%, Class M: ±20%, Z: -20%~+80%. Among them, those with a tolerance of less than 5% can be called precision capacitors, while general capacitors are mostly J, K, and M grades.

The capacitance tolerance of Zhixu JEC's safety Y capacitor is M level: ±20%, which has a large error.

3. Safety Capacitor Safety Certification

In order to protect the personal safety of consumers and safeguard their related interests, my country has formulated some relevant regulations to regulate and reduce the appearance of inferior counterfeit safety capacitors that harm others. It is also stipulated that safety capacitors that have not passed safety certification and electronic products that require safety certification cannot appear or be sold on the market. Safety certifications include my country's CQC, the United States' UL, the European Union's ENEC, Germany's VDE, South Korea's KC, etc.

Zhixu JEC's safety Y capacitors have safety certifications from many countries, including CQC, ENEC, VDE, UL, and KC. This shows that Zhixu JEC's safety Y capacitors have passed safety certifications from many countries and can be sold. This also indirectly proves that Zhixu Electronics' safety capacitors are of good quality and guaranteed quality.

Zhixu Electronics Safety Capacitors