Safety ceramic capacitors are safety capacitors. Safety capacitors are used in such occasions that after the capacitor fails, it will not cause electric shock and will not endanger personal safety. Among them, the capacitors with rated voltages of 400V and 300V are named Y1 Y2 capacitors, that is, safety ceramic capacitors. Safety regulation ceramic capacitors are used for AC and require safety certification.
1. Features and uses of safety ceramic capacitors
The safety ceramic capacitors are small in size and compact in size, suitable for use in jumper circuits, with stable electrical performance, self-healing performance and explosion-proof functions. It meets safety standards and is suitable for starting and running of single-phase motors powered by AC power with a frequency of 50Hz (60Hz) and requiring high safety performance.
2. Technical requirements for safety ceramic capacitors
Temperature range: -25℃-+125℃.
Capacitance range: (Y1 capacitor) 10PF-10000PF; (Y2 capacitor) 10PF-10000PF.
Capacitance deviation: ±10% (K); ±20% (M).
Rated voltage: (Y1 capacitor) 400VAC; (Y2 capacitor) 125VAC 250VAC~300VAC.
Temperature coefficient: (Y1 capacitor) Y5P±10%; Y5V+20%; Y5U+20%, (Y2 capacitor) Y5P±10%; Y5V+20%; Y5U+20%.
Loss: Y5P: 2.5%max at 25℃ ASN 1KH 1±0.2Vrms.
Insulation resistance: (25℃): (Y1 capacitor) 10000MΩ at 500VDC for 1minute at 500VAC for 60 seconds-insulation resistance 10000M; (Y2 capacitor) 10000MΩ at 500VDC for 60 seconds.
Dielectric strength: (Y1 capacitor) 4000VAC for 60 seconds-AC400V; (Y2 capacitor) 2600VAC for 60 seconds-AC300V.
Peak pulse voltage overvoltage level (IEC664) allowed in safety ceramic capacitor safety level applications.
The capacitance of the Y capacitor must be limited, so as to achieve the purpose of controlling the size of the leakage current flowing through it and the impact on the EMC performance of the system under the action of the rated frequency and rated voltage. GJB151 stipulates that the capacity of Y capacitor should not be greater than 0.1uF. In addition to complying with the corresponding voltage withstand voltage of the power grid, Y capacitors also require that such capacitors have sufficient safety margins in terms of electrical and mechanical performance to avoid breakdown short circuits under extreme harsh environmental conditions. Protecting personal safety is of great significance.
At present, safety ceramic capacitors are widely used in various electronic products, which are closely related to our lives. The quality of safety ceramic capacitors is directly related to our quality of life and safety. When choosing safety-regulated ceramic capacitors, please choose the original authentic products, which are certified by the safety regulations of various countries, with guaranteed quality and safe use.
