Common methods for evaluating the performance of SMD Capacitors

the first is the four general electrical properties of the SMD capacitor, namely capacity cap. loss DF, insulation resistance ir and voltage resistance DBV , generally, the loss value of X7R DF <= 2.5%, the smaller the value, the better, ir * cap> 500 euro * method, BDV> 2.5ur. the second is the acceleration performance of the SMD capacitor, in 125deg. c Environment Temperature and the chip can withstand 100 hours without breakdown, good quality and good resistance no breakdown within 1000 hours. The second is the heat-resisting impact performance of the product. The capacitance is immersed in 300deg. c-tin FURNACE in 10 seconds, do a few more particles, and check if there is any surface crack under the microscope, then we can test the capacity loss and compare it with the thermal shock to determine whether the chip has internal cracks. the quality of the SMD capacitor may be poor when the chip capacitor is faulty in the circuit, it may also be caused by factors such as poor specification selection during design or thermal impact of mechanical force on the surface mount, which may cause some damage to the SMD capacitor.