12v relay is a versatile product, widely used in home appliances, such as air conditioners, color TVs, refrigerators, washing machines, etc.; also used in industrial automation control and instrumentation. Among electronic components, relays are generally considered to be the most unreliable electronic components. In the reliability design of the whole machine, relays, potentiometers, adjustable inductors and variable capacitors are listed as recommended not to be used or to be used less often. element.

Since the relay is a mechatronic component, it is composed of electromagnetic and mechanical transmission parts. Compared with other electronic components, it is much more complicated. In addition, some assembly adjustments in the manufacturing process are manually operated, so the consistency of the product is and less reliable. However, if some preventive measures are taken in use, satisfactory results can still be achieved. In the failure analysis of the failure relay, it was found that the failure caused by the use accounted for more than 30%. It can be seen from the above analysis that the reliability of the relay is not high. In addition to its own quality reasons, improper use is also a major reason. Now, we focus on how to improve the reliability of the relay in use.