heater keeps tripping surge protector_mini cooper fuse box factory

05 2024-09

　　What is the function of a patch self-healing fuse

　　For some industry newcomers, they may not know the definition and function of patch fuses. Surface mount self-healing fuses are used to protect electronic devices from damage in the event of circuit abnormalities, greatly reducing damage. The common fuse is a fusible fuse inside a light bulb, so what is a patch self-healing fuse? According to its literal meaning, it can automatically return to a normal state. What is the function of a patch self-healing fuse? SMD self recovery fuse is an overcurrent electronic protection component made of polymer organic polymers under high voltage, high temperature, and sulfurization reaction conditions. It is processed by special processes after adding conductive particle materials. SMD self-healing fuse is a positive temperature coefficient polymer thermistor that can replace current fuses.

　　The temperature of the patch self-healing fuse during normal operation is relatively low, achieving balance. When in a low resistance state, it does not work. When the current flowing through the patch self-healing fuse increases or the temperature rises, but the heat generated and dissipated are still balanced, it still does not work. When the current or ambient temperature rises again, the patch self-healing fuse will reach a higher temperature. If the current or ambient temperature continues to rise at this time, the heat generated will be greater than the dissipated heat, causing a sudden increase in the temperature of the patch self-healing fuse. At this point, small temperature changes can cause a significant increase in resistance, and the patch self-healing fuse is in a high resistance protection state. After troubleshooting, it will quickly cool down and return to its original low resistance state, and resume operation.

　　What is a self-healing fuse: A self-healing fuse is an overcurrent electronic protection component that uses polymer organic polymers mixed with conductive particle materials and processed through special processes under high voltage, high temperature, and sulfurization reaction conditions. Self healing fuse (PPTC: Polymer Self healing Fuse) is a positive temperature coefficient polymer thermistor used for overcurrent protection, which can replace current fuses. According to actual market demand, the self recovery fuses developed and produced by TAG Electronics are divided into two types: patch type self recovery fuse boxes and plug-in type self recovery fuses. The function of the patch self-healing fuse: During normal operation, the temperature is relatively low, and the heat generated and dissipated reaches a balance. The PPTC component is in a low resistance state and is not functioning. When the current flowing through the PPTC component increases or the ambient temperature increases, but if a balance is reached between the generated heat and the released heat, the PPTC still does not function. When the current or ambient temperature rises again, PPTC will reach a higher temperature. If the current or ambient temperature continues to rise during this stage, the generated heat will be greater than the dissipated heat, resulting in a sudden increase in temperature of the PPTC components. At this stage, small temperature changes will cause a significant increase in resistance, and the PPTC component will be in a high resistance protection state. After troubleshooting, the PPTC component quickly cooled down and returned to its original low resistance state, allowing it to function again like a new PPTC component.