Self-healing fuse material itself is not easy to age. The aging phenomenon of self-healing fuse device is due to the close combination of metal electrodes at both ends of the device and self-healing fuse material. The self-recovery fuse has strict rolling process control to ensure that the performance of the self-recovery fuse will not deteriorate in 1000 hours under the harsh environment of 85℃ and 85% relative humidity.
After many actions, the resistance value of the self-recovery fuse will be higher than the initial resistance. When the resistance value exceeds the maximum resistance parameter R1max after operation, the fault indicates that the manufacturer cannot guarantee that the equipment will not operate under the holding current IH. The failure times are related to the recovery time after each action of PPTC. The longer the recovery time, the more times it can be tolerated. The test condition of self-recovery fuse is 120 seconds after each action, and the performance is guaranteed after 1000 action cycles.
Possible faults of self-recovery fuse include: multiple actions, long-time actions, voltage exceeding rated working voltage Vmax, fault current exceeding rated operating current Imax. The fault is characterized by performance parameter degradation or open circuit.
