How many times can the polymer self-recovery fuse work under "maximum voltage" and "impulse current"?

Question: How many times can the polymer self-recovery fuse work under "maximum voltage" and "impulse current"?
 
A: Each polymer self-recovery fuse has a specific working voltage and pulse current. According to the safety regulations, the polymer self-healing fuse must still show PTC effect after running for 6000 times. According to the communication equipment, under the highest voltage, after more than ten or hundreds of actions, the performance parameters are still within the original range.