Surge protector

The embodiment of the utility model provides a surge protector. The surge protector comprises a function module; the base comprises a concave part and a mounting part, and the concave part can be used for the function module to be inserted and pulled out in the inserting and pulling-out direction; the limiting piece is arranged on the side wall of the functional module; the lock catch assembly is arranged on the mounting part of the base and can be matched with the limiting piece, under the condition that the lock catch assembly is located at the unlocking position, the lock catch assembly allows the function module to be inserted into and pulled out of the base in the inserting and pulling direction, and under the condition that the lock catch assembly is located at the locking position, the lock catch assembly can be matched with the limiting piece. The lock catch assembly can prevent the function module from being inserted into and pulled out of the base in the inserting and pulling direction. 本公开的实施例提供了一种