Abstract: A jumper for an electrical terminal for electrical connecting a conductor rail of the electrical terminal includes a head part and a resilient pair of clamp tongues that engage into an opening of the conductor rail. Each clamp tongue includes an inner side and an outer side. The outer sides form a contact area to contact the opening. The clamp tongues are biased with a spring load such that the inner sides of a pair of clamp tongues are arranged opposite to each other, and in a non-contact state are disposed spaced apart from each other. Each clamp tongue extends from the head part towards a tip. Each inner side has a contour such that in a contact state the clamp tongues abut against each other and a gap between the inner sides is formed between the head part and the tips.

Abstract: An overvoltage protection device includes two electrodes and an air breakdown spark gap between the electrodes. Also provided is a housing for the electrodes. An arc occurs in the air breakdown spark gap upon an ignition of the gap. An impedance is connected in parallel with the air breakdown spark gap so as to form a parallel arrangement. An insulating gap is connected in series with the parallel arrangement.