identificationplug
What is the purpose of the gap on the live pin of this plug?
I've never seen this before and was why this gap was their since the plug is only for an alarm clock.
The gap goes down the middle of the live pin to half way down the pin the pictures below show the plug.
They are mini-banana plugs and jacks. Pomona is one company that makes them:
http://www.pomonaelectronics.com/pdf/d2945_100.pdf
http://www.pomonaelectronics.com/pdf/d2143_1_01.pdf
Digi-Key stocks them.
It's a piezoelectric buzzer. Probably like this:-
which has this data sheet. Small tip for the future. Google knows everything. Literally everything. I just typed the part number into it.
PS. I'm extremely impressed that such a crummy part has a frequency response analysis for it.
Best Answer
The live pin has a gap because the part on the other side of the plastic forms the fuse clip. The gap will have no affect on the current-carrying capacity of the pin, but the two parts on either side of the gap form the fuse clip as your photo shows very nicely. Clever design.