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|type = [[Passivity (engineering)|Passive]]
|working_principle =
|invented = [[General Electric]]<ref name="electroschematics.com">{{cite web|url=https://www.electroschematics.com/6904/programmable-unijunction-transistor-put-flasher-circuit/|title=Programmable Unijunction Transistor Flasher|author=Jim Keith}}</ref>
|first_produced =
|symbol = [[Image:PUT symbol.png|120px]]
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