These power the ceramic heating element, as well as provide the soldering iron handle access to the thermocouple that’s placed near the actual tip. With a simple diagram [Clive] explains how ...

There was a time when decent quality soldering irons ... package containing the iron itself for $24.99 and its default tip, and another similar package containing the fine tip set for another ...

It comes as wire on a spool, heated to its melting point by an electric tool called a soldering iron (or soldering gun). Soldering is most commonly used to join wires in electrical circuits ...