Feedthrough for applications at high pressure

A feedthrough, comprising:

• a main body having at least one passage opening that extends through the main body;
• at least one first functional element which is disposed within the at least one passage opening and is connected to the main body in a fluid-tight manner;
• and
• an insulation material that surrounds at least some regions of the at least one first functional element and establishes the fluid-tight connection to the main body, wherein, within the at least one first functional element, there is a pressure-guiding channel by which pressure components that have arisen as a result of pressure are guided from within the at least one first functional element outward to the surrounding insulation material such that a pressure resistance of the fluid-tight connection of the at least one first functional element to the main body is elevated, the insulation material comprising at least one of glass, glass-ceramic material, or ceramic material.