Electrical feedthrough

A feedthrough, comprising:

• a main body including at least one passage opening running through the main body, the main body including titanium or a titanium alloy;
• an insulation material accommodated in the at least one passage opening running through the main body, the insulation material including glass, the insulation material having a contact angle of less than 90 degrees in at least a portion of the insulation material with respect to the main body, the glass of the insulation material has a glass composition including B2O3 and SiO2, wherein a ratio of a proportion of B2O3 in percent by weight to a proportion of SiO2 in percent by weight is between 0.45 and 0.65;
• and
• at least one electrical conductor extending through the insulation material accommodated in the at least one passage opening.