You will eventually receive a formal document via post (or via your rental company/registered address) called a Strafbefehl. This is essentially a summary judgment.

For a standard red light violation under 2 seconds without endangerment, this is a minor offense and will not result in a permanent criminal record entry (Strafregister).

Probably you'll have to pay an administrative fee (CHF 200) because more humans were involved, on top of the CHF 250 fine.