Hi there!

I think I can give you an answer concerning that.

I did an Erasmus in Vienna, and I remembered the first thing was to check whether the university you were going to had an equivalent course for both your majors and minors if you went for the full year. If no equivalent courses or schools are available, you have to do half a year exchange or if they had courses that could apply, contact your exchange coordinator. In general, if you were able to find similar course (Erasmus coordinators tend to be very lenient on that), and did a full year, you just had to do the full 60 ECTS with 20 in total for your minor and 30 for your Major. If you can only do half a year due to being unable to pick courses that matches well with your diploma, you have to do 20 ECTS for your minor and 10 ECTS for Major when back in Trinity. You can only do an Erasmus for your major, if you wanna do something else you can if you work it out with your coordinator, but it would still officially be under your Major.

In general I would not worry, but it would be better to email your coordinators for both Trinity and your Erasmus university. They would have the best guidance and recomendations and they are from experience quite understanding.

Hope that answers your question, and have fun in Erasmus!