Canonicly the B'rel has only appeared once in Star Trek.
Sorry, they don't specifically label it every time you see it but you know it when you see it, a lot. In TOS it was just in the movies. St3,4,5,6. It's the same general model in TNG for the larger version, the KVort, but in size comparisons we still see the smaller Brel a lot, especially in ds9. They just don't specifically state what class they are beyond a bird of prey, typically. Maybe they say it's a d-14 or whatever every now and then, but that is more of the specific model of the Brel.