Bussmann(BP/ATM-A6LP-RP) ATM-LP Low Profile Fuse Assortment Kit - 6 Piece

Q: Is the current rating on the fuse identified by number? or only by color?

The current rating on these fuses are indicated through both number and color.

Q: Will these work on a 2018 Mazda CX-5?

These fuses fit my Toyota Corolla Axio. If the fuse receptacle of the Mazda is of similar size, they will work.

Q: Are these the micro fuses? The real tiny ones?

yes. I used them in a Ford F450, but sure they are used for other things. About 1/4 to 3/8" square. Be sure you don't confuse those with the mini "blade" fuses, about the same size but have contacts only at the end. See http://ecx.images-amazon.com/images/I/71C0MbJnKAL._SL1500_.jpg These have contacts along the sides.