most of the distributors have on their websites a "view similar" area, and it will show any similar items . and also you can compare items by hitting a compare check
box next to that item. I use the one on "Mouser Electronics" site frequently. you can sort from any of the features you desire. ive been using "PMBT2222A" in place of
the 2n3904 if i can,(its got a higher ma rating)