Can anyone point me to a 120 volt indicator light that mounts on a DIN rail? It doesn't have to be big; just terminal block with a LED and resistor would be fine.
Why don't you just get a dinrail midget fuse holder with blown fuse indication. Don't put a fuse in, superglue it shut, put line voltage in the top and the neutral in the bottom. Job done for about $2.00.
Again, thank you all for those excellent suggestions.
I ended up going in a different direction from my original requirement. Instead of a DIN-rail-mounted solution, I decided to use a metal box with neon indicator lights mounted on the cover. It's inexpensive, and it puts a lot of lights in a small area, which is important since I'm short on "real estate" in the enclosure. I'll mount the box either on the enclosure's subpanel, or on the inside of the door.