Littlefuse P/N 03440404X
Blown Fuse Indicating Holders for 3AG and 3AB 1/4" x 1-1/4" Fuses
Neon lamp glows when fuse is blown!
5/8" Panel Mount (Maximum panel thickness is .250”)
Mounting hardware included (Neoprene washer, lockwasher & hex nut)
Rated 100-125V @ 20A
See Datasheet for exact dimensions
If used in a DC circuit, the neon lamp won't glow unless the voltage is ~90V minimum
When designing indicating type fuseholders into a circuit, consideration should be given to the resistance
of fractional amperage fuses and the parallel resistance of the indicator lamp and its resistor (47K in this case)