Introduction: Replaceing a Soldered in Fuse.

About: No longer working, but was a specialist maintenance worker when I did. Masters Electrician Lic. and Assoc. degree in Computer Networking. Had a fiber optic license but gave it up when I quit working. Repair co…

Some times replacing a blown fuse isn't as simple as it should be.

Step 1: Why Do They Solder a Fuse Streight to the Board?

I started using a 3D printer and managed to ruin two power supplies. The first one blew a component so I bought a larger one to address the power draw and it was working fine until I goofed and pluged it in a little to fast and blew the fuse (no on/off switch which was addressed later). The fuse in the power supply (like the first one) was soldered in and to replace it I would have to remove the board. Some of the components on the board were fastened to the case and I didn't want to mess with that. Expecting I may blow another fuse down the line I decided to put in a replaceable fuse.

Step 2: Check You Options

There were a couple of options for this, one was an external fuse holder that I would have to drill a hole in the case for but I didn't like that idea. I found a fuse holder that fit the fuse in the supply. Because this was the same size holder it just clipped on the fuse upside down.

Step 3: KISS

There was plenty of space to put a standard 1/4" fuse holder on the board so I opted for that.

Step 4: KISS Again

I could have used quick connects for the wiring, but chose to solder instead. A little heat shrink to make it tidy and done.

Step 5: Easy Is Some Times Best

Not wanting to drill into the board I opted for gluing the 1/4" holder. RTV Silicone work great.

Step 6: Almost Done

After the silicone had time to set all that was left was to connect the small fuse holder to the fuse.

Step 7: Happy Ending

All that was left was to wire and test. Green light is good!