MOV Replacement

[Ed Hall]

Time for me to query something:

Apparently, this set caught a surge. The Fuse and MOV on the left valliantly gave their lives to save it. As can be seen, there is a breach around the perimeter of the MOV on the left, which allowed the magic smoke to exit forcefully, staining the MOV on the right. I think the right MOV is still OK, but will probably replace it as well, for good practice. The one on the left was connected hot to ground and the one on the right was connected neutral to ground.

But, concerns arise:

1. the MOVs have different numbers and I can't find the specs or a source for either
2. are these not MOVs
3. should I be concerned with obtaining matching parts
4. I can see where there could be a different protection value for hot vs. neutral, but would it be that big a concern as to use precise components

The top numbers on the MOVs are 10E241 and 10E271

Thanks! (If this thread belongs elsewhere, please feel free to move it.)

[budm]

Re: MOV Replacement

10E241 = 10mm Diameter, 150Vac RMS.
10E271 = 10mm Diameter, 180Vac RMS.
You can get them from digikey or mouser, just match dia and voltage.

[retiredcaps]

Re: MOV Replacement

I think the right MOV is still OK, but will probably replace it as well, for good practice.

A good MOV should measure 0L ohms on your multimeter.

I agree that you should replace it because they are relatively inexpensive.

[Ed Hall]

Re: MOV Replacement

Thanks much.

Does the diameter play a critical role?

[budm]

Re: MOV Replacement

The Dia (bigger size) will handle more surge current.