Quick fuse question

[WhiteSE]

The power supply for my Modwright N999ES CDP is blew a fuse. The fuse reads E.3A/250V and the elements is one of those solid with wire wound around it.

I do not see any 0.3A/250 that do not have a single thin wire in them unlike my fuse. Is it safe to assume though that my PS fuse is slow blow?

Do you think 0.3A is correct and not 3A? given the gear it is in?

 

[Chris Brown]

Probably 3 amps.

If it was less than an amp, it would likely be rated in mA (milliamps).

 

[WhiteSE]

Probably 3 amps.

If it was less than an amp, it would likely be rated in mA (milliamps).

that makes sense..all the 3A I saw match my fuse visually.

 

[R-2-R]

This is just my opinion.....

What does the owners manual say or have listed as far as fuse amperage and voltage rating/size?

If not look at the back of the unit and it should have the fuse amperage and voltage rating/size listed next to the fuse holder.

If the fuse is inside of the unit the amperage and voltage rating/size should be listed next to the fuse holder.

One should 'always' first consult with the original owners manufacture's manual for fuse replacement. The owners manual take's precedance before anything else and will save you time and problems.

Never take for granted the rating/size on the fuse that you just removed because if you were not the original owner then there is always the possiblity of the previous owner putting in an incorrect fuse rating/size in the unit.
Of course this would not apply if you are the original owner who brought the unit brand new from the store.

 

[WhiteSE]

I will search again on the unit...this is not a Sony factory unit PS, and I didnt get a manual or schematic with it...

BUT, as you wisely mentioned, its listen in the back as 1A slow blow....It doesnt say the voltage though.

This is just my opinion.....

What does the owners manual say or have listed as far as fuse amperage and voltage rating/size?

If not look at the back of the unit and it should have the fuse amperage and voltage rating/size listed next to the fuse holder.

If the fuse is inside of the unit the amperage and voltage rating/size should be listed next to the fuse holder.

One should 'always' first consult with the original owners manufacture's manual for fuse replacement. The owners manual take's precedance before anything else and will save you time and problems.

Never take for granted the rating/size on the fuse that you just removed because if you were not the original owner then there is always the possiblity of the previous owner putting in an incorrect fuse rating/size in the unit.
Of course this would not apply if you are the original owner who brought the unit brand new from the store.

 

[R-2-R]

On fuse's try to keep the following 'important' information in mind for safe practice....

1.) VOLTAGE RATING....if the unit list the fuse voltage rating at 125V then it is O-K and safe practice to replace a fuse with a voltage rating of 250V, that is if you cannot find a 125V rate. There is no harm in that because your just over protecting the circuit. In other words it is always safe practice for the voltage rating of the fuse to be used as being as equal to or "over-voltage" rated. "Never" use a fuse with a lower voltage rating (say 115V) than what is listed in the owners/service manual!

2.) AMPERAGE RATING....if the unit list the fuse amperage rating as, say, 3 amp's one should always replace the fuse with the 'exact' amperage rating as listed. "Never" use a fuse of with an amperage rating higher than (say 3.5 amp's or 4 amp's) what is listed on the unit or owners/service manual!
Your only asking for major problems.


Now there are some individuals that say for a 'temporary' fix, to replace a fuse with a slightly lower amperage value, say 2 amps, which will probably work but I would actually not recommend doing so. This should only be temporary and one should replace the fuse with the proper amperage rating as soon as possible.
Keeping in mind again, that one should 'never' replace a fuse with a higher amperage rating than what is called for, always equal too or lower rating value.

 

[WhiteSE]

It was the tube after all!!