# Does voltage matter on fuses?

## Does voltage matter on fuses?

Yes, very important! The voltage rating of the selected fuse must be greater than or equal to the circuit voltage. Since fuses have such low resistance, the voltage rating becomes critical only when the fuse is trying to open.

## Can you replace a 125 volt fuse with a 250 volt fuse?

For example, a 125V fuse can be replaced with a 250V fuse of equal amplitude while the voltage of the application is 250V or lower, but a a 250V fuse can’t be replaced with a 125V fuse of equal amplitude if the voltage of the application exceeds 125V.

Why does a fuse have a voltage rating?

The voltage rating of a fuse is a function of its capability to open a circuit under an overcurrent condition. Specifically, the voltage rating determines the ability of the fuse to suppress the internal arcing that occurs after a fuse link melts and an arc is produced.

### Does fuse amp matter?

The most important thing to remember for the fuse holder is that the voltage and current rating need to be higher than what will actually be present on the circuit. If there is a 10 amp fuse, using a 20 amp fuse holder will be no problem; whereas using a 10 amp fuse holder with a 20 amp fuse will likely cause problems.

### What are fuses rated by?

Fuses are first rated by the ac and/or dc circuit voltage into which they can be safely applied. A fuse installed in an AC circuit performs differently than when installed in a DC circuit. With AC circuits, the current is crossing the zero potential at 60 or 50 cycles a second.

Can I replace a ceramic fuse with a glass fuse?

You can replace a glass fuse with ceramic, but not recommended to replace a ceramic with glass. Be sure they are the same voltage and amp rating, slo-blow, etc.

## Can I replace a fuse with a higher voltage?

It is designed to protect over- current. You cannot apply a fuse with a max voltage rating that is less than the application voltage. As long as the application voltage is less than 250V, you can replace a 125V fuse with a 250V one.

## How do I choose a fuse rating?

In order to select the right amperage of the fuse, you first need to know the full-load steady-state current of the circuit at an ambient temperature of 25º C (68º F). Once the current value is determined, then a fuse rating should be selected as to be 135% of this value (taken to the next standard value).

How do I know what fuse to use?

The simple calculation is watts divided by volts equals amps. After you have calculated this, it is a simple case of adding around 10% to the value and choosing the nearest fuse to match. This is a more precise method then just guessing should you require a 3, 5, or even 13 amp fuse.

### What type of fuse do I need?

Plugs for appliances rated between about 700 watts and 3000 watts (the maximum rating of a wall socket) should be fitted with a 13-amp fuse (coloured brown). For example: 13A Fuse – Washing machine, dishwasher, microwave, kettle, toaster, iron.

### Which is the correct fuse for 125v or 250V?

125V or 250V should both work as long as the required fuse is rated 125V. AS long as you do not go below 125V, you are OK. The current should be 3.15A.

Do you need a 3.15a or 3A fuse?

However, if the receiver really draws 3A and the safety margin of the fuse is only 0.15A, then, the 3A fuse would not work and you would need a 3.15A fuse. But, I highly doubt that. So, in short, I think that a 3A fuse should have worked.

## What’s the difference between a 15 and 20 amp circuit?

A 15-amp circuit is usually served by 14-gauge wire and is protected by a 15-amp circuit breaker or fuse. A 20-amp circuit, protected by a 20-amp breaker or fuse, must be served by 12-gauge or 10-gauge wire. Tip: The easiest way to determine whether a circuit is 15 or 20 amps is to look at the corresponding breaker or fuse in the breaker panel.

## What is the voltage of a Sony fuse?

Also, the fuse itself (the one that blew originally — no pun intended) has 3.15A-125V inscribed onto the metal connections. The sony receiver probably isn’t under warranty anymore since it’s been almost 5 years since it blew.