What exactly is the difference between a surge protector and a fuse? Can a fuse protect the electronic devices from lightning instead of surge protector?
Last Updated: 17.06.2025 04:40

There is no harm in having the surge suppressor along with the fuse in the circuit. The fuse will not open up until the current melts the link. This will take time, and in the interim, that jolt will get transmitted into the power supplies.
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
This is a high voltage low current spike that comes down the line because of the power poles being struck, and the voltage suppressors activating on the primary side of the transformer.
Why do I feel so lazy every time I get into my room?
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
2024–10–14 [Omar Gharbi Omar Gharbi ]
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
What was your best revenge story?
These are simplified answers to the original question, and does not change anything I wrote above.
At one ohm, the resistor has a maximum of 1 watt power.
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
This device then solves the entire problem.
eight
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
Why are so many young teenage boys misogynistic? Where do they get these attitudes from?
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
There are three different concepts here that are getting confused.
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
Why do Democrats never produce a good argument for why Trump was a bad president?
Now when you have a certain ac resistance, then a current flows in a loop.
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
This is where this question deviates from being a 'generic' question, and becomes more specific.
Would you raise your children like your parents raised you?
It also is a device that limits the change in current flow.
The bolt then partially travels down the line to your home.
The third is lightning and “how it gets conducted into a home.”
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
This one hit behind the barn.
Lightning arrestor is a spark-gap device, and can be installed anywhere. What is important, is that the wire is thick enough to withstand the lightning bolt and conduct the energy away from the building.
What are you struggling with in your life? What would you like to have instead?
First Sentence:
But it can get overloaded, and no longer works.
Can the fuse protect the electronic devices from lightning instead of a surge protector.
The other is “what does a “fuse” do?”
There are two important concepts here.
He then asserts :
Why is that Hag Hillary Clinton so quiet these days? She is the dog that isn't barking
2024–09–27 [ Mohan Rajaratnam Mohan Rajaratnam ] . Thinks you can get free electricity from nothing : Mohan Rajaratnam's answer to Is it possible to generate free electricity at home using a magnet or other low-cost methods? If so, how does it work?
He then describes the function of a fuse.
A circuit breaker is similar, but is resettable.
What is your daily motivation and does it work?
But… the neutral is now “floating” because of the 1 ohm resistance.
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
[old diagram got deleted by accident]
The sun's poles have flipped. A spacecraft is watching what happens next. - Mashable
One is “what exactly is in a ‘surge protector’ ? ”
An AC voltage/ current source, and an ac inductive load.
It seems Mohan does not understand the difference between a comment and an Answer.
Do Flat Earthers exist today? If so, where do they live?
He then describes Rainy Season and Lightning.
So, the voltage could go up to 500 volts, and the fuse will not open up.
What does a fuse do?
Can I see some saggy tit pics and huge areolas pics?
In schematic diagrams this is the symbol for a fuse:
This is where the MOV conducts again, and dissipated the energy.
“ A surge suppressor is the one which is connected at the input supply so that when there is a sudden change voltage it bypasses thereby protecting the (circuit) and electronic components”
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
The MOV will conduct when the voltage exceeds 50% of line voltage.
nine
what exactly is a ‘surge’ protector?
(Dc diagram shown, AC is similar).
but I think this circuit , shows a few more pieces.
Once the voltage goes over 0.0650 volts, then this fact can be used to amplify the difference, and turn the circuit breaker off , furthur down the line. Essentially that is what a RCD/GFCI does, it compares the incoming current, to the outgoing current, and if the difference between the two currents is over 5mA, then it trips the circuit breaker.
2024–10–10[John johnson John Johnson ]
Upvotes:
Edit 2024–10.
This is 'the assistant's answer'
For this case there are devices called Metal oxide varistors (MOV).
so, what happens?
[image of Common-mode choke]
the problem then depends on "how fast does the fuse operate?".
Barnstars:
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
This is the picture of an electronic coil of wire wound around a core of magnetic material.
but this device (an Inductor) … impedes the rapid changes in the current.
These devices are installed between the “hot” and “neutral” and protective ground.
This is an electronic circuit designed to clamp voltages so that the Voltage Potential that appears at the outlet is never going to exceed the nominal value.
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
a photo is worth a thousand words.
I post the exact comment here.
This is a photo where a lightning bolt took out a home's complete mains distribution box, and a lot of electronic gear as well.
What is lightning?
At the secondary, it is 1000 times less.)turns ratio). If it gets hit with a 100,000 volt bolt of lightning then the voltage arrestors conduct and clamp the voltage down to line voltage, ( but a small amount leaks down the line). This is the problem.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
At least they know the answer if they wanted it.
A fuse is a non-resetable over current circuit protector.
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
Here is a simplified AC power diagram.
One
Because the load is inductive, the current lags the voltage.(by a bit).
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
2024–10–16 [ OO OLAOYE OYEBODE ]