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: 28.06.2025 14:28

There are two important concepts here.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
An AC voltage/ current source, and an ac inductive load.
OpenAI claims to have hit $10B in annual revenue - TechCrunch
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
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.
eight
What are the top challenges facing FinTech HR firms?
the problem then depends on "how fast does the fuse operate?".
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.
These are simplified answers to the original question, and does not change anything I wrote above.
In the Belly of This Beast, a Major Find - Newser
A fuse is a non-resetable over current circuit protector.
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
Here is a simplified AC power diagram.
Summer McIntosh Posts 4:23.65 400 IM to Break Her Own World Record - SwimSwam
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
Mario Kart World is the perfect Switch 2 launch game - The Verge
“ 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”
The other is “what does a “fuse” do?”
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?
Persona 4 Revival Officially Revealed At Xbox Games Showcase - GameSpot
He then describes the function of a fuse.
[image of Common-mode choke]
Barnstars:
What’s up in the sky for June 2025? Arietid meteor shower, strawberry moon and much more - WTOP
But… the neutral is now “floating” because of the 1 ohm resistance.
At least they know the answer if they wanted it.
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.
How do you get a girl to like you?
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
so, what happens?
The MOV will conduct when the voltage exceeds 50% of line voltage.
New Pluto-Like Planet Discovered In Solar System — What To Know - Forbes
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
what exactly is a ‘surge’ protector?
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.
If you were a writer for HBO, how would you rewrite the final season of Game of Thrones?
He then asserts :
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
Judge rejects Newsom’s emergency request to limit Trump LA troop deployment - The Hill
Upvotes:
2024–10–16 [ OO OLAOYE OYEBODE ]
This is where the MOV conducts again, and dissipated the energy.
Which diploma is best for a job?
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.
Can the fuse protect the electronic devices from lightning instead of a surge protector.
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
What is lightning?
This is the picture of an electronic coil of wire wound around a core of magnetic material.
Why did Britain steal Gibraltar from Spain?
So, the voltage could go up to 500 volts, and the fuse will not open up.
These devices are installed between the “hot” and “neutral” and protective ground.
A circuit breaker is similar, but is resettable.
Edit 2024–10.
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
There are three different concepts here that are getting confused.
One
The third is lightning and “how it gets conducted into a home.”
What does a fuse do?
It seems Mohan does not understand the difference between a comment and an Answer.
For this case there are devices called Metal oxide varistors (MOV).
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
Because the load is inductive, the current lags the voltage.(by a bit).
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
In schematic diagrams this is the symbol for a fuse:
[old diagram got deleted by accident]
but I think this circuit , shows a few more pieces.
It also is a device that limits the change in current flow.
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
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.
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
nine
But it can get overloaded, and no longer works.
This one hit behind the barn.
a photo is worth a thousand words.
First Sentence:
This is where this question deviates from being a 'generic' question, and becomes more specific.
2024–10–14 [Omar Gharbi Omar Gharbi ]
2024–10–10[John johnson John Johnson ]
At one ohm, the resistor has a maximum of 1 watt power.
The bolt then partially travels down the line to your home.
I post the exact comment here.
(Dc diagram shown, AC is similar).
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
but this device (an Inductor) … impedes the rapid changes in the current.
Now when you have a certain ac resistance, then a current flows in a loop.
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.
This is 'the assistant's answer'
This device then solves the entire problem.
He then describes Rainy Season and Lightning.
One is “what exactly is in a ‘surge protector’ ? ”