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?
16.06.2025 06:16

Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
So, the voltage could go up to 500 volts, and the fuse will not open up.
At least they know the answer if they wanted it.
macOS Tahoe's New Theming System Explained - MacRumors
He then asserts :
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
In schematic diagrams this is the symbol for a fuse:
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?
It also is a device that limits the change in current flow.
Because the load is inductive, the current lags the voltage.(by a bit).
How was your JEE Advanced 2024 result?
I post the exact comment here.
2024–10–10[John johnson John Johnson ]
The MOV will conduct when the voltage exceeds 50% of line voltage.
Retailers Seen Using Stablecoins to Push Back Against Card Fees - Bloomberg
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.
At one ohm, the resistor has a maximum of 1 watt power.
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
nine
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
This is where the MOV conducts again, and dissipated the energy.
Kellen Moore: I like where our quarterbacks are heading - NBC Sports
For this case there are devices called Metal oxide varistors (MOV).
Can the fuse protect the electronic devices from lightning instead of a surge protector.
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 is your secret to glowing skin?
Now when you have a certain ac resistance, then a current flows in a loop.
This one hit behind the barn.
so, what happens?
How do I overcome attachment issues?
This is the picture of an electronic coil of wire wound around a core of magnetic material.
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.
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
What's your photograph of the day 1097?
First Sentence:
what exactly is a ‘surge’ protector?
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
It seems Mohan does not understand the difference between a comment and an Answer.
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
2024–10–16 [ OO OLAOYE OYEBODE ]
Do you think Japan will have same-sex marriage by 2030?
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
This device then solves the entire problem.
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
These devices are installed between the “hot” and “neutral” and protective ground.
(Dc diagram shown, AC is similar).
[image of Common-mode choke]
What makes females believe or think abortions are part of a woman’s rights?
What is lightning?
These are simplified answers to the original question, and does not change anything I wrote above.
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
If Trump were to lose in 2024, would that be the end of his grip on the Republican Party?
There are three different concepts here that are getting confused.
Edit 2024–10.
Here is a simplified AC power diagram.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
The bolt then partially travels down the line to your home.
but I think this circuit , shows a few more pieces.
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.
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.
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.
What does a fuse do?
But… the neutral is now “floating” because of the 1 ohm resistance.
A circuit breaker is similar, but is resettable.
but this device (an Inductor) … impedes the rapid changes in the current.
He then describes the function of a fuse.
Barnstars:
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
But it can get overloaded, and no longer works.
a photo is worth a thousand words.
The other is “what does a “fuse” do?”
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
One
This is 'the assistant's answer'
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
One is “what exactly is in a ‘surge protector’ ? ”
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.
This is where this question deviates from being a 'generic' question, and becomes more specific.
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.
A fuse is a non-resetable over current circuit protector.
He then describes Rainy Season and Lightning.
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
the problem then depends on "how fast does the fuse operate?".
[old diagram got deleted by accident]
There are two important concepts here.
eight
2024–10–14 [Omar Gharbi Omar Gharbi ]
“ 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”
An AC voltage/ current source, and an ac inductive load.
Upvotes:
The third is lightning and “how it gets conducted into a home.”