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: 22.06.2025 01:09

So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
Barnstars:
“ 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”
Do narcissists love their children?
a photo is worth a thousand words.
There are three different concepts here that are getting confused.
Edit 2024–10.
What 10 things have you stopped doing in your life?
One
At least they know the answer if they wanted it.
what exactly is a ‘surge’ protector?
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
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?
What does a fuse do?
A circuit breaker is similar, but is resettable.
Sloths The Size of Elephants Roamed America, Before Abruptly Vanishing - ScienceAlert
The third is lightning and “how it gets conducted into a home.”
2024–10–10[John johnson John Johnson ]
This is where the MOV conducts again, and dissipated the energy.
Mia Goth Joins Shawn Levy’s ‘Star Wars: Starfighter’ Alongside Ryan Gosling - Variety
In schematic diagrams this is the symbol for a fuse:
(Dc diagram shown, AC is similar).
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
Because the load is inductive, the current lags the voltage.(by a bit).
But it can get overloaded, and no longer works.
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
This 1 Kitchen Tool Can Help You Cut Back On Oil & Calories, Dietitian Says - TODAY.com
There are two important concepts here.
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
but I think this circuit , shows a few more pieces.
Which job has the potential to become rich easily?
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
The bolt then partially travels down the line to your home.
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.
Make-A-Wish helps Tacoma cancer patient fulfill dream of giving back to fellow children - KOMO
He then describes the function of a fuse.
One is “what exactly is in a ‘surge protector’ ? ”
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.
This Week In Space podcast: Episode 163 — The Trials of Starship - Space
So, the voltage could go up to 500 volts, and the fuse will not open up.
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
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.
What do you do when you are struggling to fall asleep?
A fuse is a non-resetable over current circuit protector.
It also is a device that limits the change in current flow.
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.
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
First Sentence:
Here is a simplified AC power diagram.
Alex Cora Takes Blame for Red Sox Woes After Extra Innings Loss - Sports Illustrated
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
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.
nine
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
It seems Mohan does not understand the difference between a comment and an Answer.
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.
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?
At one ohm, the resistor has a maximum of 1 watt power.
These devices are installed between the “hot” and “neutral” and protective ground.
eight
[old diagram got deleted by accident]
[image of Common-mode choke]
This is 'the assistant's answer'
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.
the problem then depends on "how fast does the fuse operate?".
He then asserts :
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
This is the picture of an electronic coil of wire wound around a core of magnetic material.
The MOV will conduct when the voltage exceeds 50% of line voltage.
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
For this case there are devices called Metal oxide varistors (MOV).
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
2024–10–16 [ OO OLAOYE OYEBODE ]
Now when you have a certain ac resistance, then a current flows in a loop.
The other is “what does a “fuse” do?”
These are simplified answers to the original question, and does not change anything I wrote above.
so, what happens?
An AC voltage/ current source, and an ac inductive load.
I post the exact comment here.
This is where this question deviates from being a 'generic' question, and becomes more specific.
This one hit behind the barn.
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
Upvotes:
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
but this device (an Inductor) … impedes the rapid changes in the current.
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
Can the fuse protect the electronic devices from lightning instead of a surge protector.
But… the neutral is now “floating” because of the 1 ohm resistance.
2024–10–14 [Omar Gharbi Omar Gharbi ]
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
He then describes Rainy Season and Lightning.