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: 02.07.2025 23:48

So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
A circuit breaker is similar, but is resettable.
This one hit behind the barn.
The bolt then partially travels down the line to your home.
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
3 Observations: Running Against the Wind; Isaiah Rodgers Nabs Interception - Minnesota Vikings
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.
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.
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.
There Is A Very Particular Reason Why Baboons Travel In Straight Lines - IFLScience
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.”
but I think this circuit , shows a few more pieces.
Eligendi molestiae corrupti numquam voluptatum doloremque laudantium eum.
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?
The third is lightning and “how it gets conducted into a home.”
but this device (an Inductor) … impedes the rapid changes in the current.
What is it like to experience sleep paralysis?
Because the load is inductive, the current lags the voltage.(by a bit).
But… the neutral is now “floating” because of the 1 ohm resistance.
Barnstars:
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
A fuse is a non-resetable over current circuit protector.
what exactly is a ‘surge’ protector?
If white people had been slaves, would WLM be a thing right now?
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
First Sentence:
So, the voltage could go up to 500 volts, and the fuse will not open up.
See a vivid green fireball light up the northeastern US (video) - Space
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.
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
Now when you have a certain ac resistance, then a current flows in a loop.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
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.
Water Discovered Around a Young, Sun-Like Star For First Time - ScienceAlert
2024–10–10[John johnson John Johnson ]
It seems Mohan does not understand the difference between a comment and an Answer.
I post the exact comment here.
What Happens to Your Blood Pressure When You Drink Energy Drinks Every Day? - Verywell Health
This is where this question deviates from being a 'generic' question, and becomes more specific.
the problem then depends on "how fast does the fuse operate?".
These are simplified answers to the original question, and does not change anything I wrote above.
Crypto Firm Tron, Led By ‘Top Fan’ Of Trump, To Go Public Through Reverse Merger - Barron's
so, what happens?
This device then solves the entire problem.
Upvotes:
In schematic diagrams this is the symbol for a fuse:
At least they know the answer if they wanted it.
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
Rafael Devers Made Worst Announcement For Red Sox Fans - Sports Illustrated
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
nine
“ 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”
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.
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
One is “what exactly is in a ‘surge protector’ ? ”
There are three different concepts here that are getting confused.
He then describes Rainy Season and Lightning.
2024–10–14 [Omar Gharbi Omar Gharbi ]
At one ohm, the resistor has a maximum of 1 watt power.
There are two important concepts here.
2024–10–16 [ OO OLAOYE OYEBODE ]
For this case there are devices called Metal oxide varistors (MOV).
One
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
Can the fuse protect the electronic devices from lightning instead of a surge protector.
An AC voltage/ current source, and an ac inductive load.
These devices are installed between the “hot” and “neutral” and protective ground.
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
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.
But it can get overloaded, and no longer works.
Here is a simplified AC power diagram.
He then asserts :
a photo is worth a thousand words.
This is where the MOV conducts again, and dissipated the energy.
What is lightning?
He then describes the function of a fuse.
This is the picture of an electronic coil of wire wound around a core of magnetic material.
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
This is 'the assistant's answer'
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
(Dc diagram shown, AC is similar).
What does a fuse do?
[old diagram got deleted by accident]
Edit 2024–10.
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
It also is a device that limits the change in current flow.
The other is “what does a “fuse” do?”
eight
[image of Common-mode choke]
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.