Questions regarding physical fuses. Fuses are a safety device consisting of a strip of wire that melts and breaks an electric circuit if the current exceeds a safe level. PPTC, PTC, and Polyfuse questions should use the Polyfuse Tag. Please keep in mind that repair questions are typically closed if ...

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2answers
743 views

Appropriate fuse for 12V battery - solar power controller connection

I'm a biologist tracking migratory bats and need to build a bunch of antenna towers to listen for pulses from tagged bats flying nearby. These are off-grid, so we'll have 55W solar panels charging ...
5
votes
6answers
2k views

Is it possible to quantify electric power consumption on a fuse?

If you have a common fuse is there way quantify the power consumption which is flowing through this fuse. Or could you replace the fuse with something that measures the power consumption but still ...
3
votes
3answers
319 views

Fuse: why does it connect in parrallel with resistor?

I have a wire in normal condition runs 4A. The device I am using is auto-transformer, and its data sheet recommend to use fuse of 10A. So I went to buy the 10A fuse, and mount it onto a fuse holder. ...
3
votes
2answers
7k views

What does 3AG mean in “Fuse Block 3AG”?

I have read from a vendor website. It mentions 3AG fuse block. What does 3AG mean?
0
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1answer
41 views

Does a lamp need a fuse?

I have a floor lamp in which I have installed 2 LIFX Color 1000 A19 Wi-Fi LED Smart Bulbs (http://www.lifx.com/products/color-1000) The lamp is designed to have 2 bulbs and has a two position dimmer ...
1
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3answers
45 views

The use of fuses in small electronics projects

I am new to electronics so I hope this question is acceptable. I have been playing around with an Arduino. I have use the USB output from a computer as a power source. I also have a 9V battery. I am a ...
5
votes
5answers
9k views

what size of copper wire can act as a 150A fuse?

If I would like to use a piece of copper wire as a 150A fuse, what size of wire should I use? It doesn't have to be 150A very accurately, the parameters I need the wire to meet are: it needs to ...
15
votes
6answers
96k views

Slow Blow vs Fast Acting Fuse

Is there any way to tell the difference between a slow blow and a fast acting Fuse? I had one blow in my amp and I know its 125v 5a, but i'm not sure if it is a slow blow or fast acting fuse. Is ...
3
votes
3answers
674 views

Filtering Capacitors before the fuse or after the fuse while limiting inrush current?

There are basically two questions I have for this circuit. 1) Which capacitor configuration is good? before fuse or after fuse 2) How do I limit my inrush current? My thoughts: I am confused ...
8
votes
5answers
57k views

Why does fuse blow up sometimes?

Sometimes once in a year, either one of main fuses or a fuse in room blow up due to something. What is the cause of this? Why do we even use fuses? Is it because the voltage doesn't stay at 220V all ...
0
votes
1answer
34 views

What holder for a 3,6x10mm fuse? [closed]

How would one mount a fuse that is 3,6mm in diameter and 10mm in length on a PCB? I can't seem to find a method to do this, browsing through the electronic components suppliers. Datasheet: ...
9
votes
3answers
15k views

How to check if my multimeter's fuse is damaged?

I recently bought a cheap multimeter. I played around measuring stuff on simple circuits and I think I managed to damage it as I don't seem to be able to measure current anymore (always get zero ...
2
votes
2answers
79 views

How “slow” is a Class T “slow blow” fuse?

I have a DC inverter that's rated for 3kw sustained with a 6kw peak (for up to 5 seconds). Per the Inverter manual, the manufacturer recommends a battery fuse rated for "at least 350 amps". How can ...
1
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3answers
45 views

Does the rating of an AC fuse point to the amplitude or rms value of the current?

If one reads 16A on an household fuse. Does that mean that fuse can handle up to 16 ampere rms or 16A amplitude?
0
votes
1answer
51 views

Glass fuse - Selection rule

If I have a circuit which have current consumption 100mA, what is the value of the fuse that I have to select so to open (burn) the fuse in the case of a short circuit? There is a theoretical or ...
0
votes
2answers
47 views

Diazed fuse heat dissipation

To be more precise, I'm interested in the amount of "created" heat during normal operation from a diazed 16 ampere fuse. How hot will the fuse be after delivered 16A in seven hours with the voltage ...
3
votes
1answer
447 views

What are the technical specifications of Tesla “cell level fuses” one fuse per cell

How do Telsa cell level fuses work? Can they protect against short circuits and internal cell fusing? How is the current distributed throughout so many fuses? A total of 200 amps could pass through ...
3
votes
1answer
114 views

Using Fuses to Connect Batteries in Series

I would like to create this battery pack, consisting of 13 Samsung ICR18650-26F connected in series. There are balancing leads for balanced charging, and resettable polyfuses connecting all of the ...
0
votes
3answers
29 views

Using thermal overload protection in AC-DC PWM motor driver circut

i'm having some difficulties with calculating the value of the thermal overload fuse in this circuit. The thermal fuse is used to protect the motor and the circuit behind it. The deal problem is that ...
0
votes
1answer
30 views

Fuse Question and Surge Protectors

I am doing a DIY PDU project for my college using an Arudino and I have 8 16Amp relays that are controlled via the board. I want to make some sort of surge protector for it as well. Basically I want ...
1
vote
1answer
69 views

What type of fuse should I use for this basic electronics design?

I'm creating a simple Arduino project that utilizes a solenoid and a rotary encoder. I'm powering the entire device with a 12V 5A switching power supply. I want to add a fuse to the design but can't ...
0
votes
1answer
62 views

Amperage before and after rectification

I recently received a variac variable ac transformer. It is a older model so I decided to modify it a bit. I will add analogue amp and volt meters to show what the "current" out put is(pardon the pun) ...
4
votes
1answer
71 views

What component has the reference designator RY?

I found a component designated RY8015 which I don't recognize, shown on the photo below on an LCD TV PCB (the bulb-like part next to a green radial varistor). What is it called? What is its design ...
0
votes
1answer
47 views

Fuse and fuse holder

Intro I am currently working on an e-board. my esc is a vesc, which has the following ratings: Voltage: 8V – 60V (Safe for 3S to 12S LiPo). Current: Up to 240A for a couple of seconds or about 50A ...
0
votes
1answer
51 views

would i need a fuse when experimenting with transformers?

I have a 0.7A center tapped 12v/15v transformer(i dont know details about it). However i dont know which pin is which among the output pins, so I have to jump them in many ways and measure with ...
0
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3answers
65 views

What fuses for 100A, 3-ph disconnects

I've been looking at 3 phase disconnects, and I'm uncertain what the rated amperage means in this context. Since each blade (phase) has its own fuse in a fusable disconnect, does that mean that for a ...
1
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4answers
134 views

Benchtop circuit breaker

I repair electric appliances and tools. Every once in a while, the main circuit breaker trips when I plug in a device. I don't want to prevent a circuit breaker from doing its job, but I would prefer ...
1
vote
2answers
97 views

Cannot enter programming mode ATMega328p

I'm using an ATMega328p Xplained Mini development board. I was able to program it using Atmel Studio 7, being new to AVR programming I accidentally set the RSTDISBL fuse to 0 (has a default value of ...
6
votes
8answers
1k views

Can I use a 10A light switch with an appliance with a 13A fuse?

I have a vacuum cleaner, which I wish to add a switch to, so that I can leave it plugged in all the time and use the switch to turn it on and off. The vacuum cleaner has a fuse rated 13 Amps. I ...
3
votes
1answer
63 views

What fuses can I use for branch circuit protection above 600 amps?

My present understanding is that not just any fuse meets the paperwork qualifications of "branch circuit protection". In particular, I want to protect a variable frequency drive, so J-type fuses are ...
-3
votes
1answer
73 views

what fuse for an electric circuit tester

Cannot seem to get a clear answer on the web. I have a mains tester with a blown 100mA fuse (glass) do I replace it with a quick blow fuse or a time delay fuse. Common sense would say a quick blow ...
-1
votes
5answers
139 views

Preventing breaking of fuse wire very frequently [closed]

we have two geysers 3kWh each. When we turn on both the geysers, the fuse wire breaks. This happen s quite often and in the same scenario. How to prevent this from happening keeping both the geysers ...
3
votes
5answers
349 views

Why don't DC PSUs need a fuse?

This feels like a silly question, but after taking apart some of our 6W 12V DC power supplies I've noticed that none of them are fused. Out of curiosity more than anything else, I'm wondering why a ...
0
votes
1answer
57 views

Can you identify this fuse?

Sorry, dumb one really. I just had the heating out for a couple of days and eventually found a fuse blown in a controller for the (LK) underfloor heating. I can't tell what rating it has (amps). It ...
16
votes
4answers
4k views

Why did my fuse blow after 3+ years of no problems?

For several years, I have had a solenoid wired to the 24VDC output of a PLC (Rockewell Automation 1769-OB16). To protect the PLC output card, a fast-acting 500mA fuse was installed between the PLC ...
0
votes
2answers
298 views

Where to put the Fuse in a circuit

I have circuit where the input can be 12-48V AC or DC. This is fed to a bridge rectifier. I plan to put a fuse and got a bit confused, what is the best place to put a fuse? before the bridge ...
1
vote
1answer
911 views

Not sure how to replace a blown fuse in a building's fuse box

One of our fuses in our secondary fuse box just blew. Luckily, there there is a backup. I am not an electrical professional but I know a little 101. I just want to ask about the correct fuse / amps ...
0
votes
1answer
62 views

Glass fuse identification - Siran No. F 13 4A

We have a glass fuse for a 12v lighting circuit that has "Siran No. F 13 4A" written on paper inside it. The circuit takes 5.5A at the moment with all the lights switched on without the fuse blowing. ...
5
votes
1answer
240 views

Why can't I blow a fuse?

In the book I am reading, there is an experiment that consists of connecting an automotive style fuse and a 1.5V battery to observe blowing of a fuse. However my fuse does not blow. I have repeated ...
0
votes
4answers
1k views

Why is this switched power inlet fused on both load and neutral sides?

I've purchased a Schurter 4304.6090 power inlet for a project and am a bit confused by the fuse configuration. The inlet requires two fuses: one on the load side and another on the neutral side of the ...
0
votes
1answer
53 views

Using AC fuse for DC & DC fuse for AC…!

Recently I visited a site where I saw that in an inverter AC fuse are use for DC..it is quit odd for me..!!! Is it ok to use the same? What are the factors to be considered when we use AC fuse in DC ...
0
votes
1answer
84 views

Electronic fuse

I teach electrochemistry to students in chemistry. During each class, there is at least one student that manages to burn the 200mA fuse of our $15 multimeters. It's quite annoying. I am thinking of ...
1
vote
3answers
333 views

Where/How should I fuse this transformer?

Background: I have a step-down transformer P241-5-36, which is a single mains primary coil to 36V Center Tapped (18-0-18) secondary. I would like to use this transformer to build a linear regulated ...
2
votes
2answers
69 views

spec of a fuse holder

While searching for fuse holders in the web, I found an infinity of pages like this, where the rating of the fuse holder is e.g.: "10A/250V AC, 15A/125V AC" (it is an example, values do not matter). ...
1
vote
1answer
51 views

How to verify fuse ampere rating

Is there any method to verify the fuse ampere rating without destructing it .I know the fuses works on the principle of resistive heating .If there is any method to verify the ampere rating without ...
1
vote
2answers
258 views

How can I make a Fuse Blown Indication LED circuit with variable voltage input?

I'm creating a power supply with an input fuse and and output fuse, and I'd like to have blown fuse indicators. However, the circuits I have found typically have set voltages and thus set resistors, ...
26
votes
4answers
2k views

Can thin sections of copper traces be used as fuses?

Is it safe to use thin sections of copper traces as one-shot fuses when cost is important, but when it is also vital to protect the rest of the circuitry? Should the solder mask be removed at that ...
1
vote
0answers
64 views

Is a Zener and a fuse enough protection?

We have a power chain that runs from an alternator, to a 24->12 dc regulator, to a battery charging circuit, to a 12 v battery. We were thinking of using this circuit minus the ac-dc converter part ...
0
votes
1answer
156 views

Directional audiophile fuses

There are some "audiophile fuses" in the market, and the manufacturers claim that they are directional. Here are some examples: HiFi-Tuning Isoclean Here is a quote from a fuse review (yep...): ...
3
votes
2answers
446 views

Current Determination - 12V to 5V (USB Output)

I am attempting to determine the current in an automotive installation of a 12V to 5V converter that will supply a USB output. Max output on the 5V side will be 3 Amps. ...