wonderful!! i love knowing how things like this work! I just replaced one in my air fryer! so many people act like i am crazy for wanting to know how something does it job! i really appreciate this!
Again two thumbs up for a VERY clear and concise video. I have repaired a shop vac and a $150 NuWave Oven for less than $2 each. The NuWave oven had multiple thermal fuses and I had to go deep into the belly of the beast to find the bad one. Yes amazing how many devices get trashed due to such an inexpensive device.
Thanks. Everything I needed to know. Very well presented, your close ups of comoponents and your detailed explanation of the internal operation of the thermal-fuse was top notch! Now, back to my waffle iron which had the open circuit at the thermal fuse.
Very cool video. I have been working around these little thermal fuses for most my life and always figured there was just a type of soft soldier inside connecting the to leads. When it gets hot, I figured it melted, braking the connection. Now I know the actual truth. Thumbs up bro. Cheers
The square ones do use solder. It's just two wires connected with alloy with a low melting temp. The packing absorbs the liquid metal. It's sad they use this, I have a old early 80s maybe late 70s fan heater. It has a thermal switch you can reset simply by pushing it back once cool. I know the thermal fuses cost literally pennies but I'd much rather pay a bit for a reset switch. It's actually very wasteful and greedy
My new cheap "Mr Coffee" just blew one. Looks like they put 2 of these in series on the line. My thought is: There are two for additional safety. While I wait for the replacement I purchased online, I slipped a piece of mini brass tubing I have and crimped the ends onto the existing wire leads (After cutting out the blown fuse). Mr C works just fine for now. Thanks for the analysis. Amazing how small they can make a fuse for 120V usage.
This is a great vid. Who'd think such a tiny part could be so cleverly engineered. And like what was said earlier, by Tbone, people have no idea they are even there. The first time I ever saw one was yesterday when I disassembled a 1980s or 1990s Japanese made wall wart, (for some Ericsson appliance). It was indeed, buried in the heart of a beautifully constructed transformer. When I saw your vid, I just had to watch. Thanks!
Another interesting video of something that not much is known about. I didnt know how the temperature could be rated accurately. Thank you for cutting one apart. There is another electronic item which is not well understood. It is a problem and maybe you have done a video or plan one, it is how to repair wire ribbons that dont have copper wire but some form of powered metal between two plastic sheets. I have encountered this several times and can not find a repair method that works to rejoin a severed connection. Thank you again for the video.
Don't forget about black and decker blenders. I know this for a fact after fixing some of them despite back and decker telling me it should reset after a few minutes of cool down. Not what I saw when I opened it up, it was not a resettable thermal fuse.
Very nice video. The temperature briefly shown in this video commonly found in your refrigerator and microwave oven uses a bi-metallic strip similar to what is found in a mechanical circuit breaker. When the metal gets hot or cold it bends opening or closing the circuit.
Thanks. My Hedge Trimmer keeps cutting out and won't restart until completely cooled. I stripped it down, regreased etc. but I can see at least 2 components which might be a thermal switch and a fuse - tempted to just buy a new trimmer?
I remember the first time I encountered one of these in a slide projector lamp supply wiring. I thought the lamp had burned out, double disappointment. Thanks for the take apart, sort of a non resetting thermostat
Adding to what has already been said by many.....great video, thank you for the useful information. I was wondering if it made any difference in which direction the fuse should be installed. My coffee maker went dead and I did check the fuse and it was the culprit. I ordered one through amazon. The only thing I failed to pay attention to was the direction the fuse was facing when I cut it out of the circuit. I assumed it doesn't make a difference as current can travel in either direction through a fuse.
Glad you enjoyed my video Dan! I have many videos that cover a wide range of subjects, so be sure to look over my video playlists below, and most importantly share. Thank you ruclips.net/user/electronicsnmoreplaylists
The manufacturers like these because they hide them easily and most devices get thrown away and a new purchase is coming! It would be much more consumer friendly to use circuit beakers and/or other visible fuses. My opinion.
My Philips fan heater from the early 80s has a thermal switch. There are clear instructions how to reset if the item overheats. Which happened only twice. I've seen new fans which omit this little feature.
@@Gunzee are you sure it doesnt also have a thermal fuse, rated for a higher temperature, as a backup? Sometimes they have that in case the thermal switch ever doesnt open for some weird reason. It's possible for them to stick closed (less likely than the contacts breaking causing a permanent open condition)
Hi ,i have a fruit liqudaizer and the motor stops working , i manage to open the bottom cover and found the ceramic fuse attached to the circuit board blown as according to my testing , but i cann,t get the acctual type of replacement , can i use this type of thermal fuse , if can what is the rating i should replace it and at what value volts ,, due most are 220v and my machine is 600w... can any any one help ...tks
@@sammy2888 check ebay or amazon, banggood or other places. Ceramic thermal fuses exist. (and neglecting to correct spelling and grammar reveals something else).
Glad you liked the video! Be sure to share the video link with others, and look over my extensive video playlists for many other videos of interest to you and share. Thanks
I am very new to electronics (only as a hobby, not my profession). Questions: 1) why is one end of the fuse shorter then another? 2) is it important how you connect it - "which way" should the "sharper" end face? 3) I would like to blow it that I connect some 9V battery to an LED via a resistor with having this fuse in the circuit. Using a lighter I would heat it up above 94*C. Any precautions maybe? I would probably use alligator clips for connecting the fuse to the linear circuit or maybe just some copper wire because I fear the clips will also overheat and maybe melt the rubber part. Fuse type: SEFUSE, sf90r0, 94*C, 15A
Thanks for watching! Please share my channel with others, and look over my extensive video playlists below for many other videos of interest to you. ruclips.net/user/electronicsnmoreplaylists
It is a very informative video showing how the thermal fuse works. Thank you. I have a question: There are always two ratings for a thermal fuse. e.g: 115 degree 2A @ 250V. Does this mean, the fuse will blow EITHER the temperature exceeds 115 Degree or the current exceeds 2A? It is not that both conditions must be present before the fuse blows right? If I may use the Basic Logic Gate, it is a OR gate and not AND gate, right?
Thank you for your prompt reply. If this is the case then what is the purpose of specifying the voltage and current rating. Does this mean I can ignore all the other ratings and only look at the temperature rating if I need to replace a thermal fuse? Case in point. The thermal fuse of my standing fan blown out and it is rated at 115 Degree, 2 A @ 250V but I could not get a exact replacement and I bought one with a rating at 115 Degree but rated 10A @250V. It is safe to use this to replace the blown thermal fuse? I hope that you can advise.Thanking you in advance.
The thermal fuse may blow if EITHER the rated current OR temp is exceeded. Resistors and other current carrying components, including thermal fuses, may fail if their rated currents are exceeded. The manufacturer is informing the purchaser that the thermal fuse is rated to handle up to 2A at 250V which covers European, American and most other common household voltages. This 250V thermal fuse can be used safely on nominal 120V American household appliances and even nominal 240V appliances like dryers. However, regardless of the voltage of the circuit, the thermal fuse is only rated to carry 2A.
He ask about exceeding amp rating, not voltage. I once replaced a 150C 1A cut off fuse with a 10A 150c cause only one I had. But I also added a simple 1A fuse in line. Transformer is still working to this day. BTW accidently hooking up 600V to rated 220V thermal fuse may not be a good idea?@@electronicsNmore
I always wondered what's inside one of these. I know what can happen to a transformer without a thermal fuse, as I found out when I had a transformer wired up but didn't notice a couple of the taps on the primary were shorted together. Long story short, a lot of smoke and insulating wax came out.
Glad you enjoyed the video! I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others. Thank You
Very informative. One question, when installing a new fuse, which end of the fuse goes toward power source? In your example, does the red "cone" shaped end go toward power source? Does it matter?
Makes no difference. I have a very wide range of videos, so be sure to check them out below and share my channel. Thanks Scott! ruclips.net/user/electronicsnmoreplaylists
The thermal cutoff fuse may blow if EITHER its temperature OR rated current is exceeded. Say the manufacturer rates a thermal fuse at 220C 10A 250V. The thermal fuse will blow if it experiences a temperature greater than 220C, meaning a combination of the fuse's internal resistance heating and the ambient temperature it's being exposed to within the appliance. The thermal fuse may also blow if the continuous current it is carrying exceeds 10A, regardless of the voltage of the circuit it is part of. Resistors and other current carrying components, including thermal fuses, may fail if their rated currents are exceeded. The 250V indication means it's good for use in appliances connected to European, American and most other common household circuits. A 250V rated thermal fuse can be used safely in 120V American circuits and 230V European circuits. However, regardless of the voltage of the circuit, the thermal fuse in our example is rated to carry a continuous current no greater than 10A.
Correct, the fuse is rated to carry a certain amount of current, but if you go well above that rating, the fuse will heat up and cause the circuit to open as if an external high temp made it blow.
very nice video. You should mention that once the thermal fuse is overheated, it is blown and MUST be replaced. Not like a fuse that recovers when the temperature comes down. ALSO, notice the numbers on the fuse... go to a shop that sells these things and buy a new one. I paid about 5 euro (6 dollars?) for one and I think I paid too much?
Thanks for answering. Hey another question please. My thermal fuse was not my problem. But I noticed NO continuity through the double heating element AND over 300 volts going through everything, even though we have 240 volts from the wall outlet (Europe). What might cause this spike in voltage?
Glad you liked it! Be sure to check out my wide range of videos for many other helpful videos of interest to you, and most importantly share. Thanks ruclips.net/user/electronicsnmoreplaylists
Great video. Are they single use only, or do they "fix" themselves once the temperature is restored? If they are single use, are you aware of an alternative that would be multi use. I'm thinking of a thermal sensor for a li-ion battery to cut the power to the battery if the battery heats up due to over or under charge or bad polarity - hopefully stopping thermal runaway. But it would be great if the fuse was reusable. If maybe the problem was not with the battery or fuse but somewhere else in the circuit for example.
Put a thermal switch in series with a thermal fuse, where the switch temp rating is less than the fuse temp rating. The thermal switch alone will not prevent overheating damage. This is how coffeemakers are protected.
Glad you enjoyed it. :-) It's always nice to see viewer comments like yours, they offset the comments I get from Trolls and other undesirables. Thanks for watching!
does the Tapered side of the Thermal fuse have to be facing towards the incoming Power lines?! I have a Panini Grill with the Thermal Fuse fried! But I don't remember the orientation of the original install. Any suggestion would be appreciated.
I have a question! :) I have a two plate portable electric stove, or "hot plate" as they call them.. and the thermal fuse seems to be damage (bypassing it will turn on the plate) in my case, one plate es 1500 watts and the other smaller one is 500 watt and does NOT uses a thermal fuse, only the big one... now, since the thermostat know is working perfectly shutting down power when it reaches a certain temperature, could I bypass the thermal fuse?? I live in an island and electronic parts stores are closed (corona) thank you in advance
All depends on the battery chemistry. You need to match the rating to the blown fuse. Doesn't have to be exact, but very close. Look online for more info.
Using a Digital Multimeter(DMM), set the meter to continuity or measure resistance(Ohms). Touch the test probes to each side of the fuse, you should get a very low reading or an alarm should sound. Be sure to look over my video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others on social networking sites. Thanks Bob ruclips.net/user/electronicsnmoreplaylists
Is it matter direction of connect? I just changed thermal fuse for Ninja air fryer, after plug power is on but showing E1 and E3. do you have any idea? please let me know. Thanks!
For this particular diode, polarity does not matter but as a rule of thumb, try to have the point of the diode going in the direction of your current flow. This just gets you in that muscle memory reaction of always running your polarity in the right direction. Just something I was taught by a long time installer.
@@bigpop-popsmurf This isn't a diode at all. Also, beware installing with a soldering gun. A typical 300 C soldering gun tip can blow a 220 C thermal fuse quickly unless something is done to limit thermal heat transfer to the fuse. Manufacturers spot weld the thermal fuses very quickly and repairs are usually done with mechanically crimped butt joints.
I've seen appliances that have a resetting thermal switch, but just in case that ever doesn't open for some reason, which is less likely than contacts breaking, but it's still a realistic possibility that a reusable switch, could eventually have the contacts "weld" together from the arcs. So, to prevent a fire from starting, a thermal fuse could be included that's rated at a higher temp than the switch, to cut the power off in an emergency, just in case. Even if there was a fire and they did get sued, they could settle out of court for a smaller amount, by pointing out the safety features they included to prevent fires from starting.
what a stupid part... i was working on a shop and we were selling heaters. most of them could last for years but no, the fuses were blown so i had to take them of the circuit.
![[DRAGON BALL LEGENDS REVEALS ＆ STUFF] LEGENDS FESTIVAL 2024 Special Edition Part 1](http://i.ytimg.com/vi/mV5bGIswTtQ/mqdefault.jpg)
wonderful!! i love knowing how things like this work! I just replaced one in my air fryer! so many people act like i am crazy for wanting to know how something does it job! i really appreciate this!
Again two thumbs up for a VERY clear and concise video. I have repaired a shop vac and a $150 NuWave Oven for less than $2 each. The NuWave oven had multiple thermal fuses and I had to go deep into the belly of the beast to find the bad one. Yes amazing how many devices get trashed due to such an inexpensive device.
Great to hear
Never knew what was inside or understood the electrical design I’d it. Thank You very much for taking the time in making this great video!
Thanks. Everything I needed to know. Very well presented, your close ups of comoponents and your detailed explanation of the internal operation of the thermal-fuse was top notch! Now, back to my waffle iron which had the open circuit at the thermal fuse.
Glad you enjoyed it!
The amount of discarded appliances that could be fixed with a new thermal fuse must be enormous.
Very cool video. I have been working around these little thermal fuses for most my life and always figured there was just a type of soft soldier inside connecting the to leads. When it gets hot, I figured it melted, braking the connection. Now I know the actual truth. Thumbs up bro. Cheers
Glad you liked the video! Be sure to share my channel with others, and check out my video playlists as well. Thanks
The square ones do use solder. It's just two wires connected with alloy with a low melting temp. The packing absorbs the liquid metal.
It's sad they use this, I have a old early 80s maybe late 70s fan heater. It has a thermal switch you can reset simply by pushing it back once cool. I know the thermal fuses cost literally pennies but I'd much rather pay a bit for a reset switch. It's actually very wasteful and greedy
My new cheap "Mr Coffee" just blew one. Looks like they put 2 of these in series on the line. My thought is: There are two for additional safety. While I wait for the replacement I purchased online, I slipped a piece of mini brass tubing I have and crimped the ends onto the existing wire leads (After cutting out the blown fuse). Mr C works just fine for now. Thanks for the analysis. Amazing how small they can make a fuse for 120V usage.
This is a great vid. Who'd think such a tiny part could be so cleverly engineered. And like what was said earlier, by Tbone, people have no idea they are even there. The first time I ever saw one was yesterday when I disassembled a 1980s or 1990s Japanese made wall wart, (for some Ericsson appliance). It was indeed, buried in the heart of a beautifully constructed transformer. When I saw your vid, I just had to watch. Thanks!
Glad you enjoyed the video! Be sure to share my channel with others, rate thumbs up, and subscribe. Thanks
I have a resin paper weight from the Microtemp termal fuse manufacturer, with a fuse cutaway and the parts nicely layed out.
Absolutely the most detailed and accurate explanation I have ever seen. Thank you and please keep them coming...
Thanks Johnny! Be sure to rate thumbs up, check out my extensive video playlists, and share my channel with others.
they're in many appliances, thanks for this valuable information on them ...
You're welcome!
Another interesting video of something that not much is known about. I didnt know how the temperature could be rated accurately. Thank you for cutting one apart.
There is another electronic item which is not well understood. It is a problem and maybe you have done a video or plan one, it is how to repair wire ribbons that dont have copper wire but some form of powered metal between two plastic sheets. I have encountered this several times and can not find a repair method that works to rejoin a severed connection. Thank you again for the video.
Just bypass the faulty section with thin gauge enamel wire.
excellent video
so all this fuses must have continuity at room temperature? when they are broken no continuity.?
thanks..
Correct
Don't forget about black and decker blenders. I know this for a fact after fixing some of them despite back and decker telling me it should reset after a few minutes of cool down. Not what I saw when I opened it up, it was not a resettable thermal fuse.
Very nice video. The temperature briefly shown in this video commonly found in your refrigerator and microwave oven uses a bi-metallic strip similar to what is found in a mechanical circuit breaker. When the metal gets hot or cold it bends opening or closing the circuit.
Yes, water heaters also use bimetallic discs. :-)
I REALLY ENJOY seeing what makes things tick. That was cool. I wonder what is next. Thank you very much for sharing.
Thanks for watching!
Great explanation sir
Thank you!
Thanks. My Hedge Trimmer keeps cutting out and won't restart until completely cooled. I stripped it down, regreased etc. but I can see at least 2 components which might be a thermal switch and a fuse - tempted to just buy a new trimmer?
this was an awesome idea of. how these work, I've wondered how they worked but never furthered diving deeper!
I try to upload a wide range of videos for my viewers.
I remember the first time I encountered one of these in a slide projector lamp supply wiring. I thought the lamp had burned out, double disappointment.
Thanks for the take apart, sort of a non resetting thermostat
Glad you liked the video!
Adding to what has already been said by many.....great video, thank you for the useful information. I was wondering if it made any difference in which direction the fuse should be installed. My coffee maker went dead and I did check the fuse and it was the culprit. I ordered one through amazon. The only thing I failed to pay attention to was the direction the fuse was facing when I cut it out of the circuit. I assumed it doesn't make a difference as current can travel in either direction through a fuse.
Very very helpful video thanks so much
Good job but use vice grip when cutting Safety First
Excellent explanation and information. Thank you for sharing.
Glad you enjoyed my video Dan! I have many videos that cover a wide range of subjects, so be sure to look over my video playlists below, and most importantly share. Thank you
ruclips.net/user/electronicsnmoreplaylists
Yes thank you for the knowledge of possible silver recovery.
Excellent video!
Glad you enjoyed it! Be sure to watch my other videos and share. Thank you
very clear and concise description...thank you...
Christian Mildh You're welcome! Be sure to rate thumbs up, check out my extensive video playlists, and share my channel. Thanks
Good video, very interesting and well explained.
Glad you enjoyed it! Be sure to check out my extensive video playlists for other great videos of interest to you and share with others. Thanks
Thanks for the video. I've seen these in some appliances, I've had to replace a couple that were open. Cool how they work.
THANKS FOR THE VIDEO. MY QUESTION HAS BEEN ANSWERED BELOW. THET IS IT CAN BE FITTED EITHER WAY. FROM UK
Glad you enjoyed the video! Be sure to share my channel with friends, rate thumbs up, and check out my extensive video playlists.
maybe a sketchup drawing might be beneficial too
great video!
Another viewer posted one. :-)
The manufacturers like these because they hide them easily and most devices get thrown away and a new purchase is coming! It would be much more consumer friendly to use circuit beakers and/or other visible fuses. My opinion.
No, a regular fuse or a ckt. breaker is not the same and doesn't work the same way as this fuse.
My Philips fan heater from the early 80s has a thermal switch. There are clear instructions how to reset if the item overheats. Which happened only twice. I've seen new fans which omit this little feature.
@@Gunzee are you sure it doesnt also have a thermal fuse, rated for a higher temperature, as a backup? Sometimes they have that in case the thermal switch ever doesnt open for some weird reason. It's possible for them to stick closed (less likely than the contacts breaking causing a permanent open condition)
Hi ,i have a fruit liqudaizer and the motor stops working , i manage to open the bottom cover and found the ceramic fuse attached to the circuit board blown as according to my testing , but i cann,t get the acctual type of replacement , can i use this type of thermal fuse , if can what is the rating i should replace it and at what value volts ,, due most are 220v and my machine is 600w... can any any one help ...tks
@@sammy2888 check ebay or amazon, banggood or other places. Ceramic thermal fuses exist. (and neglecting to correct spelling and grammar reveals something else).
Thank you Doug. Is this a one time fuse,seems once the pellet melts, that would be it. Thus it would have to be replaced. Thank you again.
Bobby
Yes. Once the pellet melts, the tiny metal disc is allowed to press into the area where the hard pellet was. No going back. :-)
Thanks for posting this....well done.
Glad you liked it
You are the best tks a million
Glad you liked the video! Be sure to share the video link with others, and look over my extensive video playlists for many other videos of interest to you and share. Thanks
I am very new to electronics (only as a hobby, not my profession). Questions:
1) why is one end of the fuse shorter then another?
2) is it important how you connect it - "which way" should the "sharper" end face?
3) I would like to blow it that I connect some 9V battery to an LED via a resistor with having this fuse in the circuit. Using a lighter I would heat it up above 94*C. Any precautions maybe? I would probably use alligator clips for connecting the fuse to the linear circuit or maybe just some copper wire because I fear the clips will also overheat and maybe melt the rubber part.
Fuse type: SEFUSE, sf90r0, 94*C, 15A
Styles will vary. Works either direction.
had no idea a spring was in there i though that it was a chemical reaction going on
Thanks for watching! Please share my channel with others, and look over my extensive video playlists below for many other videos of interest to you.
ruclips.net/user/electronicsnmoreplaylists
It is a very informative video showing how the thermal fuse works. Thank you. I have a question: There are always two ratings for a thermal fuse. e.g: 115 degree 2A @ 250V. Does this mean, the fuse will blow EITHER the temperature exceeds 115 Degree or the current exceeds 2A? It is not that both conditions must be present before the fuse blows right? If I may use the Basic Logic Gate, it is a OR gate and not AND gate, right?
Exceeding the voltage rating will have no effect, only exceeding the max temp rating.
Thank you for your prompt reply. If this is the case then what is the purpose of specifying the voltage and current rating. Does this mean I can ignore all the other ratings and only look at the temperature rating if I need to replace a thermal fuse? Case in point. The thermal fuse of my standing fan blown out and it is rated at 115 Degree, 2 A @ 250V but I could not get a exact replacement and I bought one with a rating at 115 Degree but rated 10A @250V. It is safe to use this to replace the blown thermal fuse? I hope that you can advise.Thanking you in advance.
Simon Bosch f
The thermal fuse may blow if EITHER the rated current OR temp is exceeded. Resistors and other current carrying components, including thermal fuses, may fail if their rated currents are exceeded. The manufacturer is informing the purchaser that the thermal fuse is rated to handle up to 2A at 250V which covers European, American and most other common household voltages. This 250V thermal fuse can be used safely on nominal 120V American household appliances and even nominal 240V appliances like dryers. However, regardless of the voltage of the circuit, the thermal fuse is only rated to carry 2A.
He ask about exceeding amp rating, not voltage. I once replaced a 150C 1A cut off fuse with a 10A 150c cause only one I had. But I also added a simple 1A fuse in line. Transformer is still working to this day. BTW accidently hooking up 600V to rated 220V thermal fuse may not be a good idea?@@electronicsNmore
If you connect 2 of thermal fuse in serial, you will get twice as more? Like they will work together? (100+100 = 200)
is it one time use? one its blown you need to replace it or it operates after cools down?
One time
I always wondered what's inside one of these. I know what can happen to a transformer without a thermal fuse, as I found out when I had a transformer wired up but didn't notice a couple of the taps on the primary were shorted together. Long story short, a lot of smoke and insulating wax came out.
Seems to me that this is doing the same thing that the thermostat is supposed to do. I think I'll just short it. Probably some OSHA related junk.
thank you very much, very good job.
Glad you enjoyed the video! I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others. Thank You
Very informative. One question, when installing a new fuse, which end of the fuse goes toward power source? In your example, does the red "cone" shaped end go toward power source? Does it matter?
Makes no difference. I have a very wide range of videos, so be sure to check them out below and share my channel. Thanks Scott!
ruclips.net/user/electronicsnmoreplaylists
Very good, thanks!
You're welcome. Be sure to share with others and rate thumbs up. Thanks!
I LOVE THAT SHOW
Glad to hear that. Be sure to check out my video playlists, rate thumbs up, and share. Thanks!
The thermal cutoff fuse may blow if EITHER its temperature OR rated current is exceeded.
Say the manufacturer rates a thermal fuse at 220C 10A 250V. The thermal fuse will blow if it experiences a temperature greater than 220C, meaning a combination of the fuse's internal resistance heating and the ambient temperature it's being exposed to within the appliance.
The thermal fuse may also blow if the continuous current it is carrying exceeds 10A, regardless of the voltage of the circuit it is part of. Resistors and other current carrying components, including thermal fuses, may fail if their rated currents are exceeded.
The 250V indication means it's good for use in appliances connected to European, American and most other common household circuits. A 250V rated thermal fuse can be used safely in 120V American circuits and 230V European circuits. However, regardless of the voltage of the circuit, the thermal fuse in our example is rated to carry a continuous current no greater than 10A.
Correct, the fuse is rated to carry a certain amount of current, but if you go well above that rating, the fuse will heat up and cause the circuit to open as if an external high temp made it blow.
very nice video. You should mention that once the thermal fuse is overheated, it is blown and MUST be replaced. Not like a fuse that recovers when the temperature comes down. ALSO, notice the numbers on the fuse... go to a shop that sells these things and buy a new one. I paid about 5 euro (6 dollars?) for one and I think I paid too much?
Yes, these are a "One shot" deal. I figured viewers would know that when I explained how they work. $6 sounds pricey. Thanks for watching!
Thanks for answering. Hey another question please. My thermal fuse was not my problem. But I noticed NO continuity through the double heating element AND over 300 volts going through everything, even though we have 240 volts from the wall outlet (Europe). What might cause this spike in voltage?
so much for a little fuse
thanks
People don't realize how much is inside those tiny thermal fuses. :-)
Thank you like good 👍🏼
Glad you liked it! Be sure to check out my wide range of videos for many other helpful videos of interest to you, and most importantly share. Thanks
ruclips.net/user/electronicsnmoreplaylists
Great video. Are they single use only, or do they "fix" themselves once the temperature is restored? If they are single use, are you aware of an alternative that would be multi use. I'm thinking of a thermal sensor for a li-ion battery to cut the power to the battery if the battery heats up due to over or under charge or bad polarity - hopefully stopping thermal runaway. But it would be great if the fuse was reusable. If maybe the problem was not with the battery or fuse but somewhere else in the circuit for example.
Single use. You need a thermal switch.
Put a thermal switch in series with a thermal fuse, where the switch temp rating is less than the fuse temp rating. The thermal switch alone will not prevent overheating damage. This is how coffeemakers are protected.
thanks
mkilickap You're welcome!
Are these like a real fuse (one time usage)? Or can it switch multiple times?
One time deal.
awesome!!!!!
your the best dude!
Glad you enjoyed it. :-) It's always nice to see viewer comments like yours, they offset the comments I get from Trolls and other undesirables. Thanks for watching!
:) anytime man. I enjoy your lecture halls
does the Tapered side of the Thermal fuse have to be facing towards the incoming Power lines?! I have a Panini Grill with the Thermal Fuse fried! But I don't remember the orientation of the original install. Any suggestion would be appreciated.
Direction makes no difference.
What would be the recommended thermal switch temperature for an electric fan ?
It all depends on the insulation used for the fan motor's windings. I'd use 90 - 105C.
Sir thermal cutoff series connection can be or can't 128c 229c plz?
Good to know. Thanks.
great job !!!
Simple fix is to bypass the thermal fuse
Молодец очень хорошо
Спасибо!
🖖 👍
How often can the thermal fuses be used until they don't work anymore? 🤔
They last a very long time. Hair dryers have them.
I have a question! :) I have a two plate portable electric stove, or "hot plate" as they call them.. and the thermal fuse seems to be damage (bypassing it will turn on the plate) in my case, one plate es 1500 watts and the other smaller one is 500 watt and does NOT uses a thermal fuse, only the big one... now, since the thermostat know is working perfectly shutting down power when it reaches a certain temperature, could I bypass the thermal fuse?? I live in an island and electronic parts stores are closed (corona)
thank you in advance
I suggest replacing the thermal fuse for safety reasons(fire).
its like component PTC
sir you tell me how to apply such a thermal fuse, I am holding it, so it becomes loose after some time, it is the spark doer
How to punch it correctly
Are they self resetting, or one and done?
One time deal. :-)
Thanks for the quick reply! I've seen one burnt out in a buddies cheap compressor motor before.
Hi what kind of cut fuse do many battery pack company use . your advice please
All depends on the battery chemistry. You need to match the rating to the blown fuse. Doesn't have to be exact, but very close. Look online for more info.
Hi thanks for your swift reply
How do you test to see if fuse is bad or good?
Using a Digital Multimeter(DMM), set the meter to continuity or measure resistance(Ohms). Touch the test probes to each side of the fuse, you should get a very low reading or an alarm should sound. Be sure to look over my video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others on social networking sites. Thanks Bob
ruclips.net/user/electronicsnmoreplaylists
I'm sure thermal switches have a limited number of cycles.
Is it matter direction of connect? I just changed thermal fuse for Ninja air fryer, after plug power is on but showing E1 and E3. do you have any idea? please let me know. Thanks!
No, either direction.
@@electronicsNmore Thanks, after reconnect shows code1 and code2 do you have any idea?
What does I3 mean on the thermal fuse.
Where can I buy like this fuse I need for my cooker
amzn.to/2Rmua0m
Thanks for watching!
Please take care not to cut your fingers
Is there a polarity for these fuses. Similarities to diodes. I tried to replace one and it keeps blowing mains breaker. Suggestion???
No. They work either direction.
electronicsNmore ok. Great. I must have something grounded wrong then. Thanks
For this particular diode, polarity does not matter but as a rule of thumb, try to have the point of the diode going in the direction of your current flow. This just gets you in that muscle memory reaction of always running your polarity in the right direction. Just something I was taught by a long time installer.
@@bigpop-popsmurf This isn't a diode at all. Also, beware installing with a soldering gun. A typical 300 C soldering gun tip can blow a 220 C thermal fuse quickly unless something is done to limit thermal heat transfer to the fuse. Manufacturers spot weld the thermal fuses very quickly and repairs are usually done with mechanically crimped butt joints.
Is that piece made of silver made of pure silver or an alloy?
I didn't examine it under high magnification, but it's possible that it was only brass or copper plated with silver.
+electronicsNmore
Ok, thanks for replying.
In the real world, they often open without ever reaching the rated temp. i.e.- they fail.
True! I have a video coming up showing a worthless circuit breaker.
@@electronicsNmore So many small appliances are tossed into landfills simply due to these failing.
Should be a bimetal reset type...not a disposable trash one time us one... Not nice for mfg to do.
I've seen appliances that have a resetting thermal switch, but just in case that ever doesn't open for some reason, which is less likely than contacts breaking, but it's still a realistic possibility that a reusable switch, could eventually have the contacts "weld" together from the arcs.
So, to prevent a fire from starting, a thermal fuse could be included that's rated at a higher temp than the switch, to cut the power off in an emergency, just in case.
Even if there was a fire and they did get sued, they could settle out of court for a smaller amount, by pointing out the safety features they included to prevent fires from starting.
what a stupid part... i was working on a shop and we were selling heaters. most of them could last for years but no, the fuses were blown so i had to take them of the circuit.
No, never do that, they prevent fires.
My airfryer not coming on how to fix
Trying to find micro fuses on circuit board...what do they look like?
They don't look like capacitors or resistors, but sort of resemble diodes.
Here is a diagram which also shows it
cci-tco.com/wp-content/uploads/2015/06/sefuse2.jpg
Perfect diagram. Thanks for posting that link!
Great vid
pipi Glad you enjoyed it!