The Positive Temperature Coefficient (PTC) Thermistor: a less known device

This video replaces a previously posted video that was inadvertently erased.

[@davidandrews8566]

Very interesting and informative thank you Professor. Greetings from the UK.

[@sambenyaakov]

Thanks David and best wishes.

[@kolinevans9127]

Thanks for sharing, very useful device.

[@sambenyaakov]

Thanks for watching

[@robsonrodrigues3804]

Hi , thank you for sharing this value information. I have a question, can i simulate the work of a motor with this PTC? I mean .. when we start a motor it has a high current, because of low resistence and right after the indutance rise and lower the current, this PTC could do the same in function of temperature?

[@sambenyaakov]

I doubt in amotor you need a reactive component.

[@snnwstt]

Since the temperature raise is not instantaneous, as also shown in your nice analog circuit by the capacitor initially unloaded, a sudden inrush current will still be possible, at the start of the process. So the PTC really protects an already somehow robust circuit, able to sustain for a short period of time, a large current, right?

[@sambenyaakov]

Indeed

[@Antyelektronika]

Hi, question to the minute 4:58. Why switch which is below Vlink is opened? Thank you for answer

[@sambenyaakov]

Correct, Thank for your pointing this mistake.

[@flipschwipp6572]

Hi, can you try make a video where mathematics is not the central ponint? Would really apreciate people getting understanding and feeling for electronics by just learning the mechanisms not the calculations.

[@sambenyaakov]

Thanks for comment. It would seem to me that my videos are highly intuitive yet accurate from the engineering aspect. The level of mathematics is basic, below that it will slip to story telling.

[@uksuperrascal]

Sam is a Prof. And can not understand how to educate to the layman, He expects every one to Know what he knows. Thinking, if you are that interested do the research, but saying it in a polite way, So for less mathematics KZbin search NTC & PTC Thermistors - Lots of videos out there.

[@GunnerJoe93]

Would you say a PTC can be used as a fuse?

[@sambenyaakov]

Not Really since the résistance goes up. NTC might.

[@NiHaoMike64]

They're often called "self resetting fuses".

[@akosbuzogany2752]

Look for Multifuse or Polyfuse.

[@snnwstt]

@@NiHaoMike64 Right, as on PC-power supply, which can turn off in a case of a short, and come back to life, could I say, after cooling down.

[@sambenyaakov]

Yes, these are available but strictly speaking they are not just PTC but include a switch.