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My silicon diodes thank you for saving them.

No, reverse breakdown voltage of common Schottky diodes used in power circuits (i.e. with average forward current rating greater than half an amp or so) typically ranges from 20 volts to 100 volts. There are 150 V power Schottky rectifiers on the market. Silicon carbide Schottky rectifiers up to 1200 PIV rating are made but they are quite expensive. The 600 PIV parts would be useful in active power factor correction circuits. If I were still designing that sort of stuff I'd be considering them. The reverse leakage current can be an issue in some applications. Schottky diodes intended for signal use and with low reverse leakage do exist. Hewlett Packard used to make a range of them. I don't know if any of that line is still being made by the current owner of that former HP division.

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Maybe not in Russia or India, but this is common knowledge taught everywhere in the USA.

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1N4001s are 50v, 400v one is 1N4004 , and yes, germanium types or low power signal schottky such as BAT85 better for small signal use

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Actually, not well explained at all. This video makes it sound like a Schottky diode is better than a silicon diode across the board and that is patently false. There are a few big negatives to Schottky diodes as other posters I already pointed out. This is a very poor discussion.

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Best AI written and voiced article I've come across for shottky diode

That’s exactly what I was wondering. So what’s the answer?

I don't really know, but I'd guess better longevity and/or lower price.

@@williambock1821 In many applications the primary advantage of Schottky diodes is their very short "reverse recovery time." The video touches on this but doesn't explain it well. When the voltage applied to a diode is suddenly changed from the "forward bias" to the "reverse bias" condition (that is, from the anode being positive with respect to the cathode to the opposite), it does not stop conducting instantaneously. Ordinary silicon PN junction power diodes take quite a long time to turn off - their "reverse recovery time" is long and quite a lot of charge gets through. It has to do with getting "excesss carriers" out of the junction region. This is of very little concern in low frequency circuits such as rectification at AC mains frequency. When you get up into the frequencies of switchmode power supplies, which these day can range from around 50 kHz to 1 MHz or so (100 kHz is quite common for high power switchers), the reverse recovery time and charge becomes a problem. Ordinary silicon diodes would cause a lot of power loss. There are "fast recovery" and "ultrafast recovery" silicon PN junction diodes available that work much better. Schottky diodes have even shorter reverse recovery time. The other advantage is the lower forward conduction voltage, as described in the video. Sometimes that isn't important, but it is in lots of applications. At moderately high currents (a few amperes to a few tens of amperes) a silicon PN diode may have a forward voltage of around 1 volt. A comparably-rated Schottky diode might have a forward voltage of about half that. At 20 amperes, half a volt difference is a 10 watt difference, and something that has to be considered in real circuits. In power supply "ORing" circuits the forward voltage can be a big concern. There aren't many Schottky diode with reverse voltage withstanding rating of more than 100 volts, whereas silicon PN diodes can be had up to 1 kV. There are Schottky diodes with much higher reverse voltage rating on the market but they are expensive. In general, Schottky diodes are quite a bit more expensive than similarly-rated PN diodes. Schottky diode "reverse leakage current" (current that can flow when the cathode is positive with respect to the anode) tends to be substantially higher than in silicon PN junction diodes. This isn't a big deal in lots of applications but it can be in some. Even the reverse leakage current of a silicon PN junction diode can be a significant issue in some low-level precision analog circuits.

Not quite as leaky as a Germanium

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@@eeapplications Yes, I have already knew from your videos. Keep making more. You can make a new electronics world. Thank you.

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In the year 1971,we travelled to Henån City,and on our way home this Saturday,there was strange changes on the Car Radio, and like a big Church Organ,the Radio had very strongly effects with multiple frequences very loud. The Owner of the Car,Bert,said that we shall be alerted,because we are supposed to see something very rare.... Bert was right, there it was.Golden glowing. This was fascinating Never before have we seen such a Night glowing goldyellow gigantic wessel. Our Chauffor put the foot on the gaspedal. The Car motor was not quite tuned,ignistion And therefore we just was in speed,some 72 kilometer/per hour. Bert was keen on Study the under of the Gigantic Wessel. Just before we where about to reach the North side of the Tunnel,aproximate 30-40 meter,before outside the tunnel and on the South side of Bridge of Nötesund there was two sound,clang and clang,we hear as the window of the car,was down ,too be able to hear sound of the totally silent enourmos wessel hoovering some 50 meters above Sea Level..... Later we heard a withness tell,that he had taken a rifle,and shot two sharp ammunition under up of the Wessel. That was the exponation,clang + clang,underneath this Wessel... Glass Metal is 50 times stronger than ordinairy Metal or Stone. But anyhow,fraction of seconds Thereafter,20.13 in this Evening,in a very strong white,Sonoluminiscence flash that move Easterly directions with an immence acceleration,that no living thing could have a chance to survive. My beliefe is that we saw a TIME-travel... Withness saw 5 or 6 white Flashes along the pathway of this Wessel,at this time 20.13 20.04 o clock this Wessel came out of misty fogg,just materialized, 3 children aged 7 year old girl,and two cousines,about 9 year old,told us that they tought it was the Moon. They realized that it was not the Moon. This came to their attention,as they saw the pattern under this Wessel..... So this all happened this November evening. There are more details.Houses went dark,all electric devices stopped working,because of this Electro Magnetic Pulse. There was also seconds later,a big rubyred glowing cloud,in Eastern direction,it was very special movements,hard to explain. And seconds later a big dark blue NATO-star,it was only there for 5 seconds,and when it nomore was glowing,the Ruby Red Cloud went gone.There was as nothing have happened. Dark and somehowe terrific,like in Cinema. But this was a genuine UFO. NOTHING about it in the news. Not in Television,not on Radio,not in Paper News.1972 i wrote to Elvis Presley about it. No answer.But years later i got a letter from Bill Clinton. This ought to be told the children that UFO is from the Future Earth,visiting back in Time.

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Don't confuse the picture. It's very rare that we need to talk about electron flow. We only need to talk about electron flow if the internal operation of the diode is being explained, particularly around the formation of the depletion region. I have had stupid arguments with idiots on KZfaq that seriously thought that we should just change over night to only talking about electron flow and making that the direction of current. Many people become confused between the two. It's best to leave out mentioning of electron flow unless explaining the internal operation of semiconductor devices and valves.

I agree. It is very rare that we need to talk about hole flow. Electron flow was taught for decades in colleges and universities and then somebody just thought that we should just change over night to only talking about hole flow. A coulomb is related to the eV and is defined as the number of electrons flowing past a point in a second.

@@BarryPiper correct. I think it's ridiculous to try to talk about hole flow in electronic Theory. You know electron flow > electron•ic

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This is why the PV String is not saved with the Schottky diode. I was wondering before i read your comment.

From this video it seems there are no downsides to the Schottky diode. So why ever use regular diodes? Cost?

@@jarls5890 they dont have as high reverse breakdown voltage, usually 20 to 40v depending on type number, standard types can be over 1.5kv depending on number..

So what?

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what would the disadvantages entail?

@@monoki8708 : I believe back leakage current is the disadvantage.

​@@monoki8708 in reverse there's a bigger current leakage than a silicon diode

up to 100x more expensive

@@SANTO971nonsense

A light dependent resistor is not really any good as a switch because an ldr is like having 2 resistors in series, this voltage divider creates a voltage based in how much light falls on the ldr, when 0.6v is reached that can turn on a transistor that powers your light/device

Yes.

I'm glad you like the video 😊 Unfortunately I don't know about that 😔

Current gain? It's a diode, not a transistor.

It doesn't conduct in both directions as long as the maximum reverse blocking voltage rating isn't exceeded. It behave like a silicon PN junction diode in terms of forward conduction (anode positive with respect to cathode). However the reverse "leakage" current of a Schottky diode is typically higher than for a comparably-rated silicon PN diode. This leakage current is too small to be of much concern for rectifier use, but it can be a significant in other uses such as low-level analog circuitry. There are small Schottky diodes made specifically for small signal applications. They are typically designed to have very low reverse leakage current. There are many silicon PN junction diodes with reverse voltage withstanding (blocking) capability up to 1 kV. It is easy to make them. Most Schottky diodes have a reverse blocking voltage rating of 100 volts or less. It is possible to get types with up to about 150 V reverse blocking rating, but there aren't many choices. There are types made with silicon carbide that can block up to 1200 V in reverse but the forward voltage is higher than that of a silicon PN junction diode and they are expensive. They are still very useful in some circuits because of their very short reverse recovery time.

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@@eeapplications thanks for your kind information stay blessed

Thank you so much 🙏🏼😊 Of course it can be used 👍

@@eeapplications You're welcome.

No. You cannot. We can, however.

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Reverse voltage values ​​are low. Therefore, it is not suitable for use in rectification circuits.

😊 No, his not. Many people think of this sound as a computer sound 😅 I couldn't convince him that he was a professional. I'm glad you like it, thank you ☺️

@@eeapplications The voice sounds realistic but the phrasing is off in some points. Reads like English is the second language of the writer.

From 5:26 we can see that the reverse breakdown voltage is not as good, typically around 50 volts or so. In applications where reverse breakdown voltage is important, silicon diodes win.

Here it is described according to the traditional current direction.

@@eeapplications It was learned in the old days of vacuum tubes that current flows from cathode to anode. This crap you are promoting is due to kids that don't know why the arrow points the opposite direction. The arrow's direction has NOTHING to do with current flow.

Electric current isn't always electron flow. Electric currents in salt water and inside human bodies are positive sodium ions flowing in one direction, and negative chloride ions the other. Even in pure semiconductors, there are something we called hole currents which go the opposite direction to the electrons. So in conventional circuit calculations, we ignore whether it is the flow of electrons, ions or holes and just assume it is positive charge flowing from positive terminal to negative terminal for the sake of simplicity.

Current should go in both directions unless bigger than 0.65V

"Conventional current" is considered to flow from positive to negative. Most of the arrows in semiconductor symbols correspond to conventional current flow. It's something you just have to get used to because the use isn't going away anytime soon. It is important to specify if you mean electron flow or conventional current flow if you are explaining something to a novice.

RF Mixer circuit.

Can it be replaced with 1N4148?

First of all, thank you for your interest 😊 I will try to do it in the next time 👍

You can - briefly. They are just not designed to dissipate the 6W of heat produced in the junction while it is happening. When the junction hits 120C it stops working - permanently.

Max surge current is 30 amps. So yes it can handle high current transient spikes. Not everything in electronics is straight DC bro. And diodes are often used as clamps to dissipate spikes, like from inductive kickback.

It is, the battery is not the power source in the diagram. The solar panels are the power source and the battery is the load - the solar panels are charging the battery.

Your question makes no sense. Ask better questions.

Its a small-signal silicon diode optimised for a fast recovery rate hence its use in switching , usually in glass packaging they cant handle much power. "Compared with signal diodes, rectifier diodes generally have higher current ratings, can have much higher reverse voltage ratings, but have higher leakage current and greater junction capacitance.[16] " en.m.wikipedia.org/wiki/1N400x_general-purpose_diode en.m.wikipedia.org/wiki/1N4148_signal_diode#Specifications 😎👍☘️🍺

I believe they are classified as Switching Diodes, which got me thinking what is the difference.

The 1N4148 is a silicon PN junction diode optimized for "fast switching." As long as you can live within their current and voltage ratings they are pretty decent all-round compromise diodes. The reverse recovery time is short (4 ns, iirc) and their reverse leakage current is tolerable in lots of applications. If you need very low reverse leakage current there are much better diodes (the collector-base junction of a transistor like the 2N3904 has much lower leakage but is on the slow side; the base-emitter junction leakage is even less and is faster but the reverse breakdown volltage is around 6 volts)

This is narrated by a robo-narrator. That is consistent with the shottky diode being referred to as a "shock" diode around 4:57 and as a "choke" diode at 7:43. They have glitches like that.

No.

Perhaps 🤣

Gunn diode isn't a diode in the normal sense (check the Wikipedia entry on it for more info), and Shitake is a type of mushroom used frequently in Japanese cuisine, so I'm guessing autocorrect is at fault there. Schottky diode is good for high frequencies, but not great for high reverse voltage (more than 30v) applications. It's not so much a case of "Which is better", but "Which is better in my particular case" - and that is a lot harder to answer. Hope this helps. (and I want mushrooms now ;)

Shitake diodes are probably tastier

No.

Search schottky diode construction

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You can remove subtitle from youtube video settings.

That is the way that they work.

@@eeapplications Some people need the captioning. Why should they have to accept losing information from the diagrams because they need the captions? The content creator should take this into account and not put important information or text in the area where captions are likely to be displayed.

They divert current around other series panels. This is advantageous in that it reduces energy loss.

If one or more panels are shaded the power drops of considerably. The diode will allow the current from the unshaded panels to bypass the shaded ones

Did you say thanks to the 2 responses?

​@@jasonharrison25thanks

They are there almost entirely to protect a panel that might be shaded from having current driven though it by other panels that are receiving normal illumination. They rarely do anything useful in terms of power delivery, especially in an array where you have both parallel and series connections of panels.