 Welcome to The Great Search with Digikey and Lady Aida. This is when Lady Aida goes to digikey.com and shows you all the things that she's really good at, including being able to search and find and help people maximize their potential on a search. Yes. Okay, so I'm using this MBR540, which I respect in my design. A lovely little shocky diode. It's a 40 volt diode. I use this for a lot of basic shocky needs. Why is it so high? Cause I use it in some boost converters as well and some of the boost converters go pretty high. So I use up to 40 volts. But when I went to digikey, it was out of stock, which is like, I've never seen before, but like, you know, for whatever reason, this is out of stock. What to do when your part is out of stock? This is a good thing to know. Well, first off, if there is a lead time estimation, you can click on the check lead time and in this case, this is past due. And that happens, you know, like we order stuff. Sometimes it doesn't ship when it's expected to, but this gives you an idea. I have ordered parts and, you know, or wanted to order parts, I check the lead time and it says like, it's six months out. That makes me really think about, well, do I want to find like a totally alternative part or like, do I have to design some other, something else for my PCB? Cause if it's three to six months, it might be easier for me to just redo the design. In this case, it looks like they were expecting to get it and they didn't, you know, there's lockdowns in various countries, shipping is delayed. Could be a lot of reasons why this part is unavailable. I will say sometimes parts are unavailable for back order. In this case, I could back order it and it will ship whenever. In the, in a particular case of this week, I really needed the part in the next day. In that case, there's a new thing on Digi-Key and this, I think this is like new as of like this month or this week. I've never seen it before. And they actually give you substitution suggestions. And what's interesting is that they have direct and maybe similar substitutions. So in this case, this part, the MBR054, they're like, look, this is a generic diode, just like the one and 4,001 that you might be familiar with or the one and 4148. This diode is also just a generic number diode and it's available from multiple suppliers. This is from Microcommercial, MCC, but you can also get it from OnSemi. In which case, you'll want to verify just the package, you know, trust but verify. Yes, this is almost certainly a direct substitute, but you'll still want to make sure that you've got all the specifications correct. In this case, there is like a half a million in stock. So this is great. You can check the specifications down here. These are like the quick specs and then of course the data sheet if you're looking for something in more detail. I'll also tell you what to do if there isn't the direct substitution. Sometimes you're lucky. In this case, I was like, that's really cool because I just picked up the substitute and I was good to go. Well, let's say there isn't a substitute. Keep scrolling down and you'll see the product attributes section. In this case, you could see the attributes that you would select under search and what you can do is you can click these to view similar. So for example, okay, let's say that new magical section didn't exist. I'd say, okay, well, I want a diode. I don't need it from MCC. I do need to be tape and reel. I need to be active. I need to be a shocky diode. I want 40 volts voltage reverse protection. I want 500 milliamps current average rectified. The voltage forward may vary a little bit. So I'm not gonna check that. I'm gonna say, yes, I want a fast recovery type. The reverse leakage also may vary a little bit and the capacitance may vary a little bit. So I want surface mount and SOD123 that's the physical package and the operating temperature. And then when I click view similar, it will pop up. In this case, only six results were similar. And you'll see how the voltage, one is like 515, one is 510. You don't wanna select all necessarily. You want to select the ones that are important to you and then you can use the search drill down to verify which of the other more variable attributes are important to you. And in this case, looks like basically came up with almost the same things. It's basically got the on semiconductor NBR0504s. You can click in stock to get just the ones in stock and then pick up this diode, which will do the job for you. So this happens a lot as an engineer. I always tell people have multiple sources for each component because you never know. We've had parts that we've purchased and then we find out like, oh, hey, that factory in the Philippines caught on fire because there's an earthquake. You're not gonna get that part for four months. That happens and when they get back into business, I'm happy to purchase from them. In the meantime, you might want to have an alternative source. So using the suggested alternative from DigiKey is a great way to make sure that your product is it held back because something is out of stock. Especially like a four cent diode. Such a shame to hold back a $50 product because of four cents. All right, and I think, you know, took a screenshot when you were showing me this one. It was really cool, at least you talked about this. That's right. And substitutes, powerful, trust but verify, keep going. Don't let production halt. That's right. This has been another great search. Thanks everybody. By DigiKey and Lady Ena.