I've been looking high and low on RS for a decent 10+ A 20+ V 0.5- Vf diode and frankly the choice on RS is terrible !!! they do not seem to have much choice in componenets at all ! Farnell seem to have a better search function and more choice, is this just my imagination ? who do you normally use ? who provides the most choice ? its rather difficult trying to design something particular and not be able to find parts that meet your needs is it ?
Yeah, it really depends where you live. Where I live, standard UPS ground shipping from Mouser arrives next day without fail. Of course, they are a 3 hour drive up the interstate highway from me. Digikey is usually 5 days or so, but they are several states away.
Pull apart any old PC power supply. The TO-220 schottky diodes are usually good for 10A+ and 20v+ and are less than 0.5v when conducting. The TO-220 is also usually a dual diode, you can just connect the outside pins to parallel the 2 diodes.
I've been looking high and low on RS for a decent 10+ A 20+ V 0.5- Vf diode and frankly the choice on RS is terrible !!! they do not seem to have much choice in componenets at all !
who do you normally use ? who provides the most choice ? its rather difficult trying to design something particular and not be able to find parts that meet your needs is it ?
I use both RS and Farnell, they both dont stock exactly the same items, if one does not have what I want, I try the other.
For our American readers, in this context RS is RS Components, not Rat Shack!
And for those old enough to remember, RS Components was originally called RadioSpares.
A huge selection of parts is useless if they don't have a good search engine. In that respect, DigiKey is king, with the most selectable attributes in their search engine.
Yeah, it really depends where you live. Where I live, standard UPS ground shipping from Mouser arrives next day without fail. Of course, they are a 3 hour drive up the interstate highway from me. Digikey is usually 5 days or so, but they are several states away.
A huge selection of parts is useless if they don't have a good search engine. In that respect, DigiKey is king, with the most selectable attributes in their search engine.
very true, yes RS have tons of parts but nothing of those i want ! every diode from RS capable of the current I want has an If of well over 1 V !!! some 2+ V absolutely useless
Mostly I use RS and Rapid Electronics, Farnell now and again. I have an RS Trade account and only live a few miles from their warehouse in Corby which is handy when I need something same day.
Wow, I didn't know that. Their rate schedule upon ordering doesn't show that... or if it does I've been missing it. My last order, certainly under 1/2 pound, cost $7.51 to ship via UPS. Shipped out 9/3 and arrived 9/9.
If you really need a Vf of 0.5V or less at 10A and 20+V, consider "active rectification". If you can find or create a control voltage, a <50mohm MOSFET will do the job even better than a diode.