I need a diode to replace a shorted SB2100 in a TV power supply. It’s a 2A 100v schottky. I’ve read you don’t want to replace Schottkys with silicone as the Schottky is a very fast diode. What if you have a very fast silicone?
I’m trying to find one I have in my stash as a replacement. The pulse speed on the SB2100 is 300 microseconds.
I have a couple of the RGP25M-E3/54. It is a 1000v 2.5A and it is an ultra fast with a speed of 500 nanoseconds. Converting to nanoseconds the SB2100 takes 300,000 nanoseconds. So the RGP is much faster.
Am I looking at this wrong? Is there any reason I couldn’t use this diode as a replacement?
Dan
I’m trying to find one I have in my stash as a replacement. The pulse speed on the SB2100 is 300 microseconds.
I have a couple of the RGP25M-E3/54. It is a 1000v 2.5A and it is an ultra fast with a speed of 500 nanoseconds. Converting to nanoseconds the SB2100 takes 300,000 nanoseconds. So the RGP is much faster.
Am I looking at this wrong? Is there any reason I couldn’t use this diode as a replacement?
Dan
Replace schottky with schottky, the low forward voltage affects PSU efficiency directly.
Plenty of 100V 2+A schottky diodes out there!
(Actually many are SMT of course, but how about https://uk.farnell.com/stmicroelect...single-2a-100v-do204al/dp/3129993?st=schottky
Schottky diodes have zero reverse recovery time, only capacitance limits their speed, no idea where you get the 300µs figure from.
No silicone diodes exist anyway 🙂 Perhaps you confuse the element silicon with the family of polymers given the generic name "silicone"? Completely different things, like confusing diamond with wood!
Schottky diodes are usually silicon too, I think you mean to contrast a pn-junction diode with a schottky (metal-semiconductor) junction.
Plenty of 100V 2+A schottky diodes out there!
(Actually many are SMT of course, but how about https://uk.farnell.com/stmicroelect...single-2a-100v-do204al/dp/3129993?st=schottky
Schottky diodes have zero reverse recovery time, only capacitance limits their speed, no idea where you get the 300µs figure from.
No silicone diodes exist anyway 🙂 Perhaps you confuse the element silicon with the family of polymers given the generic name "silicone"? Completely different things, like confusing diamond with wood!
Schottky diodes are usually silicon too, I think you mean to contrast a pn-junction diode with a schottky (metal-semiconductor) junction.
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Okay great thanks. I actually just decided to order the correct diodes. Are you telling me that certain diodes aren’t made from the same material that my oven mitts and other fun jiggly things are made of? Oops drop the “e”, didn’t mean to type that. I knew they werent silicone, and actually silicon, just a quick typing typo.
Thanks!
Dan
Thanks!
Dan