Hi
I have a couple of Diodes on a Power Board that need replacing , seem to be having a problem getting the exact same: SR2A0 ! .
Can anyone suggest a replacement Diode ?.

Spike

 

Will these off ebay do ! .
https://www.ebay.co.uk/itm/4-X-RL20...984353?hash=item23ba17e861:g:DVQAAOSwOYFaaf~4

 

Only way to tell is to run down accurate datasheets for both parts. Without that, making the determination will be pure guesswork. Are you OK with pure guesswork? How has it worked for you in the past?

 

Check out Alldatasheet.com to find component specs.

https://pdf1.alldatasheet.com/datasheet-pdf/view/502793/CHENDA/SR2A0.html

 

SR2A0: https://au.apexelex.com/specs/diodes_schottky/SR220-SR2A0.pdf
This is the other one on ebay: http://www.rectron.com/data_sheets/rl201-rl207.pdf

The ebay one is RL207

Doe R mean Regular and S mean Superfast ?

Looking at both data sheets to compare makes me dizzy !

 

Doe R mean Regular and S mean Superfast ?

That seems highly unlikely. If there is some "encoding" in the part number it will likely be detailed in a proper datasheet. That is the only way to be sure. One more thing: in a career spanning half a century I have never heard of diodes being referred to as "Regular" or "Superfast". I'm pretty sure those terms have no precise technical meaning. Did you make them up?

 

Looking at both data sheets to compare makes me dizzy !

Do you even know what to look for, when comparing two diodes for a specific application?

 

Do you even know what to look for, when comparing two diodes for a specific application?

Short answer , no , there is some different info on both of these data sheets ! .

That seems highly unlikely. If there is some "encoding" in the part number it will likely be detailed in a proper datasheet. That is the only way to be sure. One more thing: in a career spanning half a century I have never heard of diodes being referred to as "Regular" or "Superfast". I'm pretty sure those terms have no precise technical meaning. Did you make them up?

Yes, sorry was getting mixed up with another post regarding ceramic fuses, been a busy week ! .


First thank you for your replies, much appreciated .

The SR2A0 is a Schottky Barrier Rectifier, and the RL207 is a Silicone Rectifier, now has you have found out my knowledge of Diodes is very limited, I am only a common garden Electrician.



Below a "Fast" Diode !!

http://www.farnell.com/datasheets/2861123.pdf

 

Here is a fast and a Ultra fast diode !!

https://uk.farnell.com/multicomp/uf...K-SHOPPING-SMEC-Whoops-Newstructure-31Aug2020

 

The major difference between a Schottky diode and a silicon diode is the forward voltage drop. It depends on the current through the diode, but for a Schottky diode it is between 0.2 an 0.3 volts. For a silicon diode it is between 0.6 and 0.7 Volts.

Another factor to consider is the Reverse Breakdown Voltage. This tells you how much voltage in the reverse bias condition the diode can stand before it fails. Using a diode(s) in a rectifier this specification is critical. You need a higher reverse breakdown in Europe where the mains voltage is 240 VAC.

Fast Recovery and Ultrafast Recovery refer to the Reverse Recovery Time. Using a diode with an inductor it is important to know how long the reverse recovery period will last.

"When switching from the conducting to the blocking state, a diode or rectifier has stored charge that must first be discharged before the diode blocks reverse current. This discharge takes a finite amount of time known as the Reverse Recovery Time, or trr. During this time, diode current may flow in the reverse direction."

 

Schottky is a special type of diode. This one at Mouser looks very similar:

https://www.mouser.com/ProductDetail/Comchip-Technology/SB2100E-G?qs=tw%2BuQ/B6PO1GvwpP92ngjg==

 

Thanks Guy's for your help, I have found one to check out, seems to be very similar, could you kind Guy's have a look at it to see if it would do for me .

Attaching; Original Diode SR2A0 .
Attaching : SB3100 ( Told same spec as a SB2100 except 3A not 2A!)

Cheers
Spike