Rectifiers - is the lettering just the manufacturer?

Darfyddi · Mar 28, 2012

Hi all,

New here but I think this is the right place to post?

I need to replace an 8a 1000Vmax recitfier which I thought would just be a like for like easy swap but when I search for my dead one - rs_807 I struggle to find any on this island of ours. I can only find KBU_8M that appears similar. Could you please look at the two following and tell me if they are the same?

Dead one RS 807

Possible replacement KBU 8M

If anyone does know where I can buy a single rs807 (non trade) I would be greatful too.

Many thanks to all that take their time to look at this and big cheese to any answers.

telectrix · Mar 28, 2012

common or garden bridge rectifier, RS, cpcfarnell, maplins.

Knobhead · Mar 28, 2012

Maplins would be easiest if you’ve got one near you. RS and Farnell you had to set up an account as I recall.
Do you really need a 1000V rating?

Darfyddi · Mar 29, 2012

Sorry, I should have said in the original post: I phoned Maplins as I couldn't find anything close on their site and they couldn't help.
The rectifier is in a transformer for a reclining sofa, 240vAC 0.5A input, 24vDC output(though I measured 36v on one of the others) 3.5A.

Becuase it is in an existing pcb, I want to get the right dimensioned/leg layout for a straight swap. As for the size of the existing rectifier; I don't know why they chose such a capable unit but as I don't know what the lettering means on them, I was worried that the wrong one might lead to a fire risk.

Is there a difference between the two I linked above or are they the exact same item just from two different manufactures?

Knobhead · Mar 29, 2012

That should be fine. Both 8A @ 1000V, same form package. One thing though the two you’ve listed “minimum order 1000”. Time to start looking around.

http://uk.farnell.com/fairchild-semiconductor/kbu8m/bridge-rectifier-8a-1000v-kbu/dp/1467482

Darfyddi · Mar 29, 2012

lol, I can get them individually from an ebay seller - I only put those two links up as they had the proper specs to them but thank you for pointing it out.