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Nordic 8th October 2005 04:57 PM

Hot hot ouch - rectifier
Ok except for the 2 2VAC windings, my transformer also has a 6VAC one... rated at 1A,

I connected a bridge rectifier to the 6V, and connected the rectifier to a small 12VDC PC fan...wich says something about 0.1A on it...

It all runs nice and quiet due to the low voltage, but the rectifier heats up something mad...

:confused: :confused: :confused:

djQUAN 8th October 2005 05:34 PM

you forgot to mention what bridge you are using.

if that's a 35A one, then something is definitely wrong!:D :clown:

Nordic 8th October 2005 05:52 PM

It says RS405

Looked it up now
4.0 mA single-phase silicon bridge rectifier in 4-pin KBL package. Operational temperature range from -55C to 150C, hmmm so maybe this is too small for a 1A winding...

Jan Dupont 8th October 2005 06:27 PM

I shall be hot ;)
You are using a 4 mA bridge to pull a 100 mA fan :D

Nordic 8th October 2005 06:31 PM

hehehe, luckily it was sitting right infront of the fan...

I have some BZT03C10 diodes... lol whatever they are (looks like little white eggs with a black line... and looks tough... (put on flamesuit).

Maybe I can build a rectifier using these (I have 4)

How do I tell the rating? did see it before but can't find it again.

djQUAN 8th October 2005 06:40 PM


what you have is "Silicon Z-Diodes and Transient Voltage Suppressors"

according to

Nordic 8th October 2005 06:44 PM

No man don't say that, now i have to wait till monday again...

Would you care to explain why not...? It seems they can handle some 15V and 20A

djQUAN 8th October 2005 06:54 PM

let's just say what you have is a 10V zener diode.

don't you have rectifier diodes in your junk box? the 1N400X diodes are the most common and you can find them in almost anything electronic.

Nordic 8th October 2005 06:56 PM

Would the x represent the amperage rateing?

djQUAN 8th October 2005 07:00 PM

nope. X represents the PIV or peak inverse voltage.

all the 1N400X diodes are 1A.


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