Hot hot ouch - rectifier

Nordic · 8th October 2005, 04:57 PM

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...

ANY ADVICE?

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!

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 -55°C to 150°C, 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

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

dont.

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

according to http://www.datasheetarchive.com

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.

1=50V
2=100V
3=200V
4=400V
5=600V
6=800V
7=1000V

8th October 2005, 04:57 PM	#1
Nordic diyAudio Member Join Date: Sep 2005	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... ANY ADVICE?

8th October 2005, 06:27 PM	#4
Jan Dupont diyAudio Member Join Date: Apr 2003 Location: Copenhagen, Denmark	I shall be hot You are using a 4 mA bridge to pull a 100 mA fan __________________ Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com

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8th October 2005, 05:34 PM	#2
djQUAN diyAudio Member Join Date: May 2004 Location: manila	you forgot to mention what bridge you are using. if that's a 35A one, then something is definitely wrong!

8th October 2005, 05:52 PM	#3
Nordic diyAudio Member Join Date: Sep 2005	It says RS405 Looked it up now 4.0 mA single-phase silicon bridge rectifier in 4-pin KBL package. Operational temperature range from -55°C to 150°C, hmmm so maybe this is too small for a 1A winding...

8th October 2005, 06:31 PM	#5
Nordic diyAudio Member Join Date: Sep 2005	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.

8th October 2005, 06:40 PM	#6
djQUAN diyAudio Member Join Date: May 2004 Location: manila	dont. what you have is "Silicon Z-Diodes and Transient Voltage Suppressors" according to http://www.datasheetarchive.com

8th October 2005, 06:44 PM	#7
Nordic diyAudio Member Join Date: Sep 2005	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

8th October 2005, 06:54 PM	#8
djQUAN diyAudio Member Join Date: May 2004 Location: manila	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.

8th October 2005, 06:56 PM	#9
Nordic diyAudio Member Join Date: Sep 2005	Would the x represent the amperage rateing?

8th October 2005, 07:00 PM	#10
djQUAN diyAudio Member Join Date: May 2004 Location: manila	nope. X represents the PIV or peak inverse voltage. all the 1N400X diodes are 1A. 1=50V 2=100V 3=200V 4=400V 5=600V 6=800V 7=1000V

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