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Class A supply.

Class A supply.

Class A supply.

(OP)
Greetings.

I need a AC/DC, 100W, 12V, global switching supply for an international product.  Something like a open U-channel or possibly a finger safe model.  I've just looked at about 120 different models/brands and I've not found A SINGLE ONE that is FCC Class A, (Conducted/Radiated Emissions), for use in a home oriented device.  They are so rare,(virtually non-existent), that I am starting to suspect that none are and that you just need to add a common-mode line filter or something similar, in front of a Class B to reach Class A land.

Has anyone got any experience with this situation who could shed some light on the subject?

Keith Cress
kcress - http://www.flaminsystems.com

RE: Class A supply.

I suspect you will not find any. Same thing with VFDs. There are CE marks on most VFDs (put there blindly, I think) but have you ever seen a VFD approved for use in home applications?

Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

RE: Class A supply.

Keith,
Class A is more lax than Class B, most industrial power supplies are Class B. Were you looking for ClassA because you want something cheaper?


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RE: Class A supply.

(OP)
Whoa Jeff!  Have I got it backwards?

I asked the thread question of a supply maker today and his answer was so bizarre that I couldn't believe it, and so I ignored it.  But me having the A and B reversed would sure explain it.

OK, I just confirmed that...

Thanks Jeff.. Wow, besides the screw-up, that makes my week, as a horrid torturous search for unobtainium just evaporated into manna from heaven.

 

Keith Cress
kcress - http://www.flaminsystems.com

RE: Class A supply.

I always get those 2 confused.  Guess my option is expensive and radiates more energy.

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