[Amps] Bias Zener Diodes In Parallel ?

[Steve Katz]

> Does P  equal I^2*R, Tom? 
	  
	Yes, actually, it does!

>  I thought P equals E*I = 4.48w.
	  
	Also correct! 


> >You know diodes can run pretty hot and remain safe.
> 
> Zener case temp is 25ºC/77ºF-max at rated dissipation.
> 
	Another point to ponder is that Zener devices have a TCZV which
makes them drift quite a lot.  That applies to "zeners" having a Vz of
<5.6V.  Devices having a Vz of >6.2V aren't really "zeners," they're
low-voltage avalanche diodes selected for specific avalanche voltages.
Those also have a TCBV, and it's just the opposite of zeners.  Around 5.6V,
the TCZ or TCBV is usually zero, so this is a very good voltage to use, when
possible.  It's about as stable as a zener gets.

	-WB2WIK/6


> -  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, 
> www.vcnet.com/measures.  
> end
> 
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