Instead of a standard diode, use a Zener Overvoltage Transient Suppressor
Bidirectional type. Does not matter which direction you install them. NTE
4933 which is rated for 36 volts that is use on 12 volt circuits.
These Transient Suppressor are listed from NTE 4933 to 4999 depending on
voltage.
I use them on all my contactor 12 volt coils and some on 180 volt coils on
my safety contactors.
Roland
----- Original Message -----
From: "Paul" <
[email protected]>
To: "Electric Vehicle Discussion List" <
[email protected]>
Sent: Thursday, August 16, 2007 4:14 PM
Subject: Re: [EVDL] stupid snubber diode question
> I still think of it this way - I diode diagram is an arrow and bar.
> Electrons in a wire flow from negative to positive. If they run into
> a diode the arrow and bar mark out "this way - NO." (>| electrons
> cannot follow that from left to right.) The band on a diode is the
> bar and the arrow is not shown.
>
> To use it as a snubber you want the diode installed so it doesn't
> short out the power to the coil. In other words, the band to the
> positive side of the coil.
>
> Most Albright contactors come with a regular diode as a snubber. When
> my Curtis shorted ON an Albright SW200 with a diode slowing the coil
> opening still had no problems disconnecting my 10 Optimas from my
> Prestolite motor. Its not the best solution but if you are not
> working your relay or contactor to close to its limits it can be a
> fine solution.
>
> Paul Gooch
>
>
>
David Wilker wrote:
>
> > ---- Eduardo Kaftanski <
[email protected]> wrote:
> >
> > Which way does the banded end of the diode go? negative?
>
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