Replacing SB360 with SR340?

Hi!

I was down at my Friendly Local Electronics Store for parts for the Stepper Motor Driver (v. 1.2). He didn't have the SB360 diodes, but said that for this purpose, SR340 diodes would do. Was he right? Are there any limitations I should know with this difference? Or should I take them back and order SB360ies over the net?

Thanks in advance,
-Lars

They look like they will do the job to me. They are both 3A Schottky diodes. The SR340 is 40V whereas the SB360 is 60V, but plenty of margin with both if you are using a 12V PSU.

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That's what we figured. Thank you, I'll go ahead and solder them on.

-Lars

I think it would be reasonable to annotate some parts with "any equivalent for X volts and Y amperes will do" on the parts lists, such as those diodes. There's usually bazillion viable replacements at a good electronics store for every other part, but without such information, a layman is not going to know if a part can be safely replaced with something a bit different.

(sorry for bumping an old-ish thread)
Would a [focus.ti.com] work for the diodes (note that these are offered as free samples )? I really don't know much about diodes, are the only two important specs the max inverse V and peak forward A? The UC3611 says 50V and 3A.

Edited 1 time(s). Last edit at 06/05/2009 02:42PM by nave.notnilc.

It most certainly should.

You need a diode with current rating of at least 2A (preferably 3A, just in case - one should not push electronic components to their limits) and voltage rating of 12V plus whatever back-EMF the motor could produce. 50V is good.

In a Schottky diode, the junction capacitance (and thus, the switching time) sometimes is of concern, too, but not in this case. For a stepper motot driven at a few hundred pps, any Schottky diode will do, as far as capacitance goes.

Edited 1 time(s). Last edit at 06/06/2009 08:01PM by Enleth.