Hi Eric!

In the past I've had it both ways, one large military customer we had
says that a "better than" part was okay to use, and gave us a blanket
okay for that. But then another of our military customers wanted to know
of ANY suggested substitutions to the BOM and then give the
authorization whether or not to use, which is fine.

The important thing is make sure that your buyers know that. A lot of
them are used to buying "better than" parts routinely. At a past company
that I worked at we got spanked pretty badly by one of our customers for
buying better parts without asking first...

-Steve Gregory- 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of ekalgren
Sent: Friday, January 05, 2007 11:41 AM
To: [log in to unmask]
Subject: [TN] Resistor Substitutions

Good afternoon everyone.  I hope your new year is going well so far.  I
just got off the phone with our folks in purchasing who were telling me
that there was a 13 week lead time for a resistor.  I checked a few
places on-line and was able to find a better (in terms of failure rate)
resistor in stock.  

 

My question is does anybody working with mil spec components have a
blanket substitution policy along the lines of "S or T failure rates can
be used in place of R failure rates without engineering approval" or do
you require approval for every sub?

 

Eric Kalgren

Electrical Engineer

Cobham Defense Electronic Systems
Continental Microwave Division
11 Continental Drive
Exeter, NH  03833  USA
Tel:  603-775-5200
Fax: 603-775-5201
E-mail:[log in to unmask]  
Website:   <http://www.cobhamdes.com/> http://www.cobhamdes.com

 <mailto:[log in to unmask]>  

 


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