Hey Dave,
I have to concur with Brian's reasons.  Have you thought about using PTC
(positive thermal coefficient) devices made by Raychem and Panasonic?
These devices are self-resetting, and may work well in your application.
Only drawback is the SMD versions are only good to 30 or 40 VDC or so at 2
or 3 amps.  Only other truly reliable (and repeatable) way to provide
circuit protection is with a fuse per your suggestion.
Regards,
Roger M. Stoops, C.I.D., PCB Designer


Trimble
Engineering and Construction Division
5475 Kellenburger Rd.
Dayton, OH 45424-1099 USA
Ph: +01 937.233.8921 or +01 937.233.4574 ext 288
Fax: +01 937.233.7511


Spectra Precision is now
part of the Trimble Company



                    "Hipp, Dave
                    HS-SNS"              To:     [log in to unmask]
                    <dave.hipp@HS        cc:
                    .UTC.COM>            Subject:     [TN] Fusible links
                    Sent by:
                    TechNet
                    <[log in to unmask]
                    ORG>


                    12/08/00
                    07:34 AM
                    Please
                    respond to
                    "TechNet
                    E-Mail
                    Forum.";
                    Please
                    respond to
                    "Hipp, Dave
                    HS-SNS"





Good day,
Can you please point me to web sites dealing with fusible links on printed
wiring boards? I am really interested in current (no pun intended)
applications or DOE results.
We want to use this technology in our next product (secondary power
distribution on commercial aircraft) and I need to get up to speed.
We are currently designing a DOE board with various neck down widths and
lengths. With some lessons learned, maybe we can whittle down the number of
experiments.
Other ideas we're investigating are short pieces of wire (manufacturing
doesn't like that) and very small SMT fuses.


Regards,
Dave Hipp
Project Engineer - Common SPDA
Business and Regional Jet Enterprise
Hamilton Sundstrand Aerospace
815-226-6183   FAX: 815-226-6748

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