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 --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------