The recent posts about the overvoltage/transient suppressor discussion made me dig up the following link that I found a while ago - looks very promising for automotive protection of circuits.

http://www.automotivedesignline.com/showArticle.jhtml;jsessionid=ZTTET2TKQ1EKUQSNDLPSKHSCJUNN2JVN?articleID=192500568&queryText=load+dump

Hope this helps
Dom
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