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I am not aware of any EU regulations relating to the use of tantalum capacitors, but that does not mean that they do not exist. Tantalum capacitors can overheat in certain conditions and, depending on the type of board they are mounted on, the flammability of any plastic materials nearby, board orientation, etc, this could cause a fire to start (i.e. overheat means HOT, not just warm). The conditions that instigate such failure mechanisms I am familiar with include reverse polarity, voltage spikes and leaving an insufficient margin between the rating of the device and the operating voltage of the circuit (a figure of 5x min comes to mind). It is now a year or two since I looked into this topic and things may have changed of course. As always, it’s a good idea to contact your supplier and ask for their advice. Regards, Richard Hughes This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. IEEE PSES Main Website: http://www.ieee-pses.org/ To post a message send your e-mail to [email protected] Instructions for use of the list server: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
