Hi Chris, In answer to your question, I would think not.
Whatever you use you must consider the single fault condition of the component bridging the input and ground, e.g. short. Also consider other aspects like the material flammability rating. One nice thing about "approved" caps is that most if not all, the safety issues are already addressed. If it is a low volume product you might well consider just using these "approved" components, but for high volume, where the great big dragon called Cost* is breathing fire, you may want to look at the alternatives. Is component size an issue? Enci * Also known as: The Boss, Accountant, Bank Manager, Customer..... :) At 14:49 15/11/01 -0000, Chris wrote: > >Hi Group, > >I have one of those scenarios where EMC meets product safety. >For the purpose of RFI, I have a requirement to connect RF bypass >capacitors from the input lines of a Low voltage DC (30V max, SELV) >piece of equipment to PE. As I recall when I worked in ac voltage >converters, we used to connect Y-rated capacitors between phase >and PE. > >Is it still a requirement that I need a Y-rated capacitor for this LV product >or can I get away with a much smaller capacitor with a varistor in parallel? > >All comments welcome. I trust the wording is clear but please let me know >if a sketch in word is required. > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [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: No longer online until our new server is brought online and the old messages are imported into the new server.
