Hi Steve, I believe according to UL, a class 3 medical device is a life support or life sustaining piece of equipment. Two examples would be a pacemaker and an incubator. As such the requirements of J-STD-001 or IPC-A-610 would dictate class 3 requirements for the circuit card assembly and the substrate to be designed IAW class 3 requirements of 2222 and fabricated IAW class 3 requirements of 6012. Please note that it is coincidence that all requirements are class 3 between IPC and UL. Steve Sauer Manufacturing Engineer Xetron Corporation Reference: One of our Sales persons has a customer inquiring if we can build a "class 3 medical" type board. Is this just a class 3 type board used in medical equipment, or is there a special category of boards out there classified as "medical?" ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################