Yes, that is correct. Refer to table 4-1, 2nd row "Vertical fill of solder" lists 75% fill minimum for Class 2 and 3. Row 1 "Circumferential wetting - primary side - lead and barrel" is the definitive factor; 180 degrees is required for class 2, 270 degrees is required for class 3. You difficulty will be in viewing the space between the lead and the barrel to ascertain the minimum wetting. Jack Jack Crawford, IPC Project Manger - Assembly 2215 Sanders Road, Northbrook IL 60062-6135 [log in to unmask] http://www.ipc.org 847-509-9700 x 393 fax 847-509-9798 >>> "Gustafson, Steve @ CLW" <[log in to unmask]> 03/10/98 05:52AM >>> We are currently have a problem with a customer on the requirement interpretation of section 4.1 of ANSI/IPC-A-610, revision B(for class 2 and 3). With respect to the vertical fill of solder, is it acceptable for the solder to not reach the top edge(entire 360 degrees) of the plated through hole on the primary side of the assembly, as long as the wetting requirements are met? ################################################################ TechNet E-Mail Forum 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://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################ ################################################################ TechNet E-Mail Forum 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://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################