Part Marking Information www.vishay.com Vishay Siliconix Devices: PowerPAK® SO-8, PowerPAK SO-8L PowerPAK 1212-8, PowerPAK 1212-8S, PowerPAK 1212-8W PowerPAIR® 6 x 3.7, PowerPAIR 6 x 5, PowerPAIR 3 x 3 Single and Dual 7401 LL TYWF 7401 = Example Base Part Number or marking code a = Siliconix Logo = Lot Code = ESD Symbol = Pin 1 Indicator T = Assembly Factory Code Y = Year Code W = Week Code F = Wafer Fab Code LL The current marking strategy is reflected. Contact your local sales representative for historical marking strategies for these packages. Note a. These digits will be a code, if indicated on the datasheet. Otherwise, the digits will be the base number like indicated in the example. Revision: 08-Jun-15 1 Document Number: 72758 THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000