P.O. Box 14460 St. Louis, MO 63178-4460 114 Old State Road Ellisville, MO 63021 Phone: (636) 527-3877 Date: February 5, 2009 To: S505 Customers Subject: S505 Product Change Notification To continuously improve our products and processes, Cooper Bussmann has made some modifications to select ratings within the S505 fuse line. Over the next couple of months there will be a transition to the new design. There will be no changes to voltage ratings, interrupting ratings or max/min opening times. Changes in timecurrent characteristics are minimal. A new datasheet reflecting these changes is now available online at www.cooperbussmann.com/datasheets/elx. New material declaration and engineering documents are available upon request. Fuse dimensions remain the same for all part numbers without axial leads. For fuses with axial leads (part numbers containing "-V"), some ratings will be fitted with larger diameter leads. Lead diameter for S505-V-4-R (all prefixes), and S505-V-5-R (all prefixes) has increased from 0.65mm to 0.81mm. Thank you for your business and your cooperation with this transition. Michael Guo Product Manager, Electronic Circuit Protection For Latest Data On The S505 Series, See Data Sheet 2037 For Latest Data On The S505 Series, See Data Sheet 2037