Omron B3F Series Tactile Switches Manufacturer has advised effective as of July 2010 production, plunger materials will change for most of the B3F-1000 series, with the following exceptions: B3F-1060 : Effective as of production in January, 2011 B3F-1062 : Effective as of production in September, 2010 This measure was taken to improve heat resistance tolerance of the plunger at current soldering conditions. Note: neither soldering condition nor product specification change. Material of plunger before: PPO Resin Material of plunger after: PBT Resin Please check specifications to assure new part can be used in application. Affected Part Numbers 653-B3F-1000 653-B3F-1002 653-B3F-1002-G 653-B3F-1005 653-B3F-1006 653-B3F-1050 653-B3F-1052 653-B3F-1055 653-B3F-1060 653-B3F-1062 653-B3F-1100 653-B3F-1102 653-B3F-1102-G 653-B3F-1105 653-B3F-1150 653-B3F-1152 653-B3F-1155 653-B3F-3100 653-B3F-3102 653-B3F-3105 653-B3F-3150 653-B3F-3152 653-B3F-3155 653-B3F-6000 653-B3F-60023 653-B3F-60203 653-B3F-60223 653-B3F-61003 653-B3F-61023 653-B3F-6120 Please contact a Mouser Technical Sales Representative for further information. 5-0810-28