TE Connectivity MCP 2.8K Tab Timer Contacts with Single Wire Sealing System (SWS) MCP 2.8K tab timer contacts with single wire sealing system (SWS) and modified symmetric steel cantilever spring. These MCP 2.8K tab timer contacts have a mating interface area of 2.79 x 0.81mm and mate with the MCP 2.8/2.8K contact system but can also be used with the Junior Power Timer connector system.