The TE Connectivity 118982-1 is a keying plug (intercontact) for the Economate series of connectors. It is a black, glass-filled thermoplastic accessory that inserts between contacts in the mating interface to prevent mismating of connector pairs with different circuit arrangements. This plug does not carry current — its sole job is mechanical polarization, ensuring only the correct receptacle mates with its intended header.
Construction and Material
Molded from black glass-filled thermoplastic, the 118982-1 offers the dimensional stability and heat resistance needed to survive reflow or wave-solder assembly of the header it keys. The glass fill also provides the stiffness to hold the keying position under repeated mating cycles without creep or deformation.