TE Connectivity Power Triple Lock Contacts A range of tab and receptacle contacts for use in Power Triple Lock plug and receptacle connector housings. The PTL (Power Triple Lock) plug housings accept receptacle contacts and the PTL receptacle housings accept tab contacts. These Power Triple Lock connector contacts are made from copper alloy with a pre-tin plating and are available in a range of wire sizes. Versions are also available with a high temperature rating of 150°C.