The TE Connectivity / AMP Brand part 1-770166-0 is a revolutionary and upgraded version of the original design. It features a stamped-out window on the terminal underside, completely eliminating the need for lances. This new design ensures a more secure and reliable connection, as the terminal slides over a locking tab within the housing cavity and produces an audible click, confirming that the terminal is fully seated.To further enhance the reliability of the connection, the contacts are secured by a secondary locking device. This is achieved by inserting a TPA retainer, which serves as a safeguard against the contacts backing out due to random vibrations. The TPA retainer is a recently added feature, and with the inclusion of 12-position breakaway style contact retainers, it provides exceptional stability and prevents any unwanted disconnections.Overall, the TE Connectivity / AMP Brand part 1-770166-0 sets a new standard in terminal design, delivering superior performance, heightened security, and enhanced durability. Trust in this advanced solution to ensure optimal connectivity in your applications.