The TE Connectivity 1650681-1 is an insert — the replaceable contact carrier — within the DOMINO and Elcon series of modular power interconnects. It holds the power contacts in the housing and is the piece you swap when a contact wears or the circuit configuration changes, rather than replacing the whole connector assembly. The insert is the interface between the crimped terminal and the housing cavity, and its fit is specific to the DOMINO/Elcon cavity geometry.
Sourcing Reality
The base product number is 1650681; the -1 suffix is the specific variant within that base.