The Han-Eco Series from HARTING is a robust connector series you can consider for higher contact density application. It’s comprised of Modules,
which are designed to retain the Han-Eco “click and mate” snap-in function, screw termination style and completely tool-free mounting for the insert.
You can review the installation methods for these connectors in this video: Han-Eco® - A light weight electrical connector
Han-Eco Monoblocks is the panel connector assembly kit set which includes the male/female modules and side-hood / bottom base.
