Molex is actually a brand name, it’s a company that makes inexpensive nylon plastic-bodied connectors.
They are generally used for internal connections in electronic equipment. It plays a role in connecting components. It can be mounted on the ends of multiple wire bundles or on PCBs by soldering.
Its Pins and sockets are made of inexpensive stamped steel and brass. It can be crimped rapidly by semi-automated machinery to wire ends so as to insert into the mating connectors, soldered and PCB.
Read More: A Beginner’s Guide to SMD Components