Polarised and keyed connectors reduce the possibility of misalignment


Molex’s FiT families power connectors are polarised and keyed to virtually eliminate misalignment and significantly reduce the number of errors associated with improper installation. In the event an operator attempts to mis-mate a FiT families connector, the connector will provide tactile feedback to indicate the mating error to the user.


Polarised and keyed Micro-Fit 3.0™ housing


Polarising Features


Keying features


Through multiple points of contact, redundancy is achieved during all connections


Terminals in Molex’s FiT families feature multiple points of contact, so in the event that one part of the contact degrades or becomes blocked by debris, the other points of contact continue to carry the load. As a result, terminals have redundancy and a higher current carrying capability. Within the FiT families, the Mega-Fit®


and Ultra-Fit™ Power


Connectors utilise these multiple points of contact to enable their hot plugging capability. Hot plugging allows the Mega-Fit® and Ultra-Fit™ Power Connectors to be mated/ unmated without having to turn off the power source.


KK® Terminal with 1 point of Contact


Multiple points of contact vs a single point of contact


Ultra-Fit Terminal with 6 points of contact


Reflow capable headers reduce processing requirements and reduce costs


Molex’s FiT families feature reflow capable headers molded in liquid crystal polymers (LCP) that can withstand +260°C and higher during reflow processing. These connectors are designed to be automated assembly–ready, which can optimise installation times, reduce human error and save significant processing costs. With secondary wave solder processes being used less often or eliminated, reflow capable connectors like those offered in the FiT families meet processing requirements that can result in significant cost savings.


Avoid damage associated with reflow processes on non-reflow components


Undamaged in reflow process


Damaged in reflow process


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