The Molex 50-57-9509 is a 9-circuit, single-row crimp housing from the SL (Stackable Linear) interconnect system. The description 'SL CRP HSG H SR 9CKT OPT H' confirms it accepts standard SL crimp terminals and includes an optional polarizing key (OPT H) for keying against mismated headers. This housing is designed for wire-to-board applications where a reliable, polarized connection is needed in moderate-density harnesses.
Housing Construction and Fit
The optional polarizing key prevents incorrect insertion — useful in multi-connector panels where identical-looking housings could be swapped. The crimp terminals (sold separately) are inserted from the rear and retained by a positive lock. The housing is ROHS3 compliant, meeting current EU and global environmental requirements for electronic assemblies.