CST-100 II Receptacle Housing, 12 Circuits
The 1-1375820-2: It's a single-row, free-hanging (in-line) housing designed for crimp termination — you bring your own female socket contacts, as the listing clearly notes contacts are not included.
Mating and Contact Selection
The crimp termination allows you to terminate discrete wires (typically 22-28 AWG for this series) and insert them into the housing cavities, where the locking ramp also acts as a terminal retention feature.
Procurement Note
Because the contacts are not included, factor the cost and lead time of the matching crimp terminals into your BOM line. No minimums beyond the reel or bag count, but small quantities (under 100 pieces) may carry a handling premium. If you're comparing the 1-1375820-2 to the 1375820-2, they are the same TE base product; the '1-' prefix is a distributor catalog variant and does not affect fit, form, or function.