The latch lock snaps onto the mating header and holds under light vibration, common in consumer appliances, automotive interior modules, and industrial control panels. The operating range covers most indoor and under-dash conditions but does not extend to engine-bay or outdoor washdown duty.
Why the 'Contacts Not Included' Note Matters
This is common across the SM series; the housing alone is the carrier, and the buyer selects the appropriate male pin terminal based on wire gauge and plating requirement. For a 3-circuit harness, you will need three crimp contacts (typically JST SM series pins, 20-24 AWG range) and a compatible hand or automatic crimp tool. Ordering the housing without the terminals is the most common sourcing mistake on this part.