The JST PNIRR-04VF is a 4-position, single-row receptacle housing from the PNI series, designed for free-hanging (in-line) wire-to-wire or wire-to-board interconnects. It accepts male pin contacts (sold separately) and uses a latch lock to secure the mating half — a friction-only mate won't hold under vibration, so this latch is what keeps the pair together in a harness that sees road buzz or machine shake.
Position Count and Sibling Comparison
At 4 positions, the PNIRR-04VF sits between the 3-position PNIRR-03VF and the 8-position PNIRR-08VF in the same PNI series. The 3-position sibling saves one cavity but won't fill a 4-wire harness; the 8-position version adds four extra cavities that would need to be populated or left empty, which risks terminal retention issues in unused positions.
Contacts Are Not Included — What You Need to Order Separately
The listing explicitly notes contacts are not included. This housing accepts male pin crimp terminals — you'll need to source the matching JST PNI series crimp contacts separately. The crimp termination requires a compatible hand tool or automatic press; the terminals are inserted into the housing cavities and retained by the latch lock once mated. Without the contacts, this is just an empty shell — make sure the BOM includes the terminal part number before assembly.