What This 3-Position Micro-Fit 3.0 Receptacle Is
The Molex 0436450300 is a 3-circuit, single-row receptacle housing from the Micro-Fit 3.0 43645 series.
Contacts Are Ordered Separately — Here Is What Fits
This housing ships without contacts — the note "Contacts Not Included" on the listing is the first thing to check before adding to a BOM. You need the matching Micro-Fit 3.0 female crimp terminals, typically Molex 43030 or similar series, for 20-24 AWG wire. The crimp termination means you build the wire assembly first, then insert the terminated contacts into the housing until the retention tangs lock. The latch lock on the housing then secures the mated pair.