643265-7 is a single-row, 9-position shrouded header from the MTA-100 series, with 8 positions loaded. The friction lock holds the header to the mating receptacle without a secondary latch — enough for moderate vibration inside an enclosure, but not for a washdown zone where a full locking ramp is needed. Rated for 250VAC and current that varies by wire gauge, this header is a general-purpose board-to-wire interconnect for control panels, test equipment, and consumer appliances where the operating temperature stays between -55°C and 105°C.
8 loaded positions — confirm your circuit count
The header body has 9 pin cavities but only 8 are populated (vs). The empty position is typically the keying slot in the MTA-100 system — the mating receptacle has a matching polarizing rib that prevents reverse insertion. If your BOM calls for 9 circuits, this part leaves one pin open; you need the fully loaded 9-position version (base number 643265-8 or similar).
Mates with MTA-100 IDC receptacles (e.g., 640441 series) or crimp-type receptacle housings that accept 22-26 AWG wire. The through-hole solder termination means the header is wave-soldered to the PCB — no press-fit, no surface-mount. The 0.140" (3.56mm) post length is standard for a 1.6mm-thick board; check your board thickness if you're stacking multiple headers.