Footprint check: 0.156" pitch and 10 positions
The 1-640384-0: The 0.156" (3.96mm) pitch on this single-row header sets the board footprint spacing — it's the same pitch as the MTA-156 wire-to-board system, so the PCB layout matches the mating receptacle directly.
Unshrouded vertical orientation — what it means for assembly
On the harness floor, that means the operator needs a visual alignment cue or a jig. Vertical through-hole mounting keeps the pins perpendicular to the board.
RoHS compliant, UL94 V-0 rated housing.
Voltage and current — what drives the derating
Rated 600VAC — covers line-voltage control circuits and appliance power distribution without a secondary derating step. If the application sees frequent disconnect or corrosive atmosphere, a gold-plated sibling in the MTA-156 family would extend cycle life.