Pitch, position count, and contact side for BOM fit
The 5017865090 is a 50-position, 0.020" (0.50mm) pitch FFC connector from the Molex Easy-On 501786 series. The contacts are vertical and 1-sided — meaning the FFC cable must be inserted with the contact pads facing down toward the board. A flipped flex shorts the wrong row, so confirm the cable end type is notched and 0.30mm thick before assembly.
Rated for 20 mating cycles, this connector suits applications where the FFC is connected once and stays — a display ribbon in a fixed assembly, for example — rather than a frequent-service cable. The gold contact finish on copper alloy keeps contact resistance stable over those cycles. Current rating is 0.5A per contact at 50V. The narrow 0.50mm pitch limits current per circuit more than the contact itself; for higher-current signals, distribute across multiple adjacent pins or use a wider-pitch connector in the same family.