Board-Fit Check: Pitch, Positions, and Orientation
The 6-520314-2: With 12 positions, this part fits signal bundles that need a dozen lines, not a full-width ribbon.
Current and Contact Life — Signal Duty Only
In a product that sees quarterly rework, that is about six years of service before contact resistance starts climbing. The FFC thickness range of 0.13 mm to 0.38 mm covers standard 0.3 mm flex circuits and thinner polyimide tails. If your cable is outside that range, the contact beam won't grip properly — the connection will be intermittent or the insulation will pinch.