Board-Mount Reality for a 50-Position 0.50mm Pitch Receptacle
The JST 50RF-JMCS-G-1-TF(N)(LF)(SN) is a 50-position, dual-row receptacle from the JMC series, built for dense board-to-FPC or board-to-board interconnects where every millimeter of PCB real estate counts. The 0.020" (0.50mm) pitch means the contact centers are tight — expect a narrow footprint that routes well with fine trace geometries, but the 0.130" (3.30mm) height above board gives enough clearance for passives under the mated pair.
Pitch, Positions, and What the Gold Means
At 0.50mm pitch and 50 circuits, this is a high-density interconnect. The gold contact finish is the right call here: tin would gall and wear after a few dozen cycles, but gold handles the hundreds of mates a test header or a field-swappable module sees. Surface-mount termination with solder retention means the part stays put through the reflow oven without tombstoning, and the tabs give the pads a mechanical anchor against the peel forces from an FPC being inserted and removed.