The 91901-31125LF from Amphenol Communications Solutions is surface mount mezzanine connector, header with center strip contacts, 25 position, 2 rows and 0.039" (1.00mm) pitch. This is connector with solder retention and 0.034" (0.86mm) height above board. The 91901-31125LF has copper alloy contacts with 15.0µin (0.38µm) thick gold finish and natural color liquid crystal polymer (LCP) housing. Operating temperature range is from -55°C to +125°C.