Harwin 1.25mm Gecko Series Through Hole Mount PCB Headers These Gecko series 1.25mm pitch wire to board PCB through hole mount headers have a dense 1.25mm pin spacing and a low profile miniature design offering both high performance, reliability and PCB space saving. Gecko PCB headers with part number G125-M XX XX 05 L1 have latches to provide a secure connection to the mating connector. All these Gecko PCB headers have retention barbs to fix the connector securely to the PCB for through hole mounting. These 1.25mm Gecko headers also feature polarization for accurate mating alignment and can withstand extreme temperatures from -65 to +150°C.