WR Board-to-Board Connectors JAE Electronics WR Board-to-Board Connectors feature a ribbon contact design on 0.5mm (0.020') centers with nine varieties (4mm to 9mm) of parallel board-to-board distance. These low-profile, high-density connectors are ideal for right-angle / parallel board-to-board connections. Metal hold-downs on both ends of the right-angle type prevent floating up during automatic mounting, and the PCB area beneath the insulator may be used for circuit traces. Applications for JAE Electronics WR Board-to-Board Connectors include camcorders, cellular phones, notebook PCs, and other equipment that requires high-density packaging.