FX23 0.High Speed 5mm Pitch Floating Connectors Hirose Electric FX23 High-Speed 0.5mm Pitch Floating Board-to-Board Connectors support high current ratings and high-speed transmission of up to 8Gbps (maximum). The FX23 components feature a hybrid power/signal contact structure and an innovative contact design that ensures impedance matching. Four built-in power contacts carry up to 3A current rating each, while the signal contacts can carry 0.5A each.