The TPD6E004 device is a passive integrated circuit that triggers when voltages are above V_BR or below the diodes V_F of approximately –0.8 V. During ESD events, voltages as high as ±8-kV contact and ±12-kV air-gap ESD can be directed to ground through the internal diodes. When the voltages on the protected line fall below the trigger levels of TPD6E004 (usually within 10s of nano-seconds) the device reverts back to its high-impedance state.