An apparatus for transceiver signal isolation and voltage clamp from transient electrical events includes a bi-directional protection device comprising a bipolar PNPNP device assembly, a first parasitic PNPN device assembly, and a second parasitic PNPN device assembly. The bipolar PNPNP device assembly includes an NPN bi-directional bipolar transistor, a first PNP bipolar transistor, and a second PNP bipolar transistor, and is configured to receive a transient voltage signal through first and second pads. The first and second pads are electrically connected to the PNPNP device assembly through emitters of the first and second PNP bipolar transistors. The bipolar PNPNP device assembly is electrically connected to a first parasitic PNPN device assembly comprising a parasitic PNP bipolar transistor and a first parasitic NPN bipolar transistor. The bipolar PNPNP device assembly is further connected to a second parasitic parasitic PNPN device assembly comprising the parasitic PNP bipolar transistor and a second parasitic NPN bipolar transistor. The base of the parasitic PNP bipolar transistor is connected to the substrate of the transceiver through a resistor to prevent triggering and breakdown of the first and second parasitic PNPN device assemblies.