An isolator in accordance with aspects of the present disclosure provides EMI filtering, ground coupling, and/or surge protection, which can protect a PCB housed within the isolator. In some implementations, the PCB can be a coaxial PCB, which can be connected within the isolator during assembly solely by compression fitting (e.g., without additional attachments, such as solder or adhesive). Additionally, because the PCB includes a coaxial design, space utilized by the coaxial PCB in the isolator is reduced. Further, in some implementations of the isolator, the coaxial PCB can provide ground connections between two isolated cavities. Moreover, in some implementations, the isolator includes an RF filtering cavity surrounding the coaxial PCB and one or more toroids to filter RF signals to reduce EMI.

According to additional aspects of the present disclosure, the isolator can include an insulating grip formed on an exterior of the isolator. The insulating grip can be formed of an insulating sleeve that surrounds an exterior portion of the isolator. The insulating grip can provide electrical shock protection for a user, for example, an installer, handling the isolator. The insulating grip can also provide protection against shorting two insulated sides of the isolators for additional safety to hardware coupled to the isolator. Additionally, the insulating grip can include raised members that provide friction and improve handling and installation. Further, the insulating grip can provide improved aesthetic design for the isolator by providing colors and patterns to an exterior of the isolator.