A surge protector includes a housing defining a cavity and having an axis. The surge protector also includes first and second center conductors positioned within the cavity at the axial ends of the housing. The surge protector also includes an inner coupler positioned within the cavity, having a center portion, and being coupled to the first center conductor. The surge protector also includes an outer coupler positioned within the cavity, having an inner surface that defines a volume for receiving a portion of the center portion of the inner coupler, and coupled to the second center conductor. The surge protector also includes a first dielectric material positioned between the center portion and the inner surface. The surge protector also includes a first spiral inductor positioned within the cavity, having an outer curve and an inner curve, and being coupled to the first center conductor or the second center conductor.