Filter contact

Details Filter contact Filter contact

H - Electricity

01

R

333/66

H01R 13/66 (2006.01) H01R 13/719 (2006.01) H03H 7/01 (2006.01)

Patent

CA 2006757

FILTER CONTACT ABSTRACT OF THE DISCLOSURE A contact assembly for installation in an electrical connector, provides effective electromagnetic filtering in a simple, compact, and rugged construction that facilitates in-field replacement of a damaged contact assembly. The contact assembly includes a signal conductor, a diode for diverting high voltages on the signal conductor to ground, and a "pi" filter for filtering out unwanted frequencies. The "pi" filter includes a ferrite bead inductor coupled to the signal conductor and a first capacitor coupling a location of the signal conductor on a first side of the inductor to ground. The other capacitor of the "pi" filter is formed by the capacitance of the diode, with the diode connected to a signal conductor location on a second side of the inductor, and with the capacitance of the diode similar or equal to that of the first capacitor. The diode is mounted in a notch of the signal conductor, the ferrite bead inductor lies immediately forward of the notch, and the first capacitor lies immediately forward of the ferrite bead. A ground conductor has a sleeve portion that immediately surrounds both the first capacitor and the ferrite bead, and has a finger contacting the diode. Solder holds the finger of the ground conductor in place both mechanically and electrically. A quantity of epoxy fills the remaining notch area and forms the middle of the assembly with a cylindrical periphery to facilitate insertion and removal from a long narrow hole in the connector.

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