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 Regal Introduces
High Performance
RJ-45 Connectors
Santa Clara, CA — The new Series 152 Plus RJ-45 connectors from Regal are equipped with unique conductive gasketing, assuring a
reliable low impedance contact bond to the inner surface of the enclosure. This novel construction provides many mechanical and electrical advantages.
For the mechanical designer these connectors afford substantial relaxation with wider tolerances for the distance to the
opening and precise dimensions of the cutout to accommodate that connector. Even when the connector is slightly out of
alignment with the enclosure wall, the flexible gasketing will fill the voids and provide good connection over large surface area.
For the person concerned with the EMC performance the lower impedance between the connector and metal enclosure means
fewer problems with radio frequency noise generated inside the system, which would escape through the cable plugged into the connector.
RJ45 connectors are used in many applications, including computer networking. Practically every type of these applications
is associated with substantial levels of common mode interference, superimposed on the transmit and receive differential pairs
attached to the pins of the connector. Low impedance between the metal shell of the RJ45 connector and enclosure provides
the path for the interface currents to be shunted to the chassis. This impedance and the series impedance to the common
mode currents comprise a divider. The resulting common mode voltage developed across shunting impedance is applied to the
cable and causes emissions. The goal of the design is to reduce the amount of the interference voltage by keeping the
impedance between connector and chassis as low as possible. REGAL connectors are ideally suited to meet this requirement, by providing three sided conductive gasketing.
As data rates of the networking communication continue to rise, so does the level of internally generated interference. The
connector is the last link in the chain of preventive measures to keep the EMC interference within acceptable limits. The
importance of a reliable, low impedance between connector and enclosure is hard to underestimate. Regal's novel approach
successfully addresses this concern. Up to 10dB improvement in EMC performance over competitive metal tabbed only
connectors has been demonstrated on 8 Port units. These new units are easier to mount into existing designs and port openings, and expensive precision sheet metal cutouts are no longer required.
Price and availability on 4 Port units are $3.61 each, @ 5K quantity, from stock at Santa Clara, CA.
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For more information, contact:
Regal Electronics, Inc.
Connector Components Division
4251 Burton Drive, Santa Clara, CA 95O54.
Telephone: (4O8) 988-2288. Fax: (4O8) 988-2797.
E-mail: Hal@regalusa.com
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