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Voltage suppressor protects line cards with SSRs

Posted: 05 Feb 2003 ?? ?Print Version ?Bookmark and Share

Keywords:stmicroelectronics? ssrp105b1? transient voltage suppressor? asymmetric tvs? symmetric tvs?

The SSRP105B1 dual asymmetric transient voltage suppressor from STMicroelectronics is designed to protect line cards in telecom equipment that use solid-state relays (SSRs) instead of mechanical ring relays.

Available in an SO-8 package, the device helps equipment to withstand damage caused by lightning surges and power-cross situations. It is able to withstand currents of 50A for 5?s to 310?s and 35A for 10?s to 10ms, exceeding the levels required by the ITU-T K20/21 and GR1089 standards.

Other features include the ability to handle asymmetric voltages between line and ground of 105V and -180V, as well as a symmetric voltage between line and line of 180V.





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