SIDACtor® SMA Series products are designed to protect baseband equipment, such as phones, fax machines, modems, line cards, CPE, and DSL, from damaging overvoltage transients. The series provides a surface mount solution that enables equipment to comply with global regulatory standards. Applicable Global Standards: TIA-968-A* TIA-968-B* ITU K.20/21 Basic Level GR 1089 Inter-building* IEC 61000-4-5* YD/T 1082 YD/T 993 YD/T 950 *Line impedance required to pass operationally.