Sidactor Protection Thyristor Products Page 30 SIDACtor Protection Thyristor Products

SIDACtor Protection Thyristors 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/17 Regulatory Requirements TIA-968-A Telecommunications - Telephone Terminal Equipment - Technical Requirements for Connection of Terminal Equipment to the Telephone Network, is valid for approvals until March 22, 2011 when it will be superseded by TIA-968-B. Until March 22, 2011, users may cite either TIA-968-A, along with its addenda, or TIA-968-B. TIA-968-A replaced FCC Part 68 with the exception of hearing aid compatibility (HAC), volume control, and indoor cabling. TIA-968-B now in turn replaces TIA-968-A and its A1,A2, A3, and A4 addenda. This new version is closely harmonized with the Canadian CS03 requirements. Continued efforts between TIA TR41 and Industry Canada will continue these harmonization efforts. Various countries around the world also recognize this USA standard and use it either wholly or in part for their telephone terminal equipment programs. GR 1089 is a standard generally supported by the US Regional Bell Operating Companies (RBOCs). It is updated by Telcordia Technology (formerly Bellcore). The RBOCs typically require compliance with GR 1089 for any of their telecom purchases. GR-1089 Issue 6 is the most recent update as is expected to be published March 2011. The ITU is a specialized agency of the UN devoted to international harmonization. Most European countries recognize the ITU standards. CNET is the Centre National d'etudes de Telecommunications, a French organization. VDE is the Verband Deutsher Elektrotechniker, a Federation of German electrical engineers. VDE is very similar to the IEEE (Institute of Electrical and Electronics Engineers) but is national in scope rather than global. ANSI is the American National Standards Institute, which is a non-government organization. The British equivalent to this is BSI. IEC is the International Electrotechnical Commission, a result of Europe's move toward a single market structure and its drive to formalize and harmonize member countries' requirements. FTZ R12 is a German specification. Mainland China publishes various technical requirements and test methods for protection of telecommunication equipment, terminal equipment, and access network equipment. Some of these standards are based on ITU-T Recommendations. Type testing, factory inspection and follow-up factory inspection procedures similar to those imposed by UL within the USA, are also required in China. The following page contains Table 3.1, which shows in its far right most column the recommended SIDACtor device surge rating (A, B, or C) that is required to comply with each specific waveshape definition without the need of additional limiting resistors. Surge Waveforms for Various Standards

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