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Active standard | Published: 01/05/2026
STN EN IEC 61643-21
Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Requirements and test methods
Available languages: English
Available design: Print design
Detail information
Designation: STN EN IEC 61643-21
Publication date: 01/05/2026
Pages: 0
Country: Slovak technical standard
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