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Low-voltage surge protective devices - General Requirements and test methods. Original standard BS EN IEC 61643-01-2025 + A11-2025 in PDF full version. Additional info + preview on request

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Components for low-voltage surge protection - Performance requirements and test methods for metal oxide varistors (MOV). Original standard BS EN IEC 61643-331-2020 in PDF full version. Additional info + preview on request

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Components for low-voltage surge protection - Selection and application principles for metal oxide varistors (MOV). Original standard BS EN IEC 61643-332-2024 in PDF full version. Additional info + preview on request

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Components for low-voltage surge protection - Performance requirements and test circuits for thyristor surge suppressors (TSS). Original standard BS EN IEC 61643-341-2020 in PDF full version. Additional info + preview on request

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Components for low-voltage surge protection - Selection and application principles for telecommunications and signalling network surge isolation transformers (SITs). Original standard BS EN IEC 61643-352-2018 in PDF full version. Additional info + preview on request

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Medical electrical equipment. Dosimeters with ionization chambers and/or semiconductor detectors as used in X-ray diagnostic imaging. Original standard BS EN IEC 61674-2024 in PDF full version. Additional info + preview on request

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