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Overview IEC 61249-2-53:2025 defines requirements for PTFE unfilled reinforced laminate sheets, copper-clad, intended for printed boards and other interconnecting structures. The standard covers copp…
1 Scope This part of IEC 61249 specifies requirements for properties of PTFE unfilled reinforced laminated sheet of a thickness 0,05 mm up to 10,0 mm of defined flammability (vertical burning test),…