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SGT50-25 Din Mount Spark Gap L-N, L-E protection, 240VAC Nominal, 50kA 10/350μs
SG60 Din Mount Spark Gap L-N, L-E protection, 440VAC Nominal, 60kA 10/350μs
NE100 Din Mount Spark Gap N-E protection, 240VAC Nominal, 100kA 10/350μs