Siemens 3TX4490-4K Description Description Siemens VARISTOR WITH LED X 3TF2/3TH2 Related products SIEMENS 1FK7063-5AF71-1FG2 SIEMENS 1FT5072-0AC01-0-Z SIEMENS 1FK7060-5AF71-1FH3 SIEMENS 1FN1910-0AA20-3AA0 SIEMENS 1FT5066-1AF71-4AA0 SIEMENS 1FN3050-4SA00-0AA0