Siemens 3TX4490-4H Description Description Siemens VARISTOR WITH LED X 3TF2/3TH2 Related products SIEMENS 1FK6032-6AK71-1TA0 SIEMENS 1FT5072-0AC01-0-Z SIEMENS 1FK7060-5AF71-1FH3 SIEMENS 1FK7042-5AF71-1EA0 SIEMENS 1FK7063-5AF71-1FG2 SIEMENS 1FT5066-0AC01-2-Z