Siemens 3TX4490-4K Description Description Siemens VARISTOR WITH LED X 3TF2/3TH2 Related products SIEMENS 1FT5066-1AF71-4AA0 SIEMENS 1FK6042-6AF71-1TH0 SIEMENS 1FK7011-5AK71-1TG3 SIEMENS 1FK6060-6AF71-1TG0 SIEMENS 1FK7060-5AF71-1FH3 SIEMENS 1FK6042-6AF71-1TB0