Siemens 3TX4490-4H Description Description Siemens VARISTOR WITH LED X 3TF2/3TH2 Related products SIEMENS 1FN3150-4SA00-0AA0 SIEMENS 1FK7083-5AF71-1EB3 SIEMENS 1FN1910-0AA20-3AA0 SIEMENS 1790L811A SIEMENS 1FN3050-4SA00-0AA0 SIEMENS 1FK7103-5AF71-1DH0