Siemens Varistor surge suppressor, 24 - 70VDCProduct Overview Varistor, 24 48 V AC, 24 70 V DC surge suppressor, for mounting to contactor Size S0, S2, S3 This compact varistor surge suppressor (Article Number: 3RT1926 1BB00) is designed for reliable protection of Size S0, S2, and S3 contactors against voltage transients and electrical surges. The device features voltage ratings of 24 48 V AC and 24 70 V DC, making it suitable for low voltage control circuit protection across a range of