The 820524611 from Wurth Elektronik is a Disk Varistor. It has an AC voltage rating of 460 V, a DC voltage rating of 615 V, and a clamping voltage of 1240 V. This varistor can withstand a peak pulse current of 6500 A and has a power dissipation of 1 W. It has a reverse breakdown voltage of 750 V and an input capacitance of 520 pF. It offers excellent absorption of surge impulses and operates from -40°C to +105°C. This REACH/RoHS-compliant varistor is available in a through-hole package that measures 23 x 9.1 mm and is ideal for 12-48 VDC distribution and 110-400 V power supplies.