The 820542511 from Wurth Elektronik is a Disk Varistor. It has an AC voltage rating of 250 V, a DC voltage rating of 320 V, and a clamping voltage of 650 V. This varistor can withstand a peak pulse current of 4500 A and has a low power dissipation of 0.6 W. It offers excellent absorption of surge impulses and operates from -40°C to +105°C. This RoHS-compliant varistor is available in a through-hole package that measures 45 x 16.5 mm and is ideal for 12-48 VDC distribution and 110-400 V power supplies.
