Varistors from EPCOS include SIOV Metal Oxide Varistors and Transient Voltage Suppressors as well as ThermoFuse Varistors. They are voltage-dependent resistors with symmetrical V/I characteristic.
VARISTOR, HOUSED, 275V, 10%; Series:AdvanceD; Varistor Type:Metal Oxide Varistor (MOV); Peak Surge Current @ 8/20µs:6kA; Varistor Case:Disc 14mm; Clamping Voltage Vc Max:710V; Peak Energy (10/1000uS):110J; Voltage Rating V DC:350V; Operating Temperature Min:-40°C; Operating Temperature Max:85°C; SVHC:No SVHC (20-Jun-2013); Operating Temperature Range:-40°C to +85°C