Catalog > Passive Components > Resistors > ZOV (MOV) Zinc Oxide MOV Metal Oxide Varistor Zinc Oxide MOV Metal Oxide Varistor ZOV40D821K MOV 40MM 510VAC-RMS 670VDC 1080J-10/1000us Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview ZOV varisotrs are nonlinear 2-electrode semiconductor voltage-dependant resistors, which are designed for transient voltage suppression and surge energy absorption. Features Large absorbing transient energy capabilityVery short response timeLow Clamping ratio and no follow-on currentHigh resistance Insulation Material prevents the electric arching to the adjacent devices Additional Information Size 40mm Max Allowable ACrms Voltage (V) 510V Max Allowable DC Voltage (V) 670V Varistor Voltage @1mA (V) 820V Max Peak Current @8/20uS (A) 40000A Max Energy 10/1000 uS (J) 1080 Typical Capacitance @ 1kHz (pF) 2090F