The ABB RV5/440 is a varistor surge suppressor designed to reduce the maximum overvoltage peak value and to limit or even completely eliminate the high pre-damping voltage frequencies, when used with an AC operated conventional contactor for a rated control circuit voltage between 250 to 440 V AC 50/60Hz or with a DC operated conventional contactor for a rated control circuit voltage between 250 to 440 V DC.

It has high energy absorption
Operating temperature -20 to +70 °C
It has 30.25 x 10.5 x 32.4 mm dimensions