Q/QRL Quencharc® Arc Suppressor/Snubber Networks Cornell Dubilier (CDE) Q/QRL Quencharc® Arc Suppressor/Snubber Networks consist of a resistor and capacitor that effectively reduce voltage transients. These devices increase the operating life of switching components such as relays, contactors, and semiconductor switches. Cornell Dubilier Q/QRL Quencharc Arc Suppressor/Snubber Networks are suited for high voltage networks up to 1600VDC/660VAC with a variety of capacitance and resistor values to choose from at each voltage.