The GD series, 80-120PSI air actuated, single pole/single or double throw switches can be water or oil cooled in some models. Available are maximum continuous ratings of up to 8000 amps continuous in air, higher with cooling or parallelling. Contact ratings reduced to 70% when parallelled. Extremely compact for their rating, this series is available in modular block form and can be stacked in parallel for increasing current handling capabilities. Many other models are available.