Thomas & Betts' Joslyn AC surge protection devices have stainless-steel enclosures for corrosive applications, such as wastewater treatment facilities. They are suitable for protecting single, split and three-phase applications ranging from 120V to 600V Delta, and handling high-surge energy from 20 kA to 400 kA per phase. They are standard in Type 304 stainless steel, an alloy of iron, chromium and nickel.