STC-SLAC Series surge protection devices are specifically designed to protect electronic instruments used by the water/wastewater industries. It combines hybrid AC power protection and signal line protection in a NEMA 4X polycarbonate case. The AC power suppressor can supply up to 1,875 Watts and has a 15 Amp replaceable fuse to prevent overloading of the protective elements. A “Power On” LED provides visual indication that power is applied to instruments.