The FWA220018A-13B is part of the ICCNexergy line of industrial-grade surge protective devices (SPDs) designed to provide protection against damage caused by power spikes and surges. This specific model is a single-pole, 18-amp, 277VAC rated type 2 surge protector featuring built-in thermal overload protection. It is IP20 rated, allowing for protection against solid foreign objects larger than 12.5mm. It also features internal arcing and short-circuit protection, and is engineered with digital circuitry to provide superior performance. The device is rated to withstand a maximum surge current of 18 kA, and is designed to meet UL 1449 4th edition safety standards.