Industrial Type—acts as power control center with one or more (depending on the model) ON/OFF switch and indicator light combinations. Hospital Group/High-Abuse Model—designed for special safety requirements or corrosive environment. Made with UL hospital-grade components. Transient Surge Suppressor—provides three-line surge protection and noise filter. Fail-safe circuit with automatic shutdown if suppressor element fails. Rated at 400V. Electrically grounded cases.