MSFK B441/1/200/RT is part of Schützinger's series of surge protection components, which are designed to protect electronic circuits against overvoltage transients. It is a high-performance, quick-response component that is designed to protect against lightening and other transient overvoltages. The device is made up of a varistor core, which is composed of a zinc oxide ceramic material, with a coloured, epoxy resin casing. This casing allows it to be used in both indoor and outdoor applications, as well as providing additional protection against weathering and corrosion. The varistor core also features a high SCCR rating, which ensures that the device is able to withstand large surges of current. Additionally, the device has a wide operating temperature range, meaning that it can be used in both cold and hot environments.