The FS32 surge protection device prevents surges and transient over-voltages conducted along the Trunk or Spurs of fieldbus systems from damaging the associated electronics such as terminators, spur blocks and the bus control equipment. Designed to fit our latest fieldbus products in order to protect spurs, the FS32 can also be used to protect spurs on Megablock wiring hubs. This space saving design helps to reduce the size of junction boxes and ease installation. In operation the FS32 does not adversely affect the performance or operation of the fieldbus or connected equipment. It allows signals to pass with little attenuation while diverting surge currents safely to earth (ground) and clamping output voltages to safe levels.