The SPD2-350-4P0-R from Littelfuse is a Surge Suppression IC that has been designed to provide equipment protection from transient over-voltage events that last in the range of microseconds. It requires an input voltage of up to 350 V and has a current rating of less than 50 kA (IEC standard) and 200 kA (UL standard). This IC can clamp and withstand high-energy transients, ensuring low residual voltage during surge events. It offers a higher nominal discharge current to prevent equipment disruption, downtime, and degradation. This IC includes an interlocking tab mechanism that secures the module against vibration while eliminating the need for additional over-current protection devices in UL applications reducing component count and costs.

This surge suppression IC incorporates a visual life indicator that allows quick status checks for module replacement to maintain protection, and pluggable modules enable fast, tool-free replacement, minimizing maintenance and downtime. It features thermal protection preventing catastrophic failure, and the IP20 protection rating ensures a finger-safe design, enhancing worker protection. It is available in a DIN rail-mount package that measures 90 x 72 mm and is ideal for power distribution, and industrial applications.