This document summarizes the specifications and features of the PSP 250 surge protection device. The PSP 250 is a Type 2 surge protection device that provides high to low exposure level protection for service entrance, feeders, main panels, sub panels, and distribution panels. It has a peak surge current capacity of 250kA per phase and can suppress voltage surges and transients from various sources. The PSP 250 has features like threshold tracking filtering, bidirectional clamping capability, and a thermal heat sink encapsulation for long-term performance.