This document discusses protection methods for SCRs, including overvoltage, overcurrent, dv/dt, and di/dt protection. It explains that dv/dt protection is needed to prevent false triggering of the SCR from high rates of change of the anode-cathode voltage. This is achieved using an RC snubber network across the SCR. It also notes that SCRs generate heat from current conduction, so a heatsink is required to dissipate this heat and prevent failure.