d200mDITEK D200M-2774803YT ZEUS Series Surge Protection Module, 277480V. D200M-2774803YT | DK-D200M2774. Product Documents and Resources. Product Data Sheet.DITEK’s D200M Series offers facility-wide protection with replaceable modules and service assurance features for AC power systems. The series includes models for different service voltages, wiring types and phase confurations.