d200mDITEK D200M-1202401 Modular Surge Protective Device, 200kAPhase, Protects 120240VAC Split Phase Panels. D200M-1202401 | DK-200M1201. Product Documents and Resources.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.