The D Series are solid state analog flashing devices. No moving parts to wear out. 2 amp rating. Output: AC units — TRIAC; DC units — transistor. Compact size. 3-terminal configuration. No current leakage to load. Fixed flash rates. Duty Cycle: 50%. UL File #E96739(M). CSA File #LR62586. Operating Temperature Range: –23°C to +60°C. Mounting: Single screw or optional 2 screw panel mount.