The DTK-DF120S1, recommended for Fuel Dispenser (AC) protection, is a series connected Surge Protective Device with a replaceable surge module (DTK-DF120M).
The LED indicators on the top face of the module provide power, ground and module health status. When the DTK-DF120M surge module has gone end of life, the large "REPLACE" RED LED will illuminate and the "GOOD" LED will turn off.
Also, the audible alarm will sound to provide an extra alert as to the surge module's health.
The DTK-DF120S1 sets a new standard for 120V AC power surge protection. Its patented design provides maximum critical load protection by minimizing AC supply voltage spikes and isolating incoming surges that originate from lightning or other sources.