The ALPU-90V surge suppressor is a high-speed, high-current solid state device that is designed to protect (2) 55VDC Ethernet CAT-5 communication pairs, (1) 55VDC pair, (1) 55VDC Reset Wire and (1) 55VDC LED Signal wire. The ALPU-90V utilizes an effective two-port network with sneak current and PTC fusing with silicon avalanche suppressor diodes (SASD) to meet the requirements of UL497B. It connects to the service in a dedicated “clean” and “dirty” pass-through configuration. All input and output connections terminate at 11 O-style IDC connectors. Both the input and output cable harnesses pass into the suppressor housing via waterproof strain reliefs. The suppressor is housed in a molded plastic enclosure that is designed to meet NEMA 3R.