ASCO Model 175 (Edco PC642 Series) Surge Protective Device
The Edco PC642 surge suppressor is a two-pair (four-wire) module implementing three-stage hybrid technology. This module addresses over-voltage transients with gas tubes and silicon avalanche components. In addition, sneak and fault currents are mitigated with resettable fuses (PTCs).
Notification Appliance Circuits
ASCO Model 172 (Edco PHC Series) Surge Protective Device
The Edco PHC Series is designed to protect two pairs of wires specifically for alarm and security systems where operating currents can be as high as 5 Amps. Electrically, the Edco PHC Series is a rugged series hybrid implementing a staged complement of MOVs, copper wound inductors and Silicon Avalanche Diodes. This design reduces series resistance to 0.2 Ohms per pair.
Post Indicator Valve Circuit
ASCO Model 151 (Edco FAS-1 & FAS-2) Surge Protective Device
The Edco FAS-1 and Edco FAS-2 are multi-stage single-pair or two-pair surge suppressors designed for high exposure applications. These products were specifically designed to meet multiple low voltage protection applications in the fire and security industries.