260330 - 5-Pin Surge Protection Module - Solid State (4B3S-75) 75V W/PTC

The asymmetrical operation of the 5-pin solid state module is designed to be "always on" protecting the telecom infrastructure. It is suitable for high speed networks particularly ADSL applications that utilize a high voltage differential between two sides of a circuit in normal operation. Digital / solid state modules are superior to gas in speed of response due to repeated tripping within rated limits. An internal fail-safe mechanism permanently grounds the module under sustained high current conditions to protect personnel and equipment. What is PTC (Positive Temperature Coefficient)? PTC refers to materials that have an increase in electrical resistance as their temperature rises. As their temperature rises in a �surge�, the resistance increases and allows less current to flow thereby protecting equipment. When the surge passes the temperature falls and the PTC �fuse� automatically resets allowing normal operation.