The STC-DRS-036 is a DIN rail mountable single pair surge Suppression Module implementing three-stage hybrid technology. This module addresses over-voltage transients with gas tubes and silicon avalanche components. In addition, sneak currents are mitigated with resettable fuses (PTCs). The PTC increases resistance by several orders of magnitude when over-currents exceed safe levels. A normal state resumes when over-currents are removed. The ability to self-restore in this manner significantly increases suppressor performance and survivability. The STC-DRS series mounts onto a standard 35mm industrial DIN Rail. There are three Field Side and three electronics side screw terminals. One is reserved for a shield. Three electrically tied ground terminals are provided for grounding the unit to building-approved ground. Shield is isolated from ground.