Edco PC642C-008LC-APD 8V Surge Protector.
PC642C-008LC-APD 8V Low Capacitance 5-Wire, 2-Pair Data/Signal, and Common Line Protection.
The Emerson Edco PC642 Series surge suppressor Protects 5 Wire applications where dual-pair Signaling and a common wire are being utilized. Three Stage Hybrid protection of Signaling Pairs address over voltage transients with gas tubes and silicon avalanche components while sneak and fault currents are mitigated with resettable fuses (PTCs). The PTCs increase resistance 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 PC642 card edge module is gold-plated, double-sided and is designed to mate with the PCB1B gold-plated female terminal connector. When snapped together, the data circuits "pass thru" the protector in a serial fashion from the four "Field Side" terminals to the four "Electronics Side" terminals.
The PC642C-008LC-APD Version also adds common wire protection