The STC-642 series of surge suppressors are dual pair (four wire) modules using 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 resetable 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 STC-642 card edge module is gold-plated, double sided and
is designed to mate with the STC-642 gold-plated female terminal connector (sold separately). 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. Terminals 1
or 10 of the STC-PCB1B must be attached to building approved ground.
APPLICATIONS
• Intended for indoor use on communication loop circuits which have been isolated from the Public Switch Telephone Network.
• RS232 applications used with STC642-020 and STC-PCB1B
• 4-20 ma signal applications used with STC642-036 and
STC-PCB1B
• For use in service capable of supplying less than 150 milliamperes continuously.
FEATURES
• Lightning protection for low voltage data
• Signal lines
• Three-stage protection
• Sneak/fault current protection
• Resetable solid-state fuses - PTCs
• Low capacitance option for high speed data
• Plug-in module / Requires PCB1B base
• Hybrid design of includes series resistance
• Fast response time
• Five year limited warranty