1 Power Protection and Conditioning STC-642 Series, Data/Signal Line Protection 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. Application * 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 Certifications and Compliances * Listed - UL 497B * RoHS Compliant 38 Selection Table Catalog Number Description STC642-020 20 Volt Clamp STC642-036 36 Volt Clamp STC-PCB1B Base for all STC-642 models. Designed to accommodate up to 10 AWG wire. It offers Flat/ Phillips screws and can be mounted using 2 #6 size screws. Must be ordered separately. STC-FM4-DRC Optional DIN Rail Mounting Clip for STC-PCB1B Specifications Description STC642-020 * STC642-036 * 8x20 s .. 10kA 10x700 s 500A per line Peak Surge Current (10 times) Life Expectancy 8x20 s (2000A) .. >100 occurrences 10x700 s (400A) Response Time <1ns Voltage Clamp 20 36 Technology SAD Hybrid Resistance 5 (typical) Capacitance (typical) Operating Temperature Weight Dimensions H x W x L - in (mm) STC-642 & PCB1B Warranty * Part number STC-PCBIB sold separately Contact Technical Services at (800) 377-4384 with any questions. Visit our website at www.solahd.com. 1500pf -40 C to +85oC o 2 oz. 2.05 x 1.00 x 2.40 (52.1 x 25.4 x 61.0) 5 year limited warranty 1 Power Protection and Conditioning STC-642 Series, Data/Signal Line Protection Wiring Diagram (PIN Assignments) 2.16 (55.0) 2.41 (61.2) Ground Terminal 1 or 10 (internally tied together) to building approved ground. The STC-PCB1B accommodates 24 to 10 AWG wire. 0.12 (3.0) 0.49 (12.4) 2.40 (61.0) Top View 0.80 (20.3) Side View Contact Technical Services at (800) 377-4384 with any questions. Visit our website at www.solahd.com. 39