Brochure

25
Data/signal line surge protection
STC-642 SERIES
e STC-642 series of surge suppressors are dual
pair (four wire) modules using three-stage hybrid
technology. is module addresses over voltage
transients with gas tubes and silicon avalanche
components. In addition, sneak and fault currents
are mitigated with resetable fuses (PTCs). e PTCs
increase resistance several orders of magnitude when
over currents exceed safe levels. A normal state resumes
when over currents are removed. e ability to self
restore in this manner signicantly increases suppressor
performance and survivability.
e 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
• ree-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
Specications
DESCRIPTION STC642-020* STC642-036*
Peak Surge Current
(10 times)
8x20 s .. 10kA
10x700 s 500A per line
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) 1500pf
Operating Temperature -40
o
C to +85
o
C
Weight - oz 2
Dimensions H x W x L -
in (mm)
(STC-642 & PCB1B)
2.05 x 1.00 x 2.40 (52.1 x 25.4 x 61.0)
Warranty 5 year limited warranty
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 oers 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
*Part number STC-PCBIB sold separately
Selection Table