Home > Products > Surge Supression > STC-642 Data/Signal Series
S2K Line Interactive
S3K Mini-Tower
S3K2U Rack/Tower
S4K Industrial, 700 VA - 10 KVA Units
S5K Modular
MultiLink Software
General Purpose Distribution
Low Temperature Rise
General Purpose Automation
Hazardous Location
Drive Isolation
Industrial Control
STV 200/400K Surge Protective Devices
STV100K Hardwired Surge Protection
STV25K DIN Rail Mount Surge Protection
STFE Elite DIN Rail Series
STFV Series - Both Active Tracking Filtering
STF Series Series - Active Tracking Filters
STC-PoE: Power-Over-Ethernet
STC-DRS: DIN Rail Mount
STC-642: Two Pair Data/Signal Protection
STC-CCTV: High-Frequency Coaxial Protection
STC-TEL: Telephone Protection
CVS Hardwired Series
MCR Hardwired Series
MCR Portable
SLR Series DIN Rail Mounted Line Reactors
SOLATRON Plus 3PH Power Conditioners
IP67 SCP-X Power Supplies
SCP-X Extreme Environment
SDN-P DIN Rail Series
SDN-C Next Generation (DIN Rail)
DeviceNet Series
SDN Redundant Options
SDP Low Power (DIN Rail)
SCP 30 Watt; Single, Dual, Triple (DIN Rail)
SCL 4-10 Watt CE Linears (DIN Rail)
SCD 30 Watt; Single, Dual (DIN Rail)
SFL 12/24/48 V, 75-600 Watts (DIN Rail)
Silver Line Series Open-frame Linears
Copper Line Series (300-1200 Watt Adjustable)
GL Series OEM Switchers
SHP High Power Modulars
SMP Medium Power Modulars
SVL Series: Essential Power Supplies
Power Supplies
Power Conditioning
Surge Supression
Uninterruptible Power Supplies
Request Quote
NEW: SVL Series

STC-642 Series Data/Signal Line Protection

The STC-642 Series of Surge Protection Devices are dual pair (four wire) modules using three-stage hybrid technology. This module addresses over voltage transients with gas tubes and silcon 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 PCB1B must be attached to building approved ground.


  • 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<1 Nanosecond
  • Fast Response Time
  • UL 497B Listed
  • 5 Year Warranty

PDF Files

STC-642 Series Specifications
STC-642 Series Manual


STC-642 Series Data/Signal Line Protection

Description STC642-020 STC642-036
Peak Surge Current (10 Times) 8x20 s..10kvA
10x70 s 500A per line
Life Expectancy 8x20 s (2000a)..>100 occurances
10x700 s (400A)
Response Time <1ns
Voltage Clamp 20 36
Technology SAD Hybrid
Resistance 5 (typical)
Capacitance Typical
Standard Models 1500pf
Low Capacitance Models 50pf
Operating Temperature -40oC to +85oC
Weight 2 oz.
(STC-642 & PCB1B)
H x W x L
2.05 x 1.0 x 2.4
Certifications UL 497B
Warranty 5 Year



Catalog Number Description
STC-DRS-232 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.
STC-DRS-036 DIN Rail Mounting Clips for STC-PCB1B
STC-FM4-DRC DIN Rail Mounting Clips for PCB1B

Products | Request Quote | Credit Application | Contact Us
Sola/Hevi-Duty Proudly Distributed by Gross Automation | PH: (877) 268-3700