Cut Sheet

SURGE PROTECTION MODULES
5 PIN - SOLID STATE MODULE SERIES
6293 W. Linebaugh Ave - Tampa, Fl 33625
Phone [phone] - Fax [phone] - Email [e-mail] - www.circatelecom.com
Circa Telecom, Inc ® 2011 - Version 1.02
Model Number Stock Code Application Color
Clamping
Voltage
3BIS-300 770131 Low Impedance for Long Cable Runs Black 300V
4B1S-300 770135 Low Impedance for Long Cable Runs (4 Series has PTC) Black 300V
3B3S-300 770133 Low Impedance for Long Cable Runs Red 300V
RUS Approved Material - 2011 Edition RUS Publication 344-2 - Section 4.1.3 and 4.2.1
3BIS-300 & 4B1S-300
5 PIN - Solid State - Surge Protection Module
UL 497 Primary Protector for Communication Circuits
Product Specifications
Ordering Information
Nanosecond Response Time
Internal Failsafe Mechanism that Permanently
Grounds the Module Under Sustained High Current
Conditions
Balanced Operation
UL Listed and RUS Approved
Design to Exceed Telcordia Standards
Integrated Test Points
ISO 9001 Certified Manufacturer
The 3B1S-300 is a premium series 5 PIN solid state protector module that is designed to provide superior transient
and power fault protection for most standard telephone line applications.
These solid state modules are suited to applications that require the protection of sensitive telephone equipment
due to their nanosecond reaction time.
The characteristics of the solid state protector are far superior to gas tube technology in speed and are virtually
immune to overshoot, aging and failure due to repeated tripping.
The 4 - Series features PTC (positive temperature coefficient) technology. These optional self-resetting current
limiters provide effective protection from 'sneak current' faults. The PTC is vastly superior to the heat coil solution,
which requires that the module be replaced after each 'sneak current' event.