Gas Discharge Tube (GDT) Products
AC and CG3 Series
AC and CG3 Series
Description
Littelfuse AC series two-electrode line protectors
provide a high degree of surge protection in AC line
applications. The two models, AC120 and AC240
are designed for use with 120VAC and 240VAC lines
respectively. They are able to extinguish AC follow-on
currents of at least 200A.
Littelfuse CG3 two electrode high voltage (1.0 - 7.5
KV) devices are designed for surge protection and
high isolation applications, and for applications
for which bias voltages or signal levels of several
hundred volts are normally present.
Agency Approvals
Features
AGENCY AGENCY FILE NUMBER
Rugged ceramic-metal Available in tape-and-
*
E320116
construction reel packaging
Low capacitance (<1.5 Available with or
*NOTE: CG3 7.5 product UL approval is currently pending
pF) without leads
2 Electrode GDT Graphical Symbol
Applications
AC Series:
Long branch circuits Power supplies
(AC wall outlet)
Test equipment
Short branch circuits
Submersible pumps
(at breaker box,
Medical electronics
computer, etc)
CG3 Series:
CRT terminals Power supplies
CATV equipment Medical electronics
Antennas
2009 Littelfuse, Inc.
9 AC and CG3 Series
Specications are subject to change without notice.
Revised: February 10, 2010
Please refer to www.littelfuse.com for current information.
Customer should verify actual device performance in their specic applications.Gas Discharge Tube (GDT) Products
AC and CG3 Series
Electrical Characteristics
Device Specications (at 25C) Life Ratings
DC Breakdown Impulse Impulse Insulation Capaci- Arc Max Nominal AC Nominal Max
in Volts Break- Break- Resistance tance Voltage Follow AC Discharge Impulse Surge
5
(on state
down down In On Discharge Current Discharge Current
(@100V/s) (@1MHz)
Voltage) 3 4
(1 x 50Hz
in Volts Volts Current Current Current
(@8/20s)
@1Amp Min
(10x1sec 9 cycles)
(@100V/s) (@1 Kv/sec) (@8/20s)
@50-60Hz)
Part
Number
MIN TYP MAX MAX MIN MAX TYP
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NOTES:
1. Refer to Production Dimensions section, outline A devices
Product Characteristics
2. Refer to Production Dimensions section, outline B devices
3. Tested to UL1449 Third Edition -- 120V r.ms. for AC120, 230V r.m.s. all others.
Conducted with suitable MOV connected in series.
Core Outline A & B items:
4. 10 x [5(+) and 5(-)] applications 5kA @ 8/20s
Device: Tin Plated 17.512.5 Microns
5. 1 x [1(+) and 1(-)] application 10kA @ 8/20s
6. CG3 7.5 product UL approval is currently pending
Axial Outline A items:
7. When ordering this item, use suffix code D004 when entering the part number.
Materials Device: Nickel Plated 25 Microns
The older product version without D004 suffix code has been discontinued.
Wire: Tin Plated 17.512.5 Microns
Refer to Part Numbering System section for additional information.
Axial Outline B items:
Device & Wire: Tin Plated 17.512.5 Microns
LF Logo, Voltage and date code;
Product Marking
Black ink positive print
Glow to arc
< 0.5Amps
transition current
Glow Voltage ~ 140 Volts
Storage and
Operational -40 to +90
Temperature
2009 Littelfuse, Inc.
AC and CG3 Series 10
Specications are subject to change without notice.
Revised: February 10, 2010
Please refer to www.littelfuse.com for current information.
Customer should verify actual device performance in their specic applications.
Device Dimension Type