©2010 Littelfuse, Inc.
Gas Discharge Tube (GDT) Products
13
Revised: January 21, 2011
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Customer should verify actual device performance in their specific applications.
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.
Features
•Ruggedceramic-metal
construction
•Lowcapacitance(<1.5
pF)
•Availableintape-and-
reel packaging
•Availablewithor
without leads
AGENCY AGENCY FILE NUMBER
®E320116*
Agency Approvals
®
AC and CG3 Series
Applications
•CRTterminals
•CATVequipment
•Antennas
•Powersupplies
•Medicalelectronics
CG3 Series:
•Longbranchcircuits
(AC wall outlet)
•Shortbranchcircuits
(at breaker box,
computer, etc)
•Powersupplies
•Testequipment
•Submersiblepumps
•Medicalelectronics
AC Series:
*NOTE: CG3 7.5 product UL approval is currently pending
2 Electrode GDT Graphical Symbol
©2010 Littelfuse, Inc.
Gas Discharge Tube (GDT) Products
14
Revised: January 21, 2011 Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Customer should verify actual device performance in their specific applications.
AC and CG3 Series
AC and CG3 Series
Electrical Characteristics
Part
Number
Device Dimension Type
Device Specifications (at 25°C) LifeRatings
DC Breakdown
in Volts
(@100V/s)
Impulse
Break-
down
in Volts
(@100V/µs)
Impulse
Break-
down In
Volts
(@1 Kv/µsec)
Insulation
Resistance
Capaci-
tance
(@1MHz)
Arc
Voltage
(on state
Voltage)
@1AmpMin
Max
Follow
On
Current3
Nominal
AC
Discharge
Current
(10x1sec
@50-60Hz)
AC
Discharge
Current
(1x50Hz
9 cycles)
Nominal
Impulse
Discharge
Current4
(@8/20µs)
Max
Surge
Current5
(@8/20µs)
MIN TYP MAX MAX MIN MAX TYP
AC1201A 230 285 340 500 550 10 GΩ
(at 100V) <1.5 pf ~ 25 V 200
Amps 5 A 65 A 10 shots
5kA
1 shot
10kA
AC2401A 480 600 720 1100 1200
CG3 1.01A 800 1000 1200 1400 1500
10 GΩ
(at 100V) <1.5 pf ~ 25 V 200
Amps N/A N/A 10 shots
5kA
1 shot
10kA
CG3 1.11A 880 1100 1320 1600 1700
CG3 1.21A 960 1200 1440 1700 1800
CG3 1.31A 1040 1300 1560 1800 1900
CG3 1.51A 1200 1500 1800 1800 2000
CG3 2.01A 1600 2000 2400 2500 2750
CG3 2.51A 2000 2500 3000 3200 3500
CG3 2.71A 2160 2700 3240 3600 4000
CG3 3.01A 2400 3000 3600 4000 4200
CG3 3.31A 2640 3300 3960 4600 4700
CG3 4.02B 3200 4000 4800 5800 6000
CG3 4.52B 3600 4500 5400 6150 6500
CG3 5.02B 4000 5000 6000 7500 8000
CG3 6.22,7 B 4960 6200 7440 8100 9500
CG3 6.52,7 B 5200 6500 7800 9500 10000
CG3 7.52,6,7 B 6000 7500 9000 10000 10600
NOTES:
1.RefertoProductionDimensionssection,outlineAdevices
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.
4. 10 x [5(+) and 5(-)] applications 5kA @ 8/20µs
5. 1 x [1(+) and 1(-)] application 10kA @ 8/20µs
6. CG3 7.5 product UL approval is currently pending
7.Whenorderingthisitem,usesuffixcodeD004whenenteringthepartnumber.
TheolderproductversionwithoutD004suffixcodehasbeendiscontinued.
RefertoPartNumberingSystemsectionforadditionalinformation.
Product Characteristics
Materials
Core Outline A & B items:
Device:TinPlated17.5±12.5Microns
Axial Outline A items:
Device:NickelPlated2–5Microns
Wire:TinPlated17.5±12.5Microns
Axial Outline B items:
Device&Wire:TinPlated17.5±12.5Microns
Product Marking LF Logo, Voltage and date code;
Blackinkpositiveprint
Glow to arc
transition current <0.5Amps
Glow Voltage
~ 140 Volts
Storage and
Operational
Temperature
-40 to +90
©2010 Littelfuse, Inc.
Gas Discharge Tube (GDT) Products
15
Revised: January 21, 2011
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Customer should verify actual device performance in their specific applications.
AC and CG3 Series
AC and CG3 Series
Reflow Condition Pb–Freeassembly
Pre Heat
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (Min to Max) (ts)60–180secs
Average ramp up rate (Liquidus Temp
(TL) to peak 3°C/second max
TS(max) to TL - Ramp-up Rate 5°C/second max
Reflow - Temperature (TL) (Liquidus) 217°C
- Temperature (tL)60–150seconds
Peak Temperature (TP)260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)10–30seconds
Ramp-down Rate 6°C/second max
Time 25°C to peak Temperature (TP)8minutesMax.
Do not exceed 260°C
Soldering Parameters - Reflow Soldering (Surface Mount Devices)
Time
Temperature
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
(t 25ºC to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
TL to TP
Soldering Parameters - Wave Soldering (Thru-Hole Devices)
Soldering Parameters - Hand Soldering
Dwell Time
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
Time (Seconds)
Temperature (°C) - Measured on bottom side of board
Cooling Time
Preheat Time
Wave Parameter Lead-Free Recommendation
Preheat:
(DependsonFluxActivationTemperature) (TypicalIndustryRecommendation)
TemperatureMinimum: 100° C
TemperatureMaximum: 150° C
PreheatTime: 60-180 seconds
Solder Pot Temperature: 280° CMaximum
Solder Dwell Time: 2-5 seconds
Recommended Process Parameters:
SolderIronTemperature:350°C+/-5°C
HeatingTime:5secondsmax.
©2010 Littelfuse, Inc.
Gas Discharge Tube (GDT) Products
16
Revised: January 21, 2011 Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Customer should verify actual device performance in their specific applications.
AC and CG3 Series
AC and CG3 Series
Packaging Dimensions
Direction of Feed
254.0 - 356.0
[10.0 - 14.0]
80.0
[3.15]
22.8
[0.898]
52.4
[2.063]
6.4
[0.252]
<0.8 Max
<1.2 Max. Lead Bend
5.0 Pitch
[0.197]
For 'LTR' Option Code Axial Lead Items
Direction of Feed
254.0 - 356.0
[10.0 - 14.0]
80.0
[3.15]
22.8
[0.898]
52.4
[2.063]
6.4
[0.252]
<0.8 Max
<1.2 Max. Lead Bend
5.0 Pitch
[0.197]
8.0 ± 0.2
[0.314 ± 0.008]
8.0 ± 0.2
[0.314 ± 0.008]
6.0 ± 0.2
0.80 DIA. TYP.
[0.031]
62 ± 2
[0.236 ± 0.008]
[2.441 ± 0.079]
PROFILE VIEW TOP VIEW
7.9 ± 0.3
0.80 DIA. TYP.
[0.031]
[0.311 ± 0.012]
A
B
Device Dimensions
Axial
6.0 ± 0.2
[0.236 ± 0.008]
PROFILE VIEW TOP VIEW
7.9 ± 0.3
[0.311 ± 0.012]
A
B
SEMI–PROFILE VIEW
8.0 ± 0.2
[0.314 ± 0.008]
8.0 ± 0.2
[0.314 ± 0.008]
Core
Part Numbering System and Ordering Information
CG3 X.X XXX D004
Breakdown Voltage
1.0 = 1000V
1.1 = 1100V
1.2 = 1200V
1.3 = 1300V
1.5 = 1500V
2.0 = 2000V
2.5 = 2500V
2.7 = 2700V
3.0 = 3000V
3.3 = 3300V
4.0 = 4000V
4.5 = 4500V
5.0 = 5000V
6.2 = 6200V
6.5 = 6500V
7.5 = 7500V
Series
CG3
Lead / Packaging Option
= Core (no leads) / Bulk pack, 400 pcs per bag
L = Leaded / Bulk pack, 50 pcs per tray
LTR = Leaded / Tape & Reel, 500 pcs per reel
Special Suffix Code
Enter this D004 special suffix code when placing orders
for CG36.2, CG36.5 and CG37.5 only
AC XXX XXX
AC Line Voltage
120 = 120V
240 = 240V
Series
Lead / Packaging Option
= Core (no leads) / Bulk pack, 400 pcs per bag
L = Leaded / Bulk pack, 50 pcs per tray
LTR = Leaded / Tape & Reel, 500 pcs per reel