Gas Discharge Tubes
AC and CG3 Series
AC and CG3 Series
Description
RoHS
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
E320116
*NOTE: CG3 7 product UL approval is currently pending
.5
*
• Rugged ceramic-metal
construction
• Low capacitance (<1.5
pF)
Applications
AC Series:
• Available in tape-and-
reel packaging
• Available with or
without leads
2 Electrode GDT Graphical Symbol
Additional Information
• Long branch circuits
(AC wall outlet)
• Short branch circuits
(at breaker box,
computer, etc)
CG3 Series:
•
•
•
•
Power supplies
Test equipment
Submersible pumps
Medical electronics
Datasheet
AC Series
Resources
AC Series
Samples
AC Series
• CRT terminals
• CATV equipment
• Antennas
• Power supplies
• Medical electronics
Datasheet
CG3 Series
Resources
CG3 Series
Samples
CG3 Series
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/12/17
Gas Discharge Tubes
AC and CG3 Series
Electrical Characteristics
Device Dimension Type
Device Specifications
(at 25°C)
DC Breakdown
in Volts
(@100V/s)
Life Ratings
Impulse Impulse Insulation Capaci-
Arc
Max
Nominal
AC
Nominal
Max
Break-
Break- Resistance tance Voltage Follow
AC
Discharge Impulse
Surge
(on state
down down In
On
Discharge Current Discharge Current
5
(@1MHz)
3
Voltage)
(1 x 50Hz
in Volts
Volts
Current
Current
Current
4
(@8/20µs)
(@100V/µs)
(@1 Kv/µsec)
@1Amp Min
(10x1sec
@50-60Hz)
9 cycles)
(@8/20µs)
Part
Number
AC120
1
MIN
TYP
MAX
MAX
MIN
MAX
TYP
A
A
A
A
A
A
A
A
A
A
A
A
B
B
B
B
B
B
1
230
480
880
285
600
340
720
500
1100
1400
1600
1700
1800
1800
2500
3200
3600
4000
4600
5800
6150
7500
8100
9500
10000
550
1200
1500
1700
1800
1900
2000
2750
3500
4000
4200
4700
6000
6500
8000
9500
10000
10600
AC240
1
CG3 1.0
1
CG3 1.1
CG3 1.3
CG3 1.2
1
1
10 GΩ
(at 100V)
<1.5 pf
~ 25 V
200
Amps
5A
65 A
10 shots
5kA
1 shot
10kA
800 1000 1200
1100 1320
960 1200 1440
1040 1300 1560
1200 1500 1800
1600 2000 2400
2000 2500 3000
2160 2700 3240
2400 3000 3600
2640 3300 3960
3200 4000 4800
3600 4500 5400
4000 5000 6000
4960 6200 7440
5200 6500 7800
6000 7500 9000
CG3 1.5
1
CG3 2.0
1
CG3 2.5
1
CG3 2.7
1
CG3 3.0
CG3 4.0
CG3 5.0
1
10 GΩ
(at 100V)
<1.5 pf
~ 25 V
200
Amps
N/A
N/A
10 shots
5kA
1 shot
10kA
CG3 3.3
1
2
CG3 4.5
2
2
CG3 6.2
2,7
CG3 6.5
2,7
CG3 7
.5
2,6,7
NOTES:
1. Refer to Production Dimensions section, outline A devices
2. Refer to Production Dimensions section, outline B devices
3. Tested to UL1449 -- 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 product UL approval is currently pending
.5
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
Core Outline A & B items:
Device: Tin Plated 17
.5±12.5 Microns
Axial Outline A & B items:
Device & Wire: Tin Plated 17
.5±12.5 Microns
LF Logo, Voltage and date code;
Black ink positive print
< 0.5Amps
~ 140 Volts
-40 to +90
Materials
Product Marking
Glow to arc
transition current
Glow Voltage
Storage and
Operational
Temperature
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/12/17
Gas Discharge Tubes
AC and CG3 Series
Soldering Parameters - Reflow Soldering (Surface Mount Devices)
Reflow Condition
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (Min to Max) (t
s
)
Average ramp up rate (Liquidus Temp
(T
L
) to peak
T
S(max)
to T
L
- Ramp-up Rate
Reflow
- Temperature (T
L
) (Liquidus)
- Temperature (t
L
)
Pb – Free assembly
150°C
60 – 180 secs
3°C/second max
5°C/second max
217°C
60 – 150 seconds
260
+0/-5
T
P
T
L
Temperature
t
P
Ramp-up
Critical Zone
T
L
to T
P
200°C
T
S(max)
T
S(min)
Preheat
t
L
Ramp-down
t
S
time to peak temperature
(t 25ºC to peak)
25
Time
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
°C
10 – 30 seconds
6°C/second max
8 minutes Max.
260°C
Soldering Parameters - Wave Soldering (Thru-Hole Devices)
300
Recommended Process Parameters:
Wave Parameter
Preheat:
(Depends on Flux Activation Temperature)
(Typical Industry Recommendation)
Temperature (°C) - Measured on bottom side of board
280
260
240
220
200
180
160
140
120
100
80
60
40
20
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
10
20
30
40
50
60
70
80
90
0
0
Lead-Free Recommendation
Temperature Minimum:
Temperature Maximum:
Preheat Time:
Solder Pot Temperature:
Solder Dwell Time:
100
°
C
150
°
C
60-180 seconds
280
°
C Maximum
2-5 seconds
Time (Seconds)
Preheat Time
Dwell Time
Cooling Time
Soldering Parameters - Hand Soldering
Solder Iron Temperature: 350° C +/- 5°C
Heating Time: 5 seconds max.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/12/17
Gas Discharge Tubes
AC and CG3 Series
Device Dimensions
Axial
PROFILE VIEW
TOP VIEW
Part Numbering System and Ordering Information
AC XXX
XXX
Series
0.80
DIA. TYP.
[0.031]
CG3 X.X
XXX D004
Series
CG3
AC Line Voltage
8.0 ± 0.2
[0.314
± 0.008
]
A
[0.236 ± 0.008]
[2.441 ± 0.079]
120 = 120V
240 = 240V
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
Lead / Packaging Option
6.0 ± 0.2
62 ± 2
= 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
[0.311 ± 0.012]
7.9 ± 0.3
B
0.80
DIA. TYP.
[0.031]
8.0 ± 0.2
[0.314
± 0.008
]
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
<1.2 Max. Lead Bend
SEMI–PROFILE VIEW
Special Suffix Code
Enter this D004 special suffix code when placing orders
for CG36.2, CG36.5 and CG37.5 only
Core
PROFILE VIEW
TOP VIEW
A
[0.236 ± 0.008]
8.0 ± 0.2
[0.314
± 0.008
]
<0.8 Max
6.0 ± 0.2
52.4
[2.063]
22.8
[0.898]
B
[0.311 ± 0.012]
8.0 ± 0.2
[0.314
± 0.008
]
6.4
[0.252]
7.9 ± 0.3
5.0 Pitch
[0.197]
Packaging Dimensions
For 'LTR' Option Code Axial Lead Items
<1.2 Max. Lead Bend
254.0 - 356.0
[10.0
- 14.0]
<0.8 Max
52.4
[2.063]
22.8
[0.898]
80.0
[3.15]
Direction of Feed
6.4
[0.252]
5.0 Pitch
[0.197]
254.0 - 356.0
[10.0
- 14.0]
Disclaimer Notice -
Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete
Disclaimer Notice at:
www.littelfuse.com/disclaimer-electronics.
80.0
[3.15]
Direction of Feed
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/12/17
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