Gas Discharge Tubes
CG6 Series
CG6 Series
Description
RoHS
Agency Approvals
AGENCY
AGENCY FILE NUMBER
The Littelfuse CG6 series GDT is a miniature surface-
mount device with a 3kA 8/20 surge rating. This
ITU-T K.12 Class 1, Type 1 GDT provides protection
against fast rising transients typically caused by
nearby lightning events. Its low insertion loss and
thus low off-state capacitance makes it compatible
with high bandwidth applications up to the GHz
RF range. This GDT’s crowbarring characteristic
protects sensitive ICs from surges as defined in ITU
K.20/21/45 Basic and Enhanced Recommendations,
GR-1089-CORE first level lightning Port Type 1,3, and
5, and IEC 61000-4-5, 2
nd
edition Level 5 and below. It
is hermetically sealed using non-radioactive materials
and is thus environmentally safe.
Features
E128662
E320116
Two Electrode GDT Graphical Symbol
Additional Information
• RoHS compliant and
Lead-free
• Excellent Surge
Withstanding Capability
• Excellent response to
fast rising transients.
• Ultra Low Insertion
Loss and low off-state
capacitance for GHz
bandwidth compatibility
• 3kA 8/20µs surge
capability
Applications
• Compact SMD package
offered in two squared
terminals
• Non-Radioactive
• Ultra Low capacitance
(<0.3pF)
• Voltage Range 75V to
600V
• UL recognized
• Characterized according
to ITU-T K.12 as a Class
X, Type 1 GDT
Datasheet
Resources
Samples
CG5 Series
• Broadband equipment
• CATV/Broadband
equipment
• Data lines and Ethernet
(up to 10GbE)
• xDSL equipment,
including ADSL2, ADSL,
VDSL, VDSL2 30a
bandplan compatible
• IAD (Integrated Access
Device)
• Set Top Box (STB)
• General telecom
equipment
• Embedded Multimedia
Terminal Adapter
(EMTA)
• RF Connector
• Multimedia over Coax
Alliance (MoCA)
• Base Station RF
antenna transmitter
• G.Fast 106MHz and
212 MHz bandplans
compatible
• Aerospace and
Automotive
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/12/17
Gas Discharge Tubes
CG6 Series
Electrical Characteristics
Device Specifications
(at 25°C)
DC Breakdown
in Volts
(@100V/s)
Life Ratings
Max
Impulse
Discharge
Current
(8/20µs)
Part
Number
CG675
CG690
CG6145
CG6230
CG6250
CG6300
CG6350
CG6400
CG6470
CG6600
Impulse
Break-
down
in Volts
(@100V/µs)
Impulse Insulation
Break- Resistance
down In
Volts
(@1 kV/µs)
Capaci-
tance
(@1MHz)
Max
Impulse
Discharge
Current
(10/700µs)
AC
Dischage
Current
(50Hz, 1sec)
AC
Dischage
Current
(Single, 9
Cycles)
DC
Holdover
Voltage
(<150ms)
Impulse
Life
(10/1000µs)
(50A)
MIN
TYP MAX
MAX
MIN
MAX
MIN
MIN
MIN
60
72
116
186
200
240
280
360
376
480
75
90
145
230
250
300
350
400
470
600
90
108
174
276
300
360
420
480
564
720
600
600
600
600
600
650
750
850
900
1000
700
700
700
700
700
800
900
1000
1100
1200
1GΩ
@50V
10 Shots
@
(3kA)
1
1 Shot at
5kA
1GΩ
@100V
0.3pf
10 Shots
@
(150A/6kV)
2
3A
6A
1GΩ@250V
52V
52V
52V
80V
80V
135V
135V
135V
135V
135V
300
Shots
Note:
1. 5 x (+) and 5 x (-) applications of 3kA 8/20μs sec.
2. 5 x (+) and 5 x (-) applications of 150A 10/700μs sec.
Typical Insertion Loss
@1.0GHz = 0.03dB
@1.4GHz = 0.06dB
Product Characteristics
Device Tin Plated 17 ± 12.5
.5
Microns
Construction: Ceramic Insulator
-40 to +90°C
@1.8GHz = 0.09dB
@2.0GHz = 0.11dB
@2.4GHz = 0.13dB
@2.8GHz = 0.15dB
@3.1GHz = 0.17dB
Materials
Storage and Operational
Temperature
Voltage Vs. Time Characteristic
@3.5GHz = 0.19dB
@4.0GHz = 0.22dB
800
Max dynamic
breakover voltage
Note: Insertion data for customer reference only, application testing needed for verification.
V-I Characteristic Curve
600
Characteristics of Gas Plasma -response to transient condition
Arc Voltage
Point at which gas tube is at
lowest impedance and
fully conductive.
Typical arc voltage at about
10 to 12 Volts
Voltage (V)
400
Hold over voltage
200
On-state voltage
0
I Axis
V Axis
Max Dynamic Breakover Voltage
(Impulse Breakdown)
Point at which gas tube is at
lowest impedance and
fully conductive
0
200
400
600
800
1000
1200
Time (ns)
Note: Tested per 1kV/µs waveform
Holdover Voltage
Device resets to a high
impedance state once the
voltage across the device
falls below this level.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/12/17
Gas Discharge Tubes
CG6 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
Device Dimensions
Dimensions in millimeters
TOP VIEW
PROFILE VIEW
Product Marking
A 6A
3.5 ± 0.2
0.5 ± 0.2
3.5 ± 0.2
Type Code
Production Year
Code (Lasr Digit)
Production Month
Code
4.0 ± 0.2
TOP VIEW
1.3
5.0
3.5
Recommended Soldering Pad Layout
A
B
S
D
R
E
G
I
P
V
Type Code
CG675
CG690
CG6145
CG6230
CG6250
CG6300
CG6350
CG6400
CG6470
CG6600
A
B
C
D
E
F
G
H
I
J
K
L
Month Code
January
February
March
April
May
June
July
August
September
October
November
December
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/12/17
Gas Discharge Tubes
CG6 Series
Taping and Reel Specifications
Unit = mm
Item
P
P0
P2
W
F
A0
Spec
8.0 ± 0.1
4.0 ± 0.1
2.0 ± 0.1
12.0 ± 0.3
5.5 ± 0.1
3.9 ± 0.1
Item
E
D
B0
K0
T
10P0
Spec
1.75 ± 0.1
1.50 + 0.1/-0.0
4.5 ± 0.1
3.9 ± 0.1
0.4 ± 0.1
4.0 ± 0.2
330±4.0
>1.5
E
P2
P0
P
D
F
W
B0
A0
K0
T
Packaging Quantity:
2000 pcs per reel (13”)
1 reels per inner box
10 inners box per carton
20,000 pcs per full carton
100 Typ.
15 Typ.
Part Numbering System and Ordering Information
CG6 XXX SM
Series
CG6
Breakdown Voltage
75 = 75V
90 = 90V
145 = 145V
230 = 230V
250 = 250V
300 = 300V
350 = 350V
400 = 400V
470 = 470V
600 = 600V
Lead Option Code
SM (Surface Mount,
Two Square Terminals)
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.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/12/17
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