Littelfuse CG7120 The littelfuse cg7 series gdt is a miniature surface mount device with a 1ka 8/20î¼s surge rating Datasheet

Gas Discharge Tubes
CG7 Series
CG7 Series
RoHS
Description
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E128662
Features
E320116
• 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
• Ultra small devices
offered in SMD package
Two Electrode GDT Graphical Symbol
Additional Information
Datasheet
Resources
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/12/17
The Littelfuse CG7 series GDT is a miniature
surface mount device with a 1kA 8/20μS surge
rating. Its low insertion loss and thus low offstate 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 and 3, and IEC 610004-5 2nd edition. It is hermetically sealed using nonradioactive materials Classes 1-3 and some Class 4 &
5 cases and is thus environmentally safe. Its 2.8mm
diameter size makes it the world’s smallest twoelectrode single chamber GDT available.
Samples
CG5 Series
• 1kA 8/20μS surge
capability pulse as
defined by IEC 610004-5 2nd edition
• Ultra Low capacitance
(<0.3pF)
• Voltage Range 75V
to 470V
• UL recognized
Applications
• Set top box
• Cable Modem
• 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
• CATV/Broadband
equipment
• Data lines and Ethernet
(up to 10GbE)
• Telecom line protection
• Broadband equipment
• xDSL equipment,
including ADSL2, ADSL,
VDSL, VDSL2 30a
bandplan compatible
• IAD (Integrated Access
Device)
• Aerospace and
Automotive
Gas Discharge Tubes
CG7 Series
Electrical Characteristics
Device Specifications (at 25°C)
DC Breakdown
in Volts
(@100V/s)
Part
Number
CG775
CG790
CG7120
CG7150
CG7200
CG7230
CG7250
CG7350
CG7400
CG7470
Impulse
Breakdown
in Volts
Impulse
Breakdown In
Volts
(@100V/µs)
(@1kV/µs)
MIN
TYP MAX
MAX
60
72
96
120
160
186
200
280
360
376
75
90
120
150
200
230
250
350
400
470
600
600
600
600
600
600
600
750
850
900
90
108
144
180
240
276
300
420
480
564
Insulation
Resistance
Capacitance
(@1MHz)
Max
Impulse
Discharge
Current
Max Impulse AC Dischage
Current
Discharge
(9 cycle @50Hz)
Current
(10/700µs)
DC
Holdover
Voltage
(<150ms)
Impulse
Life
(8/20µs)
(100A)
(8/20µs)
MIN
700
700
700
700
700
700
700
900
1000
1100
Life Ratings
MAX
MIN
MIN
52V
52V
80V
80V
135V
135V
135V
135V
135V
135V
1GΩ@50V
1GΩ@100V
0.3pf
10 Shots
(@1kA) 1
1 Shot
at 2kA
10 Shots
(@ 100A/4kV) 2
1A
1GΩ@250V
Notes:
UL Pending for CG775 and CG7470.
1. 5 x (+) and 5 x (-) applications of 1kA 8/20μs sec.
2. 5 x (+) and 5 x (-) applications of 100A 10/700μs sec.
300
Shots
Typical Insertion Loss
@1.0GHz = 0.02dB
Product Characteristics
@1.4GHz = 0.03dB
@1.8GHz = 0.05dB
Materials
Device Tin Plated 17.5 ± 12.5
Microns
Construction: Ceramic Insulator
@2.0GHz = 0.06dB
Storage and Operational
Temperature
-40 to +90°C
@2.8GHz = 0.08dB
@2.4GHz = 0.07dB
@3.1GHz = 0.09dB
@3.5GHz = 0.10dB
Voltage Vs. Time Characteristic
@4.0GHz = 0.12dB
Note: Insertion data for customer reference only, application testing needed for verification.
Max dynamic
breakover voltage
800
V-I Characteristic Curve
Voltage (V)
600
Characteristics of Gas Plasma -response to transient condition
I Axis
400
Hold over voltage
200
0
Arc Voltage
Point at which gas tube is at
lowest impedance and
fully conductive.
Typical arc voltage at about
10 to 12 Volts
V Axis
0
200
400
600
800
1000
Max Dynamic Breakover Voltage
(Impulse Breakdown)
Point at which gas tube is at
lowest impedance and
fully conductive
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
CG7 Series
Soldering Parameters - Reflow Soldering (Surface Mount Devices)
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
260
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
Critical Zone
TL to TP
Ramp-up
TL
TS(max)
tL
Ramp-down
Preheat
TS(min)
25
Peak Temperature (TP)
+0/-5
tP
TP
Temperature
Reflow Condition
tS
time to peak temperature
(t 25ºC to peak)
Time
°C
Device Dimensions
Product Marking
Dimensions in millimeters
TOP VIEW
A 7A
PROFILE VIEW
2.8 ± 0.2
0.5
2.8 ± 0.2
Type Code
2.1 ± 0.2
3.5 ± 0.2
TOP VIEW
1.2
4
2.5
Recommended Soldering Pad Layout
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/12/17
A
B
T
C
O
D
R
G
I
P
Production Year
Code (Laser Digit)
Type Code
CG775
CG790
CG7120
CG7150
CG7200
CG7230
CG7250
CG7350
CG7400
CG7470
Production Month
Code
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
Gas Discharge Tubes
CG7 Series
Taping and Reel Specifications
Unit = mm
Item
Spec
Item
Spec
P
8.0 ± 0.1
E
1.75 ± 0.1
P0
4.0 ± 0.1
D
1.50 + 0.1/-0.0
P2
2.0 ± 0.1
B0
3.9 ± 0.1
W
12.0 ± 0.3
K0
3.2 ± 0.1
F
5.5 ± 0.1
T
0.4 ± 0.1
A0
3.2 ± 0.1
10P0
P2
E
P0
P
D
F
W
B0
T
A0
4.0 ± 0.2
K0
330±4.0
>1.5
Packaging Quantity:
2500 pcs per reel (13”)
1 reels per inner box
10 inners box per carton
25,000 pcs per full carton
100 Typ.
15 Typ.
Part Numbering System and Ordering Information
CG7 XXX MS
Series
CG7
Breakdown Voltage
70 = 70V
90 = 90V
120 = 120V
150 = 150V
200 = 200V
230 = 230V
350 = 350V
400 = 400V
470 = 470V
Surface Mount
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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