3R-8-SSS SERIES
Gas Discharge Tube (GDT) Data Sheet
Features
■
Provide ultra-fast response to surge voltage from slow-rising
surge of 100V/s to rapid-rising surge of 1KV/μs
■
Stable breakdown voltage
■
High insulation resistance
■
Low capacitance (≤2pF)
■
High holdover voltage
■
Large absorbing transient current capability
■
Micro-Gap Design
■
Size: 8.0mm*10.0mm
■
Storage and operating temperature: -40℃ ~ +85℃
■
Meets MSL level 1, per J-STD-020
■
Safety certification: E244458
Applications
■
Repeaters, Modems
■
Telephone Interface, Line cards
■
Data communication equipment
■
Line test equipment
Part Number Code
3
R
M
8
SSS
Electrical
Characteristics
M:10KA
P: 20KA
DC
Spark-over
Voltage
Lead Type
M: SMD
SSS：Internal
Control Code
Electrode Numbers
3R: 3 Electrodes
Dimensions
8: 8.0mm×10.0mm
Revision: GDT-3R-8-SSS SERIES-001(A2)
2/5
http://brightking.pulseelectronics.com
3R-8-SSS SERIES
Dimensions
10.0
T
5
Symbol
D
Dimension (mm)
Spec.
8.0
7.9
10.0
0.5
1.5
Tolerance
+0.2, -0.8
±0.2
±0.5
±0.1
±0.2
D
8
D1
T
3
1.5
B1
B
D1
Recommended Pad Size
B
B1
Electrical Characteristics
DC
Spark-over
Voltage
Part
Number
Type
①
100V/s
(V)
3RM075M-8
3RM090M-8
3RM150M-8
3RM200M-8
3RM230M-8
3RM350M-8
3RM400M-8
3RM470M-8
3RM600M-8
3RM800M-8
3RP075M-8
3RP090M-8
3RP150M-8
3RP200M-8
3RP230M-8
3RP350M-8
3RP400M-8
3RP470M-8
3RP600M-8
3RP800M-8
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
75±20%
90±20%
150±20%
200±20%
230±20%
350±20%
400±20%
470±20%
600±20%
800±20%
75±20%
90±20%
150±20%
200±20%
230±20%
350±20%
400±20%
470±20%
600±20%
800±20%
Maximum
Impulse
Spark-over
Voltage
1000V/μs
(V)
700
700
700
700
800
900
1000
1100
1300
1600
700
700
700
700
800
900
1000
1100
1300
1600
Nominal
Impulse
Discharge
Current
8/20μs
10times
(KA)
10
10
10
10
10
10
10
10
10
10
20
20
20
20
20
20
20
20
20
20
Alternating
Discharge
Current
Impulse
Life
10/1000μs
100A
(times)
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
Minimum
Insulation
Resistance
Test
Voltage
DC(V)
25
50
100
100
100
100
100
250
250
250
25
50
100
100
100
100
100
250
250
250
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Maximum
Capacitance
Device
Marking
Code
50Hz,1sec
(A)
10
10
10
10
10
10
10
10
10
10
20
20
20
20
20
20
20
20
20
20
1MHz
(GΩ)
(pF)
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Notes：① Specific code by request.
Revision: GDT-3R-8-SSS SERIES-001(A2)
3/5
http://brightking.pulseelectronics.com
3R-8-SSS SERIES
Electrical Ratings
Items
DC Spark-over
Voltage
Maximum Impulse
Spark-over Voltage
Test Condition/Description
The voltage is measured with voltage ramp dv/dt=100V/s. Test is between
each side electrode and center electrode.
The maximum impulse spark-over voltage is measured with voltage ramp
dv/dt=1000V/μs. Test is between each side electrode and center electrode.
Maximum surge current that can be applied through center electrode with
8/20μs waveform, for 10 times with 3min interval time, which will be equally
divided between each side electrode to center electrode.
Crest value
100
90
Requirement
Impulse
Discharge Current
Current (%)
To meet
50
20µs
10
0
8µs
Time
Impulse Width
the specified
value
Alternating
Discharge Current
Insulation
Resistance
Rated RMS value of AC current at 50Hz, 1 sec. for 10 times with interval
time 3 min. Test is between each side electrode and center electrode.
The resistance of gas tube shall be measured between each side
electrodes and center electrode.
The capacitance of gas tube shall be measured between each side
electrodes and center electrode.
Test frequency: 1MHz
Capacitance
Recommended Soldering Conditions
Reflow Soldering
T
P
Ramp-up
T
L
T
S max
Temperature
t
P
Critical Zone
T
L
to T
P
t
L
T
S min
t
S
Preheat
Ramp-down
25
t 25℃ to Peak
Time
Revision: GDT-3R-8-SSS SERIES-001(A2)
4/5
http://brightking.pulseelectronics.com
3R-8-SSS SERIES
Recommended Conditions
Profile Feature
Average ramp-up rate (T
L
to T
P
)
Preheat
-Temperature Min (T
S min
)
-Temperature Max (T
S max
)
-Time (min to max) (ts)
T
S max
to T
L
-Ramp-up Rate
Time maintained above:
-Temperature (T
L
)
-Time (t
L
)
Peak Temperature (T
P
)
Time within 5℃ of actual Peak Temperature (t
P
)
Ramp-down Rate
Time 25℃ to Peak Temperature
Pb-Free Assembly
3℃/second max.
150℃
200℃
60-180 seconds
3℃/second max.
217℃
60-150 seconds
260℃
20-40 seconds
6℃/second max.
8 minutes max.
Packaging
SMD Packing (Tape & Reel)
Tape
Symbol
W
P0
P
P2
D0
E
F
A0
K0
B0
T
Reel
t
D
d
Dimension (mm)
Spec.
Tolerance
16.00
±0.20
4.00
±0.10
16.00
±0.10
2.00
±0.10
1.55
±0.10
1.75
±0.10
7.50
±0.10
10.30
±0.10
8.40
±0.10
8.40
±0.10
0.50
±0.05
330.00
13.00
20.00
2.00
±2.00
±0.50
±2.00
±0.20
D
d
L
t
L
Quantity: 300pcs
Revision: GDT-3R-8-SSS SERIES-001(A2)
5/5
http://brightking.pulseelectronics.com
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