3R-8 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: UL: E244458
Applications
■
■
■
■
Repeaters, Modems.
Telephone Interface, Line cards.
Data communication equipment.
Line test equipment
Part Number Code
3
R
8
M: 10KA
P: 20KA
L: Lead
M: SMD
No suffix: Bulk
TR: Tape & Reel packing
Blank: Standard product
F: With failsafe mechanism
8: 8.0mm×10.0mm
3R: 3 Electrodes
Marking
Revision：08-Oct-15
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3R-8 SERIES
Dimensions
L Type
Symbol
Spec.
D
T
T1
L
L-F Type
S
4.4
±0.4
8.0
10.0
12.0
15.0
Tolerance
+0.2, -0.8
±0.5
±0.5
±0.5
Dimension (mm)
d
1.0
±0.1
R1
9.8
±0.4
R2
8.1
±0.3
M Type
D
8.0
+0.2, -0.8
T
10.0
±0.5
B
0.5
±0.1
Notes: This type is not suitable for PCB soldering.
B1
1.5
±0.2
Revision：08-Oct-15
www.brightking.com
3R-8 SERIES
Electrical Characteristics
DC
Spark-over
Part
Number
Voltage
100V/s
(V)
3RM075L-8
3RM090L-8
3RM150L-8
3RM200L-8
3RM230L-8
3RM350L-8
3RM400L-8
3RM470L-8
3RM600L-8
3RM800L-8
3RM075M-8
3RM090M-8
3RM150M-8
3RM200M-8
3RM230M-8
3RM350M-8
3RM400M-8
3RM470M-8
3RM600M-8
3RM800M-8
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
700
850
850
950
1300
1500
Nominal
Impulse
Discharge
Current
8/20μs
10times
(KA)
10
10
10
10
10
10
10
10
10
10
Alternating
Discharge
Current
50Hz,1sec
(A)
10
10
10
10
10
10
10
10
10
10
Minimum
Insulation
Resistance
Test
Voltage
DC(V)
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
(GΩ)
(pF)
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
3RM075-8
3RM090-8
3RM150-8
3RM200-8
3RM230-8
3RM350-8
3RM400-8
3RM470-8
3RM600-8
3RM800-8
Impulse
Life
10/1000μs
100A
(times)
300
300
300
300
300
300
300
300
300
300
Maximum
Capacitance
Device
Marking
1MHz
Code
3RP075L-8
3RP090L-8
3RP150L-8
3RP200L-8
3RP230L-8
3RP350L-8
3RP400L-8
3RP470L-8
3RP600L-8
3RP800L-8
3RP075M-8
3RP090M-8
3RP150M-8
3RP200M-8
3RP230M-8
3RP350M-8
3RP400M-8
3RP470M-8
3RP600M-8
3RP800M-8
75±20%
90±20%
150±20%
200±20%
230±20%
350±20%
400±20%
470±20%
600±20%
800±20%
700
700
700
700
700
850
850
950
1300
1500
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
300
300
300
300
300
300
300
300
300
300
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
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
3RP075-8
3RP090-8
3RP150-8
3RP200-8
3RP230-8
3RP350-8
3RP400-8
3RP470-8
3RP600-8
3RP800-8
Revision：08-Oct-15
www.brightking.com
3R-8 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,
without causing the DC breakdown voltage to change more than 25%
from its initial measured value.
Requirement
Impulse
Discharge Current
To meet
the specified
value
Alternating
Discharge Current
Rated RMS value of AC current at 50Hz, 1 sec. for 10 times with
interval time 3 min. DC spark-over voltage shall not change more than
±25% from its initial value. Test is between each side electrode and
center electrode.
IR＞10
8
ohms (-20%, +30% for 70~90V).
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
Insulation
Resistance
Capacitance
Revision：08-Oct-15
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3R-8 SERIES
Recommended Soldering Conditions
Wave Soldering
Item
Peak Temperature
Dipping Time
Soldering
Reflow Soldering
Conditions
265℃
10 seconds
1 time
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.
Revision：08-Oct-15
www.brightking.com
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