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: E244458
Applications
■
■
■
■
Repeaters, Modems
Telephone Interface, Line cards
Data communication equipment
Line test equipment
Part Number Code
3
R
8
Electrical
Characteristics
M: 10KA
P: 20KA
Electrode Numbers
3R: 3 Electrodes
DC
Spark-over
Voltage
Lead Type
L: Lead
M: SMD
Packing Code
No suffix: Bulk
TR: Tape & Reel packing
Failsafe Option
Blank: Standard product
F: With failsafe mechanism
Dimensions
8: 8.0mm×10.0mm
Marking
: BrightKing Logo
3RM090-8 : Device Marking Code
YXXX
: Date Code
Revision: GDT-3R-8 SERIES-001(A2)
2/7
http://brightking.pulseelectronics.com
3R-8 SERIES
Dimensions
L Type
Symbol
T1
T
Dimension (mm)
Spec.
D
Tolerance
+0.2, -0.8
±0.5
±0.5
±0.5
D
T
1.2
4.4
S
d
4.4
8.0
10.0
12.0
15.0
L
T1
L
Recommended Pad Size
L-F Type
S
T1
T
R2
4.4
±0.4
d
R1
1.0
±0.1
1.2
4.4
S
d
4.4
R1
9.8
±0.4
Recommended Pad Size
R2
8.1
±0.3
M Type
D
T
8.0
+0.2, -0.8
T
10.0
±0.5
D
B1
B
B
0.5
±0.1
B1
Notes: This type is not suitable for PCB soldering.
1.5
±0.2
Revision: GDT-3R-8 SERIES-001(A2)
3/7
http://brightking.pulseelectronics.com
3R-8 SERIES
Electrical Characteristics
DC
Spark-over
Voltage
Part
Number
100V/s
(V)
3RM075L-8
3RM090L-8
3RM150L-8
3RM200L-8
3RM230L-8
3RM350L-8
3RM400L-8
3RM470L-8
3RM600L-8
3RM800L-8
3RP075L-8
3RP090L-8
3RP150L-8
3RP200L-8
3RP230L-8
3RP350L-8
3RP400L-8
3RP470L-8
3RP600L-8
3RP800L-8
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
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
700
850
850
950
1300
1500
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
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
3RM075-8
3RM090-8
3RM150-8
3RM200-8
3RM230-8
3RM350-8
3RM400-8
3RM470-8
3RM600-8
3RM800-8
3RP075-8
3RP090-8
3RP150-8
3RP200-8
3RP230-8
3RP350-8
3RP400-8
3RP470-8
3RP600-8
3RP800-8
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.
Requirement
To meet
the specified
value
Revision: GDT-3R-8 SERIES-001(A2)
4/7
http://brightking.pulseelectronics.com
3R-8 SERIES
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.
Crest value
Current (%)
Impulse
Discharge Current
100
90
50
20µs
10
0
8µs
Time
Impulse Width
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.
8
IR＞10 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
Recommended Soldering Conditions
Wave Soldering
300
Preheating
Maximum Wave 265℃
Soldering
Cooling
250
Temperature (℃)
200
150
100
50
0
0
0.5
1
1.5
2
2.5
Time (minutes)
3
3.5
4
Item
Peak Temperature
Dipping Time
Soldering
Conditions
265℃
10 seconds
1 time
Revision: GDT-3R-8 SERIES-001(A2)
5/7
http://brightking.pulseelectronics.com
3R-8 SERIES
Reflow Soldering
Critical Zone
T
L
to T
P
T
P
Ramp-up
T
L
T
S max
Temperature
t
P
t
L
T
S min
t
S
Preheat
Ramp-down
25
t 25℃ to Peak
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: GDT-3R-8 SERIES-001(A2)
6/7
http://brightking.pulseelectronics.com
