3R-8/T SERIES
DATA SHEET
GAS DISCHARGE TUBE – 3R-8/T SERIES
FEATURES
Provide ultra-fast response to surge voltage from slow-rising surge of
100V/s to rapid-rising surge of 1KV/ s.
Stable breakdown voltage.
High insulation resistance.
Low capacitance ( 2pF).
High holdover voltage.
Large absorbing transient current capability.
Storage and operational temperature:
-40 ~ +85
Meets MSL level 1, per J -STD-020
APPLICATION
Repeaters, Modems.
Telephone Interface, Line cards.
Data communication equipment.
Line test equipment.
PART NUMBER CODE
3
R
M
L
8
Electrical
Characteristics
M : 10KA
DC
Spark-over
Electrode Numbers
3R : 3 Electrodes
Voltage
Lead Type
L : Lead
Dimensions
8 : 8.0mm*10.0mm
Revision:09-Feb-12
www.brightking.com
3R-8/T SERIES
DIMENSIONS
T
unit :mm
Dimension
Items
D
D
T
L
d
d
Spec.
8.0
10.0
7.0
1.0
Tolerance
±0.2
±0.3
±0.5
±0.05
(T TYPE)
ELECTRICAL CHARACTERISTIC
DC
Spark-over
Voltage
Part Number
100V/s
(V)
3RM075L-8/T
3RM090L-8/T
3RM150L-8/T
3RM200L-8/T
3RM230L-8/T
3RM350L-8/T
3RM400L-8/T
3RM470L-8/T
3RM600L-8/T
3RM800L-8/T
75±20%
90±20%
150±20%
200±20%
230±20%
350±20%
400±20%
470±20%
600±20%
800±20%
1000V/ s
(V)
700
700
700
700
700
850
850
950
1300
1500
Maximum
Impulse
Spark-over
Voltage
Nominal
Impulse
Discharge
Current
8/20 s,
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
250
250
250
250
1
1
1
1
1
1
1
1
1
1
Impulse
Life
10/1000 s,
100A
(times)
300
300
300
300
300
300
300
300
300
300
Maximum
Capacitance
Device
Marking
Code
1MHz
(G )
(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
3RM145-8
3RM200-8
3RM230-8
3RM350-8
3RM400-8
3RM470-8
3RM600-8
3RM800-8
Note: Impulse discharge current for GDT is the total current equally divided between each line to ground
Revision:09-Feb-12
www.brightking.com
3R-8/T SERIES
ELECTRICAL RATING
Item
DC Spark-over
Voltage
Maximum Impulse
Spark-over Voltage
Test Condition / Description
The voltage is measured with a low rate of rise dv / dt=100V/s
The maximum impulse breakdown voltage is measured with a rise time of
dv / dt=1000V/ s
The maximum current applying a waveform of 8/20 s that can be applied
across the terminals of the gas tube without causing the gas tube to
change more than ±25% from its initial measured DC breakdown voltage.
Dwell time between pulses is 3 minutes.
Requirement
Impulse
Discharge Current
To meet
the specified
value
Alternating
Discharge Current
Rated RMS value of AC current at 50Hz, 1 sec. 10 times. Intervals: 3min.
DC breakdown voltage may not change more than ±25% from its initial
measured DC breakdown voltage.
IR > 10
8
ohms (-20%, +30% for 70 – 90V).
The resistance of gas tube shall be measured each terminal each other
Insulation Resistance terminal.please see above spec
Capacitance
The capacitance of gas tube shall be measured each terminal to each
other terminal.
Test frequency :1MHz
Revision:09-Feb-12
www.brightking.com
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