DATA SHEET
GAS DISCHARGE TUBES
TELEPHONE INTERFACE
3R-8 series
Product specification– April 26, 2021 V.1
RoHS compliant & free
Circuit Protection
Product Specification
GAS DISCHARGE TUBS
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
Applications
■ Repeaters, Modems
■ Telephone Interface, Line cards
■ Data communication equipment
■ Line test equipment
Part Number Code
3
/
8
R
Electrical
Characteristics
M: 10KA
P: 20KA
Electrode Numbers
3R: 3 Electrodes
Ordering Code
Lead Type
L: Lead
M: SMD
DC
Spark-over
Voltage
Lead type
3RMXXXL-8/B
3RPXXXL-8/B
Lead
3RMXXXL-8-F/B
3RPXXXL-8-F/B
Lead
3RMXXXM-8
3RPXXXM-8
SMD
2
6
3R-8 series
Packing Code
B : Box package
Failsafe Option
Blank: Standard product
F: With failsafe mechanism
Dimensions
8: 8.0mm×10.0mm
Failsafe option
Package
Box(Tray)
With failsafe
mechanism
Box(Tray)
Tape & Reel
Circuit Protection
Product Specification
GAS DISCHARGE TUBS
3
6
3R-8 series
Marking
: BrightKing Logo
3RM090-8 : Device Marking Code
XXXX
: Internal Control Code
Dimensions
L Type
T1
T
Dimension (mm)
Symbol
Spec.
Tolerance
D
8.0
+0.2, -0.8
T
10.0
±0.5
T1
12.0
±0.5
L
15.0
±0.5
S
4.4
±0.4
d
1.0
±0.1
R1
9.8
±0.4
R2
8.1
±0.3
D
8.0
+0.2, -0.8
T
10.0
±0.5
B
0.5
±0.1
B1
1.5
±0.2
L
D
1.2
4.4
S
4.4
Recommended Pad Size
d
L-F Type
T1
T
R1
R2
1.2
4.4
S
4.4
Recommended Pad Size
d
M Type
T
D
B1
B
Notes: This type is not suitable for PCB soldering.
Electrical Characteristics (3RM-8)
Part
Number
DC
Spark-over
Voltage
Maximum
Impulse
Spark-over
Voltage
Nominal
Impulse
Discharge
Current
Alternating
Discharge
Current
Impulse
Life
100V/s
1000V/μs
8/20μs
10times
50Hz,1sec
10/1000μs
100A
Test
Voltage
Minimum
Insulation
Resistance
(V)
(V)
(KA)
(A)
(times)
DC(V)
Maximum
Capacitance
1MHz
Device
Marking
Code
(GΩ)
(pF)
3RM075L-8
3RM075M-8
75±20%
700
10
10
300
25
1.0
2.0
3RM075-8
3RM090L-8
3RM090M-8
90±20%
700
10
10
300
50
1.0
2.0
3RM090-8
3RM150L-8
3RM150M-8
150±20%
700
10
10
300
100
1.0
2.0
3RM150-8
3RM200L-8
3RM200M-8
200±20%
700
10
10
300
100
1.0
2.0
3RM200-8
3RM230L-8
3RM230M-8
230±20%
700
10
10
300
100
1.0
2.0
3RM230-8
3RM350L-8
3RM350M-8
350±20%
850
10
10
300
100
1.0
2.0
3RM350-8
3RM400L-8
3RM400M-8
400±20%
850
10
10
300
100
1.0
2.0
3RM400-8
3RM470L-8
3RM470M-8
470±20%
950
10
10
300
250
1.0
2.0
3RM470-8
3RM600L-8
3RM600M-8
600±20%
1300
10
10
300
250
1.0
2.0
3RM600-8
Circuit Protection
Product Specification
GAS DISCHARGE TUBS
4
6
3R-8 series
Electrical Characteristics (3RP-8)
Part
Number
DC
Spark-over
Voltage
Maximum
Impulse
Spark-over
Voltage
Nominal
Impulse
Discharge
Current
Alternating
Discharge
Current
Impulse
Life
100V/s
1000V/μs
8/20μs
10times
50Hz,1sec
10/1000μs
100A
Test
Voltage
Minimum
Insulation
Resistance
(V)
(V)
(KA)
(A)
(times)
DC(V)
Maximum
Capacitance
1MHz
Device
Marking
Code
(GΩ)
(pF)
3RP075L-8
3RP075M-8
75±20%
700
20
20
300
25
1.0
2.0
3RP075-8
3RP090L-8
3RP090M-8
90±20%
700
20
20
300
50
1.0
2.0
3RP090-8
3RP150L-8
3RP150M-8
150±20%
700
20
20
300
100
1.0
2.0
3RP150-8
3RP200L-8
3RP200M-8
200±20%
700
20
20
300
100
1.0
2.0
3RP200-8
3RP230L-8
3RP230M-8
230±20%
700
20
20
300
100
1.0
2.0
3RP230-8
3RP350L-8
3RP350M-8
350±20%
850
20
20
300
100
1.0
2.0
3RP350-8
3RP400L-8
3RP400M-8
400±20%
850
20
20
300
100
1.0
2.0
3RP400-8
3RP470L-8
3RP470M-8
470±20%
950
20
20
300
250
1.0
2.0
3RP470-8
3RP600L-8
3RP600M-8
600±20%
1300
20
20
300
250
1.0
2.0
3RP600-8
Electrical Ratings
Items
Test Condition/Description
DC Spark-over
Voltage
The voltage is measured with voltage ramp dv/dt=100V/s. Test is between
each side electrode and center electrode.
Maximum Impulse
Spark-over Voltage
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
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
Impulse
Discharge Current
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. Test is between each side electrode and center electrode.
Insulation
Resistance
The resistance of gas tube shall be measured between each side electrodes
and center electrode.
Capacitance
The capacitance of gas tube shall be measured between each side
electrodes and center electrode. Test frequency: 1MHz
To meet
the specified
value
Circuit Protection
Product Specification
GAS DISCHARGE TUBS
Recommended Soldering Conditions
Wave Soldering
300
Preheating
Soldering
Cooling
Maximum Wave 265℃
Temperature (℃)
250
200
150
100
50
0
0
0.5
1
1.5
2
2.5
Time (minutes)
3
3.5
Item
Conditions
Peak Temperature
265℃
Dipping Time
10 seconds
Soldering
1 time
4
Reflow Soldering
Critical Zone
TL to TP
tP
TP
Ramp-up
TL
tL
Temperature
TS max
TS min
Ramp-down
tS
Preheat
25
t 25℃ to Peak
Time
Profile Feature
Pb-Free Assembly
Average ramp-up rate (TL to TP)
3℃/second max.
Preheat
-Temperature Min (TS min)
-Temperature Max (TS max)
-Time (min to max) (ts)
150℃
200℃
60-180 seconds
TS max to TL
-Ramp-up Rate
3℃/second max.
Time maintained above:
-Temperature (TL)
-Time (tL)
217℃
60-150 seconds
Peak Temperature (TP)
260℃
Time within 5℃ of actual Peak Temperature (tP)
Ramp-down Rate
Time 25℃ to Peak Temperature
5
6
3R-8 series
20-40 seconds
6℃/second max.
8 minutes max.
Circuit Protection
Product Specification
GAS DISCHARGE TUBS
6
6
3R-8 series
Packaging
Axial Packing (Box)
Skin packing
Dimension (mm)
Symbol
Spec.
Tolerance
A
217.0
±2.0
B
207.0
±2.0
H
10.3
±0.5
Quantity: 100pcs
Inner box
A0
225.0
±2.0
B0
210.0
±2.0
H0
60.0
±2.0
Quantity: 500pcs
SMD Packing (Tape & Reel)
Tape
Symbol
P2
P1
t0
E
P0
B0
B1
W
F
D0
K0
A0
Reel
t
D
Dimension (mm)
Spec.
Tolerance
W
16.00
±0.20
P0
4.00
±0.10
P1
16.00
±0.10
P2
2.00
±0.10
D0
1.55
±0.05
E
1.75
±0.10
F
7.50
±0.10
A0
11.60
±0.10
K0
8.90
±0.10
B0
8.60
±0.10
B1
10.00
±0.10
t0
0.50
±0.05
D
330.00
±2.00
d
13.00
±0.50
L
20.00
±2.00
t
2.00
±0.20
d
L
Quantity: 300pcs
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