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
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
www.brightking.com
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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