Gas Discharge Tubes(GDT)
Description
Gas discharge tubes (GDT) use noble gasses enclosed in
ceramic tubes to provide an alternate circuit path for voltage
spikes. The ceramic envelope and with nickel connectors
allow for high loads. SMD4532 Gas Discharge Tubes
(GDT) series has a surge rating of 2kA, 8/20μs.Offered in a
Squared Surface Mount package, which helps to make pick
and place on PCB process easier.
This GDT series is perfectly suited for broadband
equipment applications. The GDT’s low off-state
capacitance is compatible with high bandwidth applications
and this capacitance loading value does not vary if the
voltage across the GDT changes.
SMD4532 Gas Discharge Tube (GDT) series are
specifically designed for protection of electrical, multimedia,
and communication equipment against over voltage
transients in surface mount assembly applications.
SMD4532 Series
Electrical symbol
Features
l
l
l
l
l
l
l
l
l
l
l
Excellent response to fast rising transients
Stable breakdown voltage
GHz working frequency
8/20μs Impulse current capability: 2KA
Surface Mount package
Non-Radioactive
Ultra Low capacitance(<0.5pF) and insertion loss
Lead-free and RoHS compliant
UL 497B Recognized: E465335
Very Small Size(EIA 1812)
Storage and operational temperature: -40~+90°C
Applications
l
Communication
equipment
l
CATV equipment
l
Test equipment
l
Data lines
l
Power supplies
l
Telecom SLIC
protection
l
Broadband equipment
l
ADSL equipment,
including ADSL2+
l
XDSL equipment
l
Satellite and CATV
equipment
l
General telecom
equipment
Part Number Code
S
M
D
4
5
3
2
-
x
x
x
N
F
8/20μs Impulse
Surface Mount Package
Product Series
Size: 4.5mm*3.2mm*2.7mm
DC Spark-over Voltage
Tolerance N:
±30%
Current
DC Spark-over Voltage
F: 2KA
Specifications are subject to change without notice.
Please refer to http://
www.ruilon.com.cn
for current information.
Revised: 2017-04-25
Page:1
Gas Discharge Tubes(GDT)
Electrical Characteristics
Impulse Spark-over
DC
Spark-over
Part Number
Voltage
1) 2)
@100V/S
Max
V
V
Max
V
Min
GΩ
Max
pF
100V/μS
1KV/μS
Voltage
SMD4532 Series
Life Ratings
Insulation
Resistance
3)
Capacitance
@1MHz
Impulse Discharge
Current
@8/20μS
Nominal
±5
times
KA
Max
1 time
KA
Impulse
Impulse Life
Withstanding
Discharge
@10/1000μS
Voltage
Current
Capacity
10A
@10/700μS,
Nominal
40Ω
Min
5 times
±5
times
AC
A
KV
Times
SMD4532-070NF
SMD4532-075NF
SMD4532-090NF
SMD4532-120NF
SMD4532-150NF
SMD4532-200NF
SMD4532-230NF
SMD4532-300NF
SMD4532-350NF
SMD4532-400NF
SMD4532-470NF
SMD4532-500NF
SMD4532-600NF
70±30%
75±30%
90±30%
120±30%
150±30%
200±30%
230±30%
300±30%
350±30%
400±30%
470±30%
500±30%
600±30%
500
500
500
500
500
600
600
700
800
850
900
1000
1100
600
600
600
600
600
700
700
800
900
950
1000
1100
1200
1
1
1
1
1
1
1
1
1
1
1
1
1
~60V
~10V
~0.3A
~0.20g
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
2
2
2
1
1
1
1
1
1
1
1
1
1
6
6
6
6
6
6
6
6
6
6
6
6
6
100
100
100
100
100
100
100
100
100
100
100
100
100
Glow Voltage at 10mA..............................................................
Arc Voltage at 1A......................................................................
Glow to Arc transition Current……………………………………
Weight………………………………………………………………
Operation and storage temperature……………………………..
Climatic category (IEC 60068-1)…………………………………
Marking……………………………………………………………
Surface treatment…………………………………………………
1)
2)
3)
-40~90°C
40/090/21
Without
Matte-tin plated
At delivery AQL 0.65 level II, DIN ISO 2859
In ionized mode
Insulation Resistance Measuring Voltage:
70V and 75V at DC 25V
90V~150V at DC 50V
Other at DC 100V
Terms in accordance with ITU-T Rec. K.12, IEC 61643-311, GB/T 9043.
Specifications are subject to change without notice.
Please refer to http://
www.ruilon.com.cn
for current information.
Revised: 2017-04-25
Page:2
Gas Discharge Tubes(GDT)
Dimensions
Symbol
A
B
C
D
X
X1
Y
SMD4532 Series
Millimeters
3.2±0.2
2.7±0.2
4.5±0.3
0.5±0.1
1.5
4.5
4.2
Inches
0.126±0.008
0.106±0.008
0.177±0.012
0.020±0.004
0.059
0.177
0.165
Recommended Soldering Pad Layout
Taping and Reel Specifications
Symbol
W
A0
B0
K0
P
F
SMD-tape according to IEC 60286-3
E
D
P0
P2
T
D0
D1
D2
W1
Direction of Unreeling
Millimeters
12±0.3
3.5±0.1
5.3±0.1
2.9±0.1
8.0±0.1
5.5±0.1
1.75±0.1
1.5+0.1/-0.0
4±0.1
2±0.1
0.35±0.05
13.3±0.15
330±2
100+1/-2
12.5±0.4
Inches
0.472±0.012
0.138±0.004
0.209±0.004
0.114±0.004
0.315±0.004
0.217±0.004
0.069±0.004
0.059+0.004/-0.0
0.157±0.004
0.079±0.004
0.014±0.002
0.524±0.006
12.992±0.079
3.937+0.039/-0.079
0.492±0.016
Packaging Quantity:
2,500 PCS per reel (13”)
3 reels per inner box
7,500 PCS per inner box
Specifications are subject to change without notice.
Please refer to http://
www.ruilon.com.cn
for current information.
Revised: 2017-04-25
Page:3
Gas Discharge Tubes(GDT)
Soldering Parameters - Reflow Soldering (Surface Mount Devices)
Reflow Condition
T
P
Ramp-up
Critical Zone
T
L
to T
P
SMD4532 Series
Pb - Free assembly
150°C
200°C
60 -180 Seconds
3°C/second max
5°C/second max
217°C
60 -150 Seconds
260 +0/-5°C
10 - 30 Seconds
6°C/second max
8 minutes Max
260°C
-Temperature Min (T
s(min)
)
Pre Heat
-Temperature Max (T
s(max)
)
- Time (min to max) (t
s
)
Ramp-down
T
L
T
S(max)
Temperature
Average ramp up rate ( Liquids Temp
T
L
) to peak
T
S(max)
to TL - Ramp-up Rate
T
S(min)
Preheat
Reflow
25
Time to peak temperature
(t 25℃ to peak)
- Temperature (T
L
)
(Liquids)
- Time (min to max) (t
s
)
Time
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
Surface mounted components (SMD) may exhibit a temporary increase in the DC spark-over voltage after the solder reflow
process. The components will recover within 24 hours. There is no quality defect nor change in protection levels during the
temporary change in DC spark-over voltage.
Specifications are subject to change without notice.
Please refer to http://
www.ruilon.com.cn
for current information.
Revised: 2017-04-25
Page:4
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