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8
GAS DISCHARGE
TUBES
Gas Discharge Tubes
High Performance Alpha Range
ORDERING INFORMATION
1122 A
Voltage
SL
All dimensions in mm
3 ELECTRODE GDT
a=TIP
b=RING
e=GROUND
(centre electrode)
GRAPHICAL SYMBOL
a
b
e
GreentubeTM SL1122A Series Hybrid Gas Plasma Arresters
The SL1122 series Hybrid features a high performance Alpha Gas
Plasma Tube in conjunction with a high speed Silicon Avalanche
Diode ( SAD ). These devices are matched so that High speed
pulses are initially clamped by the SAD, then as the current rises,
the transient energy is switched through the Gas Tube. The
Hybrid offers high levels of performance on fast rising transients
in the domain of 100V/S to 10 KV/S, so eliminates the dv/dt
switching delay normally exhibited by standard GDT's. These
devices are extremely robust and are able to divert a 10,000Amp
pulse without destruction, so are ideal for central office ( tele-
phone exchange ) protection.
FEATURES
RoHs
Compliant
Excellent response to fast rising transients.
Flat response up to 10KV/S.
10KA surge capability tested with 8/20S pulse as defined by
IEC 61000-4-5
SAD ensures short circuit failure mode in the event of severe
transient overload.
Thermal failsafe.
Applications:
MDF protection
Alarm panels.
ADSL equipment.
XDSL equipment.
General Telecom Equipment
Mechanical Specifications:
Weight:
2.7g (0.095 oz.)
Materials:
Electrode Base: Nickel Iron Alloy
Electrode Plating: Bright Sn
Body: Ceramic
Device Marking:
Littelfuse `LF' logo, voltage and date code
RoHS
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Gas Discharge Tubes
CCT DIAGRAM
LITTELFUSE 3 TERMINAL ARRESTER SERIES
TOTALLY NON-RADIOACTIVE, UL BREAKER VOLTAGE
Notes:
(1) Measured using a voltage rate of rise of 100V/s.
(2) In ionized mode
(3) Tested according to ITU-T Rec.K.12
(4) Either end electrode to center electrode
(5) Total current through center electrode, both line electrodes subject to simultaneous pulses
(6) 10 shots, AC 60Hz, 1 sec duration
(7) 10 shots, 8/20s waveform
(8) Measured @ 100V
(9) Measured at MHz, line to ground
Part Number
SL1122A090
SL1122A200
SL1122A230
SL1122A250
SL1122A260
SL1122A350
SL1122A450
DC
Voltage
(V)
90
200
230
250
260
350
450
Breakover
Voltage
1,2,4
(V)
70-120
140-250
184-276
200-300
210-350
280-420
420-600
Max Dynamic
Breakover
Voltage @
1 kV/us (Vbr)
150
250
350
400
400
600
700
Max
Repetitive
Impulse
Discharge
Current
4,7
(kA)
5
5
5
5
5
5
5
Max
Repetitive
Impulse
Discharge
Current
5,7
(kA)
10
10
10
10
10
10
10
Alternating
Discharge
Current
4,6
(A)
5
5
5
5
5
5
5
I
nsulation
Resistance
8
()
1x10
8
@ 50V
1x10
8
@ 120V
1x10
8
@ 150V
1x10
8
@ 150V
1x10
8
@ 175V
1x10
8
@ 265V
1x10
8
@ 350V
Max
Capacitance
9
(pF)
200
100
100
100
100
100
100
GreentubeTM SL1122A Series Hybrid Gas Plasma Arresters
High Performance Alpha Range
Holdover
Voltage
3
(V)
50
120
135
135
135
135
135
Nominal
On-State
Voltage @
1A (V)
20
20
20
20
20
20
20
HYBRID
G.D.T. ONLY
RoHS
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