Littelfuse SL1122 Series - Manual

Gas Discharge Tube (GDT) Products
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/08/14
SL1122A Series
Description
Features
• RoHs Compliant
• Excellent response to
fast rising transients
• Flat response up to
10kV/μs
• 10kA surge capability
tested with 8/20μs
pulse as defined by IEC
61000-4-5
• Thermal failsafe
Applications
• MDF protection
• ADSL equipment
• XDSL equipment • Alarm panels
• General telecom
equipment
AGENCY AGENCY FILE NUMBER
E128662
Agency Approvals
2 Electrode GDT Graphical Symbol
a
e
b
(centre electrode)
The SL1122A series Hybrid features a high
performance Alpha Gas Plasma Tube in conjunction
with a MOV. These devices are matched so that high
speed pulses are initially clamped by the MOV, 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/µs to 10 kV/µs, so eliminates the dv/dt
switching delay normally exhibited by standard GDTs.
These devices are extremely robust and are able to
divert a 10,000 Amp pulse without destruction.
Electrical Characteristics
Part Number
Device Specifications (at 25°C) Life Ratings
DC Breakdown
in Volts 1, 2
(@100V/s)
DC Voltage 2
(1kV/μs Ignition Time)
Insulation
Resistance
Capacitance
(@1MHz, 0V bias,
1V oscillation)
Arc Voltage
(on state voltage)
@1Amp Min
Surge Life 1
(10/1000μs
300x +/-)
Surge Current 1
(8/20μs x 10)
Nominal
AC Discharge
Current 1
(10x1s@50Hz)
DC Holdover
Voltage
(<150msecs.)
MIN TYP MAX MIN MAX TYP TYP
SL1122A090 72 90 108 200 (< 10µs) > 10 8 Ω (at 50V) 270 pF
~10 to 35
Volts
200 A 10 kA 10 A
50 V
SL1122A230 184 230 276 350 (< 10µs)
> 10 8 Ω (at 100V) 100 pF 135 V
SL1122A260 210 260 310 400 (< 10µs)
Tested in accordance with ITU-T Rec K.12
Notes:
1. Total current through centre electrode
2. Maximum Peak Break Over Voltage
SL1122A Series Hybrid
RoHS