SL1122 Series - Three Terminal Hybrid Gas Plasma Overvoltage Protector (GDT)

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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/µS to 10 KV/µS, so eliminates the dv/dt switching delay normally exhibited by standard GDT's. These devices are extremely robust and are able to divert a 10,000A pulse without destruction, so are ideal for central office (telephone exchange) protection.


  • 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
  • SAD ensures short circuit failure mode in the event of severe transient overload
  • Thermal failsafe
  • RoHS Compliant


  • MDF protection
  • Alarm panels
  • ADSL equipment
  • XDSL equipment
  • General Telecom Equipment

Access specifications, certifications, check availability and order parts below

Catalog #VMIN Spark
VNom Spark
VMAX Spark
Capacitance (Co) (pF)Impulse Discharge Current @8/20μs (kA)DC
ElectrodesFailsafeMSLPartner ECAD ModelsCompare
Obsolete: 2009 -04-03
Obsolete: 2009 -04-03
Obsolete: 2009 -04-03
Obsolete: 2009 -04-03
Obsolete: 2009 -04-03
Obsolete: 2009 -04-03
Obsolete: 2009 -04-03
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
SL1122A260 GP ALPHA HYBRID 3T A260V RoHS No 01/01/2005 PbFree No 01/01/2005 CoC_RoHS10_SL1122A260_11-20-2019 REACH201_Declaration_SL1122A260_11-20-2019 No
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