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 ModelsSamplesCompare
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
SL1122A090 GP ALPHA HYBRID 3T A90V RoHS No 01/01/2005 PbFree No 01/01/2005 No
SL1122A200 GP ALPHA HYBRID 3T A200V RoHS No 01/01/2005 PbFree No 01/01/2005 No
SL1122A230 GP ALPHA HYBRID 3T A230V RoHS No 01/01/2005 PbFree No 01/01/2005 No
SL1122A230P GP ALPHA HYBRID 3T A230V RoHS No 01/01/2005 PbFree No 01/01/2005 No
SL1122A250 GP ALPHA HYBRID 3T A250V RoHS No 01/01/2005 PbFree No 01/01/2005 No
SL1122A260 GP ALPHA HYBRID 3T A260V RoHS No 01/01/2005 PbFree No 01/01/2005 CoC_RoHS10_SL1122A260 REACH201_Declaration_SL1122A260 No
Does not Contain
SL1122A450 GP ALPHA HYBRID 3T A450V RoHS No 01/01/2005 PbFree No 01/01/2005 No
SL1122A450-LC-017 GP ALPHA 3 & HYBRID-LC 1122 450V (SHORT) RoHS No 01/01/2005 PbFree No 01/01/2005 No
SL1122A450N-003 GP ALPHA 3 & HYBRID - SPD 25B RoHS No 01/01/2005 PbFree No 01/01/2005 No
SL1122A450N-004 GP ALPHA 3 & HYBRID-SPD 25A (SQUARE POT) RoHS No 01/01/2005 PbFree No 01/01/2005 No
SL1122A450SN-006 GP ALPHA 3 & HYBRID - SPD25C RoHS No 01/01/2005 PbFree No 01/01/2005 No
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