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Home » Product Knowledge Center » Littelfuse SG Series Gas Discharge Tubes
Littelfuse SG Series Gas Discharge Tubes

Littelfuse SG Series Gas Discharge Tubes

Littelfuse SG Series Gas Discharge Tubes (GDT) offer high surge ratings in a miniature package. They are designed for surface mounting on PCB with a small size of 4.5x3.2x2.7mm. The GDTs' low insertion loss is perfectly suited to broadband equipment applications. Their capacitance does not vary with voltage, and will not cause operational problems with ADSL2+, where capacitance variation across Tip and Ring is undesirable. Littelfuse SG Series Gas Discharge Tubes are extremely robust and are able to divert a 1000A pulse without destruction.

Part Number DC Breakdown Max Impulse Breakdown
SG75 75V 500V
SG90 90V 500V
SG150 150V 500V
SG230 230V 650V
SG300 300V 700V
SG300Q 300V 580V
SG350 350V 750V
SG350Q 350V 600V
SG400 400V 800V
SG420 420V 800V
SG420Q 420V 650V
Features
  • RoHS compliant and Lead-free
  • GHz working frequency
  • Excellent stability on multiple pulse duty cycle
  • Excellent response to fast rising transients
  • Ultra low insertion loss
  • 1-2KA surge capability tested with 8/20μS pulse as defined by IEC 61000-4-5
  • Ultra small devices offered in a variety of mounting lead forms
  • Non-radioactive
  • Low capacitance (<1pF)
  • Voltage ranges 75V to 420V
  • UL recognized
  • Conforms to ITU-T K12, IEC 1000-4-5
  • Square outline
Applications
  • Communication equipment
  • Test equipment
  • Datas lines
  • Power supplies
  • Telecom SLIC protection
  • Broadband equipment
  • ADSL equipment, including ADSL2+
  • XDSL equipment
  • Satellite and CATV equipment
  • General telecom equipment
Package Dimensions in mm

Package Dimensions

  • Littelfuse
  • Circuit Protection