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Home » NEWEST Products » New by Manufacturer » Littelfuse » Littelfuse Squared Gas Discharge Tubes
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Littelfuse Squared Gas Discharge Tubes

GDTs dissipate voltage transients through a contained plasma gas. They have high insulation resistance plus low capacitance and leakage to ensure minimal effect on normal operation of equipment. Littelfuse devices offer a small footprint and are available in leaded and surface mount configurations, with high surge handling capability. Their fast response to transient over-voltage events, and ability to dissipate large amounts of energy, translates into reduced risk of equipment damage. The amount of energy they can dissipate makes them a good choice for lightning surge protection, particularly for telecomm equipment located in outdoor structures.

SE Series

Littelfuse SE series GDT offers high surge ratings in a miniature package. It’s designed for surface mounting on PCB with small size 3.2x1.6x1.6mm. Low insertion loss is perfectly suited to broadband equipment applications. The capacitance does not vary with voltage, and will not cause operational problems with ADSL2+, where capacitance variation across Tip and Ring is undesirable. These devices are extremely robust and are able to divert a 500A-600A pulse in a miniature package 1206 without destruction.

Features
  • RoHS compliant and Lead-free
  • Ultra small size (EIA 1206)
  • Low capacitance (<0.5 pF)
  • Excellent response to fast-rising transient
  • Ultra-low insertion loss
  • Excellent stability on multiple pulse duty cycles
Applications
  • Satellite and CATV Equipment
  • CCTV equipment
  • Analog video
  • RS-485
  • Set-top box
  • Ethernet

SG Series

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.

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


  • Littelfuse
  • Circuit Protection