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Littelfuse SJ Gas Discharge Tubes

Littelfuse SJ Gas Discharge Tubes (GDTs) offer high surge ratings (3KA to 5KA surge capability tested with 8/20μs pulse) in a miniature package (4.5mm x 3.2mm x 3.2mm). The low insertion loss (0.01dB at 1.0GHz to 2.1dB at 3.5GHz) of the Littelfuse SJ series is well-suited to broadband equipment applications. These GDTs offer very low capacitance and show slight signal losses up to high frequencies in high-frequency data-line applications.

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
  • 3KA to 5KA surge capability tested with 8/20μs pulse
  • Ultra small devices (EIA 1812)
  • Non-radioactive
  • <0.5pF low capacitance
  • 90V to 1000V voltage range
  • UL recognized
  • Conforms to ITU-T Rec. K. 12; IEC 61643-311
  • Square outline

Applications

  • Communication equipment
  • Satellite and CATV equipment
  • Test equipment
  • Data lines
  • Power supplies
  • Telecom SLIC protection
  • Broadband equipment
  • ADSL equipment (including ADSL2+)
  • XDSL equipment
  • General telecom equipment

Specifications

  • 90VDC to 1000VDC breakdown voltage (at 100V/s)
  • 0.01dB (at 1.0GHz) to 2.1dB (at 3.5GHz) insertion loss
  • Impulse breakdown voltage
    • 500V to 1.4KV (at 100V/µs)
    • 600V to 1500V (at 1KV/µs)
  • 109Ω minimum insulation resistance at 50VDC or 100VDC
  • 0.4pF or 0.5pF maximum capacitance at 1MHz
  • 3A or 5A nominal AC discharge current
  • 500A maximum impulse discharge current
  • -40°C to +125°C operating and storage temperature range

Dimensions

Chart - Littelfuse SJ Gas Discharge Tubes
Publicerad: 2025-02-12 | Uppdaterad: 2025-02-18