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U-Series
Sankosha Gas Discharge Tubes (GDT) - Surge Arresters

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Applications:

  • Cable Telephony Products
  • Modems/Cable Modems
  • Broadband/CATV/Coaxial Protectors
  • xDSL Modems and Peripherals
  • Building Entry/Outside Plant
  • Transient Voltage Surge Suppression
  • Features:

  • UL 479B Recognized (File E140906)
  • High Surge Current Rating
  • Non-Radioactive
  • Small Size
  • RoHS Compliant (100% Lead-Free)
  • ISO 9001 and ISO 14001 Certified
  • Low Capacitance ≤ 1.0pF
  • Proven Performance

  • Part
    Number
    (Model A)
    Part
    Number
    (Model B)
    DC Breakdown Voltage(1) Impulse Breakdown Voltage DC Holdover Voltage(3) Impulse Life
    (10/1000μs 500A)
    Impulse Discharge Current
    (8/20μs)
    AC Discharge Current
    (50Hz)
    100V/s 100V/μs 1kV/μs 1 Time 10 Times(4) 9 Cycles
    1 Time
    1 Second
    U-1A U-1B 75V ≤ 500V ≤ 700V ≤ 52V 300 Times 10 kA 5 kA 65 A 10A, 5 Times
    U-2A U-2B 90V ≤ 500V ≤ 700V ≤ 52V 300 Times 10 kA 5 kA 65 A 10A, 5 Times
    U-3A U-3B 145V ≤ 500V ≤ 700V ≤ 80V 300 Times 10 kA 5 kA 65 A 10A, 5 Times
    U-4A U-4B 230V ≤ 600V ≤ 750V ≤ 135V 300 Times 10 kA 5 kA 65 A 10A, 5 Times
    U-5A U-5B 250V ≤ 600V ≤ 800V ≤ 135V 500 Times 10 kA 5 kA 65 A 10A, 10 Times
    U-6A U-6B 300V ≤ 700V ≤ 850V ≤ 150V 500 Times 10 kA 5 kA 65 A 10A, 10 Times
    U-7A U-7B 350V ≤ 700V ≤ 850V ≤ 150V 500 Times 10 kA 5 kA 65 A 10A, 10 Times
    U-8A U-8B 400V ≤ 700V ≤ 850V ≤ 150V 500 Times 10 kA 5 kA 65 A 10A, 10 Times
    U-9A U-9B 470V ≤ 700V ≤ 850V ≤ 150V 500 Times 10 kA 5 kA 65 A 10A, 10 Times
    U-10A U-10B 600V ≤ 800V ≤ 1000V ≤ 150V 500 Times 10 kA 5 kA 65 A 10A, 10 Times
    U-11A U-11B 800V ≤ 1000V ≤ 1200V ≤ 150V 500 Times 10 kA 5 kA 65 A 10A, 10 Times


    Notes:
    1. DC Breakdown Voltage Ranges are:
                 20% for U-1 and U-2
                 15% for U-3, U-4, U-5, U-6, U-7, U-8, U-9, U-10 and U-11
    2. Insulation Resistance for all parts in the U-Series is ≥ 10,000 MΩ measured at:
                DC 50V for the U-1, U-2 and U-3
                DC 100V for the U-4, U-5, U-6, U-7 and U-8
                DC 250V for the U-9, U-10 and U-11
    3. DC Holdover Voltage measured in accordance with the ITU-T K.12 or the IEEE C62.31-1987 Test Circuit
    4. 5 times each polarity
    5. Capacitance measured at 1 MHz for all part numbers is ≤ 1.0 pF
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